Recent Planning Experience in Balancing Collection and Building Preservation Needs: Improvements to the Mercer Museum
Presented at 1993 AIC Meeting in Denver
The Kimbell Art Museum in Fort Worth commissioned renowned Italian architect Renzo Piano to design an expansion underground and connected to the original landmark building by Louis Kahn. Piano's design was greatly influenced by Kahn's structure while having its own identity, and was carefully engineered to protect artworks from moisture through extensive waterproofing and a specially designed glass roof bringing in natural light. The expansion has been praised for successfully adding to the museum without detracting from Kahn's original work.
This document provides information on straw bale home construction including basics, concerns with moisture intrusion, foundation design, exterior design, interior design, plumbing routing, plaster types and application, and crack diagnostics. Straw bale homes can be load-bearing or non-load bearing and are typically plastered on the interior and exterior with cement, earthen, lime or gypsum plasters applied in multiple coats. Moisture intrusion is a key concern and design features aim to prevent moisture from entering or trapping in the walls.
This document provides an overview of moisture and dampness in buildings. It defines dampness as excess moisture entering a building through floors, walls, or roofs. It identifies four main types of dampness based on moisture movement: rising damp, penetration damp, condensation damp, and outlines their causes. The effects of dampness include aesthetic issues, dry rot, corrosion, and health hazards. Remedial measures discussed include damp proof courses, waterproofing, and special techniques. Practical advice is given to reduce excessive moisture through proper ventilation and drainage, and timely repairs.
The document discusses common construction defects in buildings such as cracks and dampness. It defines construction defects and lists main causes as application of forces, effects of materials, temperature changes, and biological agents. Common cracks are categorized based on width and appearance. Cracks are further divided into structural and non-structural types. Main causes of cracks are identified as drying shrinkage, thermal movement, elastic deformation, creep, chemical reactions, foundation movement, and vegetation growth. Specific defect examples and their causes are outlined, such as cracks in brickwork from lack of tying and defective flashing. Remedies for preventing common defects are also provided.
The document summarizes various types of biological and mechanical damage that can affect buildings over time. It discusses how fungi, insects, plants, animals, and environmental factors can deteriorate building materials when conditions are suitable. It also outlines different mechanical stresses like wear and tear from use, vibration, shocks, and thermal expansion/contraction that gradually break down structures. The key message is that proper design and maintenance are needed to prevent defects and extend building lifespan by mitigating destructive biological growth and movement stresses.
In this presentation, FMC's Karen Groulx discusses the recent incidents of falling glass condominium balconies in Toronto.
This presentation contains examples of the kinds of issues companies dealing with similar issues could face. If you are faced with one of these issues, please retain professional assistance as each situation is unique.
This document discusses various causes and types of dampness that can occur in buildings. It describes rising damp, which occurs when water rises up walls through capillary action from the soil. To prevent this, damp-proof courses (DPCs) made of impervious materials like slate or bitumen felt are installed. Deterioration or bridging of the DPC can lead to dampness. Hygroscopic salts in rising damp water can also cause issues by continuing to attract moisture after repairs. The document also discusses penetrating dampness from external water entering walls, condensation dampness caused by high humidity and ventilation issues, and bridging of cavity walls. Treatments include replacing or injecting new DPCs, drainage improvements,
The document discusses various types of building construction defects such as fungal stains, erosion of mortar joints, peeling paint, defective plastered renderings, cracking walls, decayed floorboards, insect attacks, roof defects, dampness penetration, unstable foundations, and poor installation of air conditioning units. It provides details on the causes and symptoms of each type of defect.
The Kimbell Art Museum in Fort Worth commissioned renowned Italian architect Renzo Piano to design an expansion underground and connected to the original landmark building by Louis Kahn. Piano's design was greatly influenced by Kahn's structure while having its own identity, and was carefully engineered to protect artworks from moisture through extensive waterproofing and a specially designed glass roof bringing in natural light. The expansion has been praised for successfully adding to the museum without detracting from Kahn's original work.
This document provides information on straw bale home construction including basics, concerns with moisture intrusion, foundation design, exterior design, interior design, plumbing routing, plaster types and application, and crack diagnostics. Straw bale homes can be load-bearing or non-load bearing and are typically plastered on the interior and exterior with cement, earthen, lime or gypsum plasters applied in multiple coats. Moisture intrusion is a key concern and design features aim to prevent moisture from entering or trapping in the walls.
This document provides an overview of moisture and dampness in buildings. It defines dampness as excess moisture entering a building through floors, walls, or roofs. It identifies four main types of dampness based on moisture movement: rising damp, penetration damp, condensation damp, and outlines their causes. The effects of dampness include aesthetic issues, dry rot, corrosion, and health hazards. Remedial measures discussed include damp proof courses, waterproofing, and special techniques. Practical advice is given to reduce excessive moisture through proper ventilation and drainage, and timely repairs.
The document discusses common construction defects in buildings such as cracks and dampness. It defines construction defects and lists main causes as application of forces, effects of materials, temperature changes, and biological agents. Common cracks are categorized based on width and appearance. Cracks are further divided into structural and non-structural types. Main causes of cracks are identified as drying shrinkage, thermal movement, elastic deformation, creep, chemical reactions, foundation movement, and vegetation growth. Specific defect examples and their causes are outlined, such as cracks in brickwork from lack of tying and defective flashing. Remedies for preventing common defects are also provided.
The document summarizes various types of biological and mechanical damage that can affect buildings over time. It discusses how fungi, insects, plants, animals, and environmental factors can deteriorate building materials when conditions are suitable. It also outlines different mechanical stresses like wear and tear from use, vibration, shocks, and thermal expansion/contraction that gradually break down structures. The key message is that proper design and maintenance are needed to prevent defects and extend building lifespan by mitigating destructive biological growth and movement stresses.
In this presentation, FMC's Karen Groulx discusses the recent incidents of falling glass condominium balconies in Toronto.
This presentation contains examples of the kinds of issues companies dealing with similar issues could face. If you are faced with one of these issues, please retain professional assistance as each situation is unique.
This document discusses various causes and types of dampness that can occur in buildings. It describes rising damp, which occurs when water rises up walls through capillary action from the soil. To prevent this, damp-proof courses (DPCs) made of impervious materials like slate or bitumen felt are installed. Deterioration or bridging of the DPC can lead to dampness. Hygroscopic salts in rising damp water can also cause issues by continuing to attract moisture after repairs. The document also discusses penetrating dampness from external water entering walls, condensation dampness caused by high humidity and ventilation issues, and bridging of cavity walls. Treatments include replacing or injecting new DPCs, drainage improvements,
The document discusses various types of building construction defects such as fungal stains, erosion of mortar joints, peeling paint, defective plastered renderings, cracking walls, decayed floorboards, insect attacks, roof defects, dampness penetration, unstable foundations, and poor installation of air conditioning units. It provides details on the causes and symptoms of each type of defect.
How we prevent our home in rainy seasonMuhammad Ali
Dampness in buildings can occur due to poor design, faulty construction, or use of low quality materials. It allows moisture to penetrate through the roof, walls, or floors. This can lead to mold growth and unpleasant smells, causing respiratory issues for occupants. It also causes structural defects like efflorescence, plaster crumbling, paint flaking, and timber rotting. Dampness prevention methods include proper ventilation, dehumidifiers, avoiding storing items on roofs, using waterproofing treatments on surfaces, special construction techniques like thick walls and damp-proof courses, and integral treatments for concrete or mortar.
Buildings decay for several reasons: climatic issues like sunlight, moisture, wind, and temperature fluctuations cause fading, cracking, erosion, and structural stress; botanical issues like plants growing in walls absorb moisture and cause damage; atmospheric pollution from industry and vehicles accelerates the natural weathering process. Poor construction, improper repairs, and neglect of maintenance also contribute to building failures over time.
This document discusses various types of building defects. It begins by defining building defects and noting that they can occur in both new and old buildings. It then categorizes defects into structural and non-structural. Some common structural defects include cracks, steel corrosion, and deflection. Non-structural defects include issues with brickwork, dampness, and plaster. The document also lists several specific defects like wall cracks, peeling paint, dampness, and roof defects. It provides examples of different types of wall cracks and their potential causes, such as foundation movement, thermal effects, chemical reactions, and shrinkage. Prevention techniques are also outlined.
Common building defects include defective concrete that causes spalling or loose plaster, water seepage through external walls or ceilings, and structural cracks in walls, columns, and beams. Defects can be caused by aging materials, water leakage, overloading, corrosion, or poor construction practices. Defects in building services like plumbing, electricity, fire systems and HVAC can also occur and result in issues like water or electrical problems, non-functioning alarms, or inadequate heating or cooling. Identifying the source of water seepage, which can occur through roofs, ceilings, or external walls, often requires extensive investigation. Regular inspection and maintenance is needed to monitor for defects.
This document discusses building defects diagnostics. It provides information on investigating specific defects, including rising damp and cracks in walls. Techniques for defect investigation are outlined, such as using moisture meters and temperature/humidity recorders. Factors that can cause internal wall defects like improper support or additions that increase loading are explained. The causes of cracks in external and internal walls are also covered.
This document discusses various construction defects caused by dampness and applied forces. It describes defects like cracks in walls due to differential settlement from soil moisture changes or structural overloading. It also discusses defects from lack of expansion joints in walls, issues where rigid slabs meet load-bearing walls without slip joints, and rising dampness from lack of damp proofing. Remedies include proper drainage, deep foundations, avoiding overloading, and installing damp proof courses.
Michael Parrett concludes his series on diagnosing causes of dampness in buildings. He discusses common issues with cast iron gutters and rainwater pipes such as lack of paint protection leading to corrosion. Drainage design is also important to properly discharge rainwater from roofs. Defective water mains frequently cause damp issues, with leaking pipes sometimes running under buildings and causing damage. A holistic approach is needed to properly diagnose the source of dampness which can have various causes beyond just a failed damp proof course.
The document discusses various common defects seen in building construction such as cracks within structures, dampness defects, and poor workmanship. It provides 11 examples of cracking within structures like diagonal cracks in brick walls, horizontal cracks in mortar joints, random cracks in flooring, and cracks at joints between concrete and masonry. It also discusses 4 cases of dampness defects including dampness in ceilings from roof leaks and seepage in walls. Finally, it briefly mentions one example of poor workmanship - cracks in brickwork due to lack of proper tying-in. The document provides detailed causes and remedies for each of the discussed construction defects.
The document discusses various types of construction defects such as cracks within structures and dampness defects. It provides 11 examples of cracking problems within structures like diagonal cracks in brick walls, horizontal cracks in mortar joints, random cracks in flooring, and cracks at joints between concrete and masonry. Each problem is described in terms of its causes and recommended remedies. It also discusses one example of a dampness problem involving dampness in ceilings below roof slabs, terraces or balconies and lists 6 potential causes such as improper roof slopes, choked rainwater pipes, lack of waterproofing of overhead tanks, and improper waterproofing treatment.
Architects toronto res. part i renovationRoyce LaNier
The document summarizes renovations done to an architect's Toronto residence between 2014 and 2016. The interior was gutted and even floors and joists were removed and replaced in stages. Excavation, underpinning, waterproofing, and insulation work was done, along with installing under-floor hot water heating. Exterior work included adding new masonry openings, windows, and doors. New floors, joists, and subflooring were installed along with interior partitions. The third floor was rebuilt by removing floor joists and the rear section of the roof to allow for new floor joists, subfloor, exterior wall, roof, and interior partitions.
The role of_absorbent_building_materials_in_moderaErangaPrasad
This document discusses using absorbent building materials to moderate changes in indoor relative humidity. It presents an experimental climate chamber that controls water vapor flux instead of relative humidity. A variety of common building materials were tested for their ability to buffer indoor humidity, including brick, wood, earth, lime mortar and gypsum. The best performing materials were wood oriented with grain perpendicular to exposure and a specially developed bentonite/perlite mixture. Absorbent walls can effectively buffer daily and even annual humidity variations in low-exchange buildings like archives. Absorbent materials can also be combined with mechanical HVAC to provide simpler and more stable humidity control in buildings requiring ventilation, like museums.
This document discusses several common types of building defects, including cracks in walls, peeling paint, dampness, and timber decay. It describes the causes, symptoms, and categories of each defect. Cracks in walls can be caused by settling, movement, or changes in temperature/moisture. Peeling paint results from improper surface preparation or moisture issues. Dampness occurs from sources like rain, condensation, rising groundwater, or leaks. Timber decay is caused by biological factors like fungi or insects attacking wood. The document provides details on evaluating and classifying the severity of wall cracks, as well as visual examples of several defect types.
Dampness in buildings can cause health issues and damage to the structure. It is caused by factors like rain penetration, soil drainage issues, and defective construction. Remedies include installing damp proofing courses of flexible or rigid materials at locations like foundation level, parapets, and windowsills. Proper ventilation and moisture management can also help reduce excessive moisture in homes.
This document discusses construction defects and their remedies. It outlines various types of cracks that can develop in buildings, including structural and non-structural cracks caused by moisture, temperature changes, chemical reactions, ground movement and vegetation. Specific types of dampness like penetrating damp and rising damp are explained. Symptoms of dampness include mold growth, deterioration of plaster and paint, and staining of surfaces. The identification and treatment of damp problems is covered, focusing on fixing the cause like drainage issues or leaky pipes, installing a damp proof course, and repairing affected areas.
KEIM mineral paints are a Bavarian invention from 130 years ago that uses potassium silicate solution combined with inorganic pigments to produce a paint that penetrates and chemically bonds with the substrate. Buildings painted with KEIM paints in the 19th century are still in excellent condition today due to the paints becoming an integral part of the surface rather than just forming a skin. KEIM paints offer superior performance, durability, protection and color fastness due to forming a chemical bond with the substrate.
This document discusses the importance of air tightness in buildings. It defines key terms like infiltration, exfiltration, and building envelope. Having an air tight building envelope can improve energy efficiency and occupant comfort by reducing air leakage. Leaky buildings can increase energy costs and accelerate issues like mold growth. The document recommends methods for improving air tightness during design, construction, and testing, such as using air tight materials and sealing openings and penetrations.
The document provides information on curtain walls, including what they are, common materials used like aluminum and glass, typical structural elements, and advantages and disadvantages. It discusses two case studies - the Hallidie Building in California from 1917, one of the earliest uses of a glass curtain wall, and the Lever House in New York from 1951, an influential early glass skyscraper. Key points covered include how curtain walls are non-load bearing but keep weather out, their lightweight aluminum framing, different installation methods, and benefits of natural lighting control and views.
The document discusses common defects found in buildings such as cracks and dampness. It categorizes defects into pre-construction, during construction, and post-construction. Cracks can be structural or non-structural, and are caused by factors like drying shrinkage, thermal movement, elastic deformation, creep, chemical reactions, and foundation issues. Dampness is usually due to penetrating damp from gaps or rising damp without a proper damp proof course. Preventive measures include proper design, materials, construction practices, and addressing the root causes of defects.
How we prevent our home in rainy seasonMuhammad Ali
Dampness in buildings can occur due to poor design, faulty construction, or use of low quality materials. It allows moisture to penetrate through the roof, walls, or floors. This can lead to mold growth and unpleasant smells, causing respiratory issues for occupants. It also causes structural defects like efflorescence, plaster crumbling, paint flaking, and timber rotting. Dampness prevention methods include proper ventilation, dehumidifiers, avoiding storing items on roofs, using waterproofing treatments on surfaces, special construction techniques like thick walls and damp-proof courses, and integral treatments for concrete or mortar.
Buildings decay for several reasons: climatic issues like sunlight, moisture, wind, and temperature fluctuations cause fading, cracking, erosion, and structural stress; botanical issues like plants growing in walls absorb moisture and cause damage; atmospheric pollution from industry and vehicles accelerates the natural weathering process. Poor construction, improper repairs, and neglect of maintenance also contribute to building failures over time.
This document discusses various types of building defects. It begins by defining building defects and noting that they can occur in both new and old buildings. It then categorizes defects into structural and non-structural. Some common structural defects include cracks, steel corrosion, and deflection. Non-structural defects include issues with brickwork, dampness, and plaster. The document also lists several specific defects like wall cracks, peeling paint, dampness, and roof defects. It provides examples of different types of wall cracks and their potential causes, such as foundation movement, thermal effects, chemical reactions, and shrinkage. Prevention techniques are also outlined.
Common building defects include defective concrete that causes spalling or loose plaster, water seepage through external walls or ceilings, and structural cracks in walls, columns, and beams. Defects can be caused by aging materials, water leakage, overloading, corrosion, or poor construction practices. Defects in building services like plumbing, electricity, fire systems and HVAC can also occur and result in issues like water or electrical problems, non-functioning alarms, or inadequate heating or cooling. Identifying the source of water seepage, which can occur through roofs, ceilings, or external walls, often requires extensive investigation. Regular inspection and maintenance is needed to monitor for defects.
This document discusses building defects diagnostics. It provides information on investigating specific defects, including rising damp and cracks in walls. Techniques for defect investigation are outlined, such as using moisture meters and temperature/humidity recorders. Factors that can cause internal wall defects like improper support or additions that increase loading are explained. The causes of cracks in external and internal walls are also covered.
This document discusses various construction defects caused by dampness and applied forces. It describes defects like cracks in walls due to differential settlement from soil moisture changes or structural overloading. It also discusses defects from lack of expansion joints in walls, issues where rigid slabs meet load-bearing walls without slip joints, and rising dampness from lack of damp proofing. Remedies include proper drainage, deep foundations, avoiding overloading, and installing damp proof courses.
Michael Parrett concludes his series on diagnosing causes of dampness in buildings. He discusses common issues with cast iron gutters and rainwater pipes such as lack of paint protection leading to corrosion. Drainage design is also important to properly discharge rainwater from roofs. Defective water mains frequently cause damp issues, with leaking pipes sometimes running under buildings and causing damage. A holistic approach is needed to properly diagnose the source of dampness which can have various causes beyond just a failed damp proof course.
The document discusses various common defects seen in building construction such as cracks within structures, dampness defects, and poor workmanship. It provides 11 examples of cracking within structures like diagonal cracks in brick walls, horizontal cracks in mortar joints, random cracks in flooring, and cracks at joints between concrete and masonry. It also discusses 4 cases of dampness defects including dampness in ceilings from roof leaks and seepage in walls. Finally, it briefly mentions one example of poor workmanship - cracks in brickwork due to lack of proper tying-in. The document provides detailed causes and remedies for each of the discussed construction defects.
The document discusses various types of construction defects such as cracks within structures and dampness defects. It provides 11 examples of cracking problems within structures like diagonal cracks in brick walls, horizontal cracks in mortar joints, random cracks in flooring, and cracks at joints between concrete and masonry. Each problem is described in terms of its causes and recommended remedies. It also discusses one example of a dampness problem involving dampness in ceilings below roof slabs, terraces or balconies and lists 6 potential causes such as improper roof slopes, choked rainwater pipes, lack of waterproofing of overhead tanks, and improper waterproofing treatment.
Architects toronto res. part i renovationRoyce LaNier
The document summarizes renovations done to an architect's Toronto residence between 2014 and 2016. The interior was gutted and even floors and joists were removed and replaced in stages. Excavation, underpinning, waterproofing, and insulation work was done, along with installing under-floor hot water heating. Exterior work included adding new masonry openings, windows, and doors. New floors, joists, and subflooring were installed along with interior partitions. The third floor was rebuilt by removing floor joists and the rear section of the roof to allow for new floor joists, subfloor, exterior wall, roof, and interior partitions.
The role of_absorbent_building_materials_in_moderaErangaPrasad
This document discusses using absorbent building materials to moderate changes in indoor relative humidity. It presents an experimental climate chamber that controls water vapor flux instead of relative humidity. A variety of common building materials were tested for their ability to buffer indoor humidity, including brick, wood, earth, lime mortar and gypsum. The best performing materials were wood oriented with grain perpendicular to exposure and a specially developed bentonite/perlite mixture. Absorbent walls can effectively buffer daily and even annual humidity variations in low-exchange buildings like archives. Absorbent materials can also be combined with mechanical HVAC to provide simpler and more stable humidity control in buildings requiring ventilation, like museums.
This document discusses several common types of building defects, including cracks in walls, peeling paint, dampness, and timber decay. It describes the causes, symptoms, and categories of each defect. Cracks in walls can be caused by settling, movement, or changes in temperature/moisture. Peeling paint results from improper surface preparation or moisture issues. Dampness occurs from sources like rain, condensation, rising groundwater, or leaks. Timber decay is caused by biological factors like fungi or insects attacking wood. The document provides details on evaluating and classifying the severity of wall cracks, as well as visual examples of several defect types.
Dampness in buildings can cause health issues and damage to the structure. It is caused by factors like rain penetration, soil drainage issues, and defective construction. Remedies include installing damp proofing courses of flexible or rigid materials at locations like foundation level, parapets, and windowsills. Proper ventilation and moisture management can also help reduce excessive moisture in homes.
This document discusses construction defects and their remedies. It outlines various types of cracks that can develop in buildings, including structural and non-structural cracks caused by moisture, temperature changes, chemical reactions, ground movement and vegetation. Specific types of dampness like penetrating damp and rising damp are explained. Symptoms of dampness include mold growth, deterioration of plaster and paint, and staining of surfaces. The identification and treatment of damp problems is covered, focusing on fixing the cause like drainage issues or leaky pipes, installing a damp proof course, and repairing affected areas.
KEIM mineral paints are a Bavarian invention from 130 years ago that uses potassium silicate solution combined with inorganic pigments to produce a paint that penetrates and chemically bonds with the substrate. Buildings painted with KEIM paints in the 19th century are still in excellent condition today due to the paints becoming an integral part of the surface rather than just forming a skin. KEIM paints offer superior performance, durability, protection and color fastness due to forming a chemical bond with the substrate.
This document discusses the importance of air tightness in buildings. It defines key terms like infiltration, exfiltration, and building envelope. Having an air tight building envelope can improve energy efficiency and occupant comfort by reducing air leakage. Leaky buildings can increase energy costs and accelerate issues like mold growth. The document recommends methods for improving air tightness during design, construction, and testing, such as using air tight materials and sealing openings and penetrations.
The document provides information on curtain walls, including what they are, common materials used like aluminum and glass, typical structural elements, and advantages and disadvantages. It discusses two case studies - the Hallidie Building in California from 1917, one of the earliest uses of a glass curtain wall, and the Lever House in New York from 1951, an influential early glass skyscraper. Key points covered include how curtain walls are non-load bearing but keep weather out, their lightweight aluminum framing, different installation methods, and benefits of natural lighting control and views.
The document discusses common defects found in buildings such as cracks and dampness. It categorizes defects into pre-construction, during construction, and post-construction. Cracks can be structural or non-structural, and are caused by factors like drying shrinkage, thermal movement, elastic deformation, creep, chemical reactions, and foundation issues. Dampness is usually due to penetrating damp from gaps or rising damp without a proper damp proof course. Preventive measures include proper design, materials, construction practices, and addressing the root causes of defects.
AIC Stony Brook Carriage Storage Sheds Paper (Stony3C.Txt)Garrison/Lull Inc.
PRACTICAL SOLUTIONS FOR CARRIAGE STORAGE: THE STONY BROOK CARRIAGE SHED PROJECT
Paper complied from three papers presented at the AIC Annual Meeting Wood
Artifacts Group on 11 June 2000 with Jonathan Taggart & Merri Ferrell
The document discusses different HVAC distribution schemes and typical HVAC distribution systems. It describes all-water, air-water, and all-air distribution types based on how spaces are served. It then lists and includes images of single zone, 2-pipe fan-coil, 4-pipe fan-coil, constant volume reheat, dual-duct, multizone, and variable air volume as common HVAC distribution systems.
AIC Corrosion Coupon Paper, 1995 (Coupon6.Txt With Graphs)Garrison/Lull Inc.
- Corrosion coupons exposed for longer periods (e.g. 9 months) showed lower corrosion levels than shorter exposures (e.g. 30-60 days), calling into question the ability to accurately pro-rate long exposures.
- "Sister" coupons exposed together in the same location often showed significantly different corrosion results, suggesting lack of repeatability. Higher VOC levels may contribute to disparity between sister coupons.
- For more consistent results, it is recommended to expose coupons for 90 days and use multiple coupons per location, as shorter or longer exposures and single coupons can produce unreliable data.
This document summarizes a study of CEO succession events among the largest 100 U.S. corporations between 2005-2015. The study analyzed executives who were passed over for the CEO role ("succession losers") and their subsequent careers. It found that 74% of passed over executives left their companies, with 30% eventually becoming CEOs elsewhere. However, companies led by succession losers saw average stock price declines of 13% over 3 years, compared to gains for companies whose CEO selections remained unchanged. The findings suggest that boards generally identify the most qualified CEO candidates, though differences between internal and external hires complicate comparisons.
The award-winning Museum of Scottish Country Life has opened in East Kilbride, attracting visitors. It features a historic working farm with farmhouse, buildings, and land. The museum was a collaboration between the National Museums of Scotland and the National Trust for Scotland. It houses collections on country life and from the Reid family. The new exhibition building uses passive design to maintain stable temperatures and humidity without excessive energy use.
Sustainable Design Part Two: Climate Related IssuesTerri Meyer Boake
What is Sustainable Design Part Two: Climate Related Issues looks at the bioclimatic regions and how they affect the approach to environmental building design. This also looks at the comfort zone as a way to reduce energy consumption.
DIVYA BALANI PRESENTATION ON ROLE AND INFLUENCE OF NATURAL CLIMATE ON INTERIO...DivyaBalani7
This document discusses the significance of climatology in interior design. It covers several key topics:
- Architectural climatology studies how climatic elements like temperature, humidity, and wind impact buildings and occupants.
- Passive solar design orients buildings and incorporates design features to benefit from sunlight and reduce energy needs.
- Daylighting uses windows, skylights, and reflective surfaces to provide natural interior lighting.
- Ventilation and moisture control are important for occupant comfort and preventing issues like mold growth. Noise control also improves occupant comfort.
- Considerations like orientation, landform, vegetation, and passive techniques can optimize buildings for the local climate and conditions. Proper design is crucial for
Bioclimatic design at the site planning scaleKomal Arora
Bioclimatic design aims to create buildings and spaces that meet energy needs without harming the environment. It focuses on integrating architectural design with local climate conditions like sunlight, wind and vegetation. Key principles include considering the local weather, reducing energy usage, and using passive solar heating and natural ventilation. Examples of bioclimatic design techniques at the site planning scale include using landforms and plants for wind protection, shading, and directing summer breezes to naturally condition outdoor spaces and buildings.
Sustainable site selection and development. Simple passive design considerations involving site
conditions, building orientation, plan form and building envelope for sun and wind.
Passive heating of buildings- direct, indirect and isolated gain.
Passive cooling of buildings – shading of buildings, insulation, induced ventilation (air vents, wind
tower, etc.,), radiative cooling, evaporative cooling, earth coupling, dessicant cooling.
This document discusses vapor barriers and provides recommendations for building enclosures based on climate. It defines key terms like vapor retarder and proposes a classification system. The main points are:
1) Vapor barriers are intended to retard vapor migration while air barriers retard air movement. Confusion exists between the two.
2) Incorrect use of vapor barriers can prevent assemblies from drying out, leading to moisture problems.
3) Recommendations for building enclosures are provided for different climates and construction types to encourage drying and avoid trapping moisture.
4) Key principles include avoiding double vapor barriers, interior vapor barriers in conditioned spaces, and vapor-impermeable finishes that can trap moisture.
drainage capabilities and heat loss of different inverted roof assembliesAmiran Bokhua
The document summarizes research conducted to evaluate the drainage capabilities and heat loss of different inverted roof assemblies. Tests were performed using a calibrated hot box to simulate winter temperature conditions. Various inverted roof assemblies were tested that included different drainage layer configurations, insulation orientations, and gaps between insulation boards. Test results showed that the majority of rainwater drained at the membrane level regardless of assembly configuration. Introducing gaps between insulation boards increased drainage rates. Assembly configuration was also found to impact the overall effective thermal performance, with increased heat loss observed when the drainage layer was removed and insulation was in direct contact with the roof membrane.
The document discusses building envelopes and energy conservation in buildings. It defines a building envelope as the outer shell that maintains indoor climate control. Properly designing, constructing, and maintaining the building envelope prevents air and water infiltration. The purposes of the building envelope include water resistance, air flow control, and serving as a thermal envelope. Passive solar systems operate without external devices by using solar energy captured through windows. Active solar systems use collectors and storage to capture solar heat and transfer it within a building. The document also discusses types of energy used in commercial buildings and embodied energy in building materials and construction processes. Building automation and management systems aim to efficiently control building operations and reduce energy consumption and costs.
150316 principles of solar oriented designTieng Wei
Principles of Solar Oriented Design, that would help in designing the building in term of active and passive solar design strategies. It's a group assignment, thus, credits go to my group members too.
Brighter Home Solutions windows are individually made to order for a perfect fit rather than being prefabricated units delivered from stock. That is why such care is taken at the design and survey stages to ensure that all measurements are accurate and each element of your requirements taken into account.http://www.brighterhomesolutions.co.uk/windows.html
Climatology is the study of climate elements like temperature, humidity, wind etc and their impact on architecture. Architectural climatology involves studying how climate affects human comfort and designing the built environment accordingly. Key considerations include site planning based on topography, passive solar design, daylighting, ventilation, moisture control and noise control. Design strategies aim to benefit from positive climate elements while mitigating negative impacts through techniques like insulation, absorption, damping, isolation and appropriate material selection.
The document discusses principles of tropical architecture and design through two case studies - the Belarocca Island Resort in the Philippines and a house in Maui, Hawaii. It outlines how these projects utilize passive design elements like orientation, ventilation, shading and natural materials to promote thermal comfort without mechanical cooling. Key strategies include maximizing air flow, removing hot air via convection currents, and using vegetation for shade and fresh air.
a case study of two architectural tropical designs. The case study of Belarocca island resort in Marinduque, Philippines and the house in Maui, Hawaii.
Bart Meehan: Sustainably Designed Buildings at the Australian National Univer...ISCN_Secretariat
The document summarizes the history of sustainably designed buildings at the Australian National University (ANU) from the mid-1990s to present day. It describes several buildings constructed at ANU that incorporated innovative passive design features to reduce energy and water usage and environmental impact, such as natural ventilation, rainwater harvesting, and solar power generation. These buildings showed that sustainably designed structures were no longer dependent on high energy costs, paving the way for modern green building movements.
The document discusses the history and design of courtyard houses around the world. Courtyard houses have been used for over 4,500 years, originating in the Middle East. They provide enclosed outdoor space for activities while maintaining privacy. Key features include using the central courtyard to provide ventilation, light, and a communal gathering space. Courtyard designs have been popular in cultures from ancient Rome and China to modern developments in California and New Zealand. Courtyard houses are gaining new popularity for their energy efficiency and use of space.
The document describes building design techniques for hot, dry climates. It discusses traditional courtyard houses with surrounding rooms that enclose an outdoor space for shade. Wind towers called "badgirs" are also described, which capture cooler winds at the top and distribute air through enclosed rooms. Different types of walls and roofs that provide thermal insulation and reflect solar radiation are outlined, such as cavity walls, radiant barriers, and double-skinned designs with ventilated layers.
The document provides information about a ventilation problem in a heritage building and discusses potential solutions. It includes:
1) An introduction that defines ventilation and its importance, and describes natural and mechanical ventilation. It also defines what constitutes a heritage building.
2) Details about the installation process and types of windows and doors used in heritage buildings like the Forbidden City and Westminster Abbey, including clerestory windows, stained glass windows, wooden doors, and ventilating lamps.
3) A discussion of the advantages and disadvantages of natural ventilation in heritage buildings, noting benefits like aesthetics, energy efficiency and adaptability, but also challenges like inconsistent indoor environments.
Waterproofing Challenges and Suggested Remedial measures for High Rise Buildi...IJSRD
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1. This paper was presented at 1993 AIC Meeting in Denver. Mr. Lull's
presentation at the 1993 annual meeting also discussed renovations to the
Pinkney House at the Kern County Museum in Bakersfield, California. A paper
on that project may be found in the Objects Specialty Group Postprints 1991,
Volume One, pages 102-107.
===============================================================================
Recent Planning Experience in Balancing Collection and Building Preservation
-----------------------------------------------------------------------------
Needs: Improvements to the Mercer Museum
----------------------------------------
William P. Lull
ABSTRACT
The improvement of the collection environment in the Mercer Museum in
Doylestown, Pennsylvania, presents several unique challenges. These include
an historic solid concrete building; no present heating, cooling or humidity
control; an environmentally sensitive collection; little hope of installing
a ducted air system; and problems with condensation, high light levels and
water leaks. The Museum developed a multi-disciplinary approach under an
IMS grant to address these problems. Working independently, the original
precept of the consultants at the time of the grant application was to
develop a scheme of humidity-controlled heating to reduce high humidity
conditions. However, when the consultants met for the on-site meeting after
inspection of the building a different approach was developed that would be
less intrusive to the building fabric and more consistent with other
treatments. The solutions identified included interior window treatments
for light and condensation control, improvements to the exterior building
details, and improvements to the operable windows and ventilation.
Contingencies were developed for modest humidity-controlled heating and
increased ventilation in the event that the other treatments proved
inadequate to control the high humidity and high temperature problems.
1. INTRODUCTION
The main building at the Mercer Museum is an important part of the Museum
collection. It no only holds the bulk of Mr. Mercer's original collection
but is itself an artifact of early poured-in-place concrete construction.
It distinguishes itself as a building originally intended to be a Museum and
built in the form of a castle, is an important landmark for the area. The
building has problems in the collection environment it provides for the
collection. While there are some inherent benefits to the building as an
unconditioned space it has some environmental problems, primarily high
humidity, high temperatures and water leaks. To address this complex
problem the Museum, under the supervision of Mr. Cory Amsler, Curator of
Collections, assembled a multi-disciplinary team under an IMS grant. The
collection needs were represented by Kory Berrett, Berrett Conservation
Studio, the building needs were represented by Dale Frens, Frens and Frens
Architects, and the environmental control planning was developed by William
Lull, Garrison/Lull.
2. 2. COLLECTIONS ENVIRONMENT OBSERVATIONS AND EVALUATION
This section describes the existing conditions of the collection environment
to provide a context for the past environment of the collection, the
environmental evaluation, and the need for the improvements.
ARCHITECTURAL/GENERAL. The main building at the Mercer Museum is built of
poured-in-place concrete. It has an exposed concrete roof with no roof
membrane. The windows are mostly fixed sash consisting of cast concrete
frames emulating double-hung windows. A few windows are operable wooden
frames opened for ventilation.
COLLECTIONS DISPLAY AND STORAGE. The collections are stored and displayed
in two basic methods. Many of the large pieces are open to the general
space where air may freely circulate and where visitors may view the objects
from many sides. Most other parts of the collection on display are shown in
closed display rooms located around the perimeter of the building. These
rooms usually have an exterior exposure, usually with a window, and an
interior wall with a window for visitors to view the objects. Some of these
rooms are hardly larger than a display case while others are complete rooms.
Most storage of the collection is in similar closed rooms away from visitor
view.
HUMIDITY TOLERANT ENVELOPE. The building is single-glazed and the walls and
roof apparently have no cavities or other heterogeneous aspects to their
construction; they are simply solid concrete. Since the building is not
heated and humidified the classic condensation conditions of a warmed
humidified interior exposed to a cold building envelope would not be
expected to occur; however, the high thermal mass of the concrete and ready
translation of outside conditions to inside apparently allows conditions to
occur that lead to condensation on the glass and window frames.
HVAC SYSTEM INFRASTRUCTURE. The building has no HVAC distribution
infrastructure. The only air handling system in the building is the smoke
exhaust system in the south tower which is used for summer ventilation.
This is controlled on a subjective basis when the weather is hot by turning
on the fan using a timer. There are no other methods for cooling,
heating/reheat, humidification, dehumidification, filtration or other
tempering of the building environment. The museum complex has hot water
heating boilers but these serve other buildings.
3. PROBLEMS
The following problems directly relate to the effect of the environment on
the collection. They are generally based on the previous collection survey
reports by conservators and the on-site discussions of the project team.
CONDENSATION STAINING. One of the major problems is condensation on the
interior of the concrete frame windows. The Museum staff notes that this
"usually occurs when a cool night follows a warm day." It was observed on
the sixth floor west windows at the time of the September site visit and is
generally characterized by the staff as occurring on the east and west sides
of the building. Staining from condensation runoff is apparent at most
windows which may be eroding the concrete. In very cold weather the Museum
staff reports the condensation can form ice.
3. COLLECTION SPOTTING. Collection objects kept near the windows show surface
spotting and staining which is apparently due to condensation at the
windows.
PARTICULATE CONTAMINATION. As noted by previous project conservators there
is a clear level of particulate contamination a portion of which is
suspected as coming from the exposed interior concrete surfaces. The
particulate observed in the collection areas at the was generally
lightweight with some soot. The lightweight matter was suspected as coming
from the collection or the museum visitors.
Analysis of samples was performed to determine how much of the particulate
is from the concrete structure itself. The 23 December 1992 analysis by Dr.
George Segan Wheeler concluded "the particulates derive primarily from the
cement which is probably degrading by infiltration of water from the
exterior." That report indicates that most of the particles were in the
size of 4 to 80 microns with 20 to 30 microns average, with the fibers also
noted as "probably from the cement."
HUMIDITY CONDITIONS. Mr. Berrett identified a problem with occasional high
humidity conditions in winter and problems with occasional humidity
excursions of over 20% RH in all seasons. The open windows are suspected as
allowing outside weather conditions to be rapidly transmitted into the
building.
BROKEN/LEAKY OPERABLE SASHES. Several of the operable windows are broken or
their sashes do not seal well. This allows in the infiltration of moist air
and some water when it rains since these are casement windows.
RAIN LEAKS. There are several isolated places noted by the staff where rain
leaks into the building. This not only poses a long-term threat to the
building but increases the internal high humidity problems.
TEMPERATURE CONDITIONS. Mr. Berrett noted that summer high temperatures
were most problematic on the fifth and sixth floors in the areas with poor
ventilation. The ventilation is currently limited to the operable windows.
LIGHT EXPOSURE. Mr. Berrett identified light exposure problems from the
several windows.
4. TEAM APPROACH
Working independently, the original precept of the consultants at the time
of the grant application was to develop a scheme of humidity-controlled
heating to reduce high humidity conditions, using a temporary mock-up of the
heating scheme as a test. However, when the consultants met for the on-site
meeting after inspection of the building a different approach was developed.
Mr. Berrett's priorities for improving the environment were listed along
with Mr. Frens' planned treatments for preservation of the building and Mr.
Lull's possible environmental control treatments. Priority was placed on:
a) isolating the interior environment from exterior humidity extremes, b)
controlling condensation, c) ventilating for high temperatures at the upper
floors, d) controlling particulates, and e) reducing daylit light levels.
Mr. Frens was able to offer several passive treatments he would otherwise
suggest for preservation of the building that could lead to improvements for
4. the interior environment, including treatment of the building envelope to
address water leaks and rebuilding of the operable windows used for
ventilation. Mr. Lull helped the team identify the limitations of the
existing structure for supporting not only a conventional HVAC system but
even a humidity-controlled heating system to reach all the spaces; virtually
any ducted air system would be physically, historically and aesthetically
intrusive and yet would be required to provide air to condition the closed
display rooms, called "glazed alcoves" by Mr. Mercer, which are key to the
museum display program. Window condensation was addressed through planned
secondary interior glazing to prevent the interior moisture from reaching
the cold panes of glass. This also provided the opportunity for using
tinted glazing to reduce light levels and glare for the collection on
display. Improved ventilation would be provided to address the heat gain at
the upper floors.
Since the performance of many of these improvements could not be readily
quantified backup plans were developed for dealing with high temperatures
and high humidity. If temperatures were still too high an increased
ventilation scheme was developed. If humidity levels were still too high in
cool weather humidity-controlled heating can be provided through the use of
the original tunnel under the main floor which many speculate was intended
by Mr. Mercer for steam heating pipes .
The important aspects of the plan were the use of treatments that were
otherwise indicated for preservation of the building, and the selection of
passive techniques which would not require any permanent intrusion or
modification to the building. No major energy costs would be incurred
allowing the improvements to have a minimum impact on the museum's operating
budget. The contingency of using central humidity-controlled heating, while
having a possible significant energy cost, was confined to a tunnel which
would again cause no changes to the building's historic fabric and any leaks
from the new system could not reach collection areas.
DISQUALIFIED TREATMENTS. The following possible treatments to address the
humidity and particulate problems were identified but disqualified by the
project team. In many cases, as indicted, (*) this was due to a requirement
for installation of a ducted air system.
1. DEHUMIDIFICATION.* High humidity could be reduced in summer through the
use of a central dehumidification system. Mr. Lull pointed out that
local dehumidifiers in rooms might require additional electric power
distribution within the building, and that responsible use of them would
require provision of a condensate pumping and removal system. He
pointed out that they would also increase and decentralize the fire risk
in the building and would have a significant energy cost.
2. FILTRATION.* The smaller air borne particulates could be filtered out
of the air through the use of a central filtration system. Mr. Lull
indicated that this would have had a significant increase in annual
energy costs.
3. AIR-CONDITIONING.* High temperatures could be addressed through
conventional cooling which might also serve some or all of the
dehumidification functions. Mr. Lull indicated that this would have had
a dramatic increase in annual energy costs.
4. CLEANING OF CONCRETE. The interior exposed surfaces of concrete could
5. be cleaned to remove any particulates present on the surface. Mr. Lull
suggested a HEPA-rated vacuum be used to assure all particulates were
caught. The preponderance of the project team felt that the dust
analysis indicated this was not necessary as a formal project and could
be addressed as a general staff activity with normal vacuums.
5. MAIN ROOF MEMBRANE. If the patching and/or sealants used in the repair
of leaks proves ineffective in making the main roof weather tight then a
roof membrane might be needed, although this would not be historically
accurate. This might cause a problem with condensation on the underside
of the new membrane depending on outside temperatures, inside
temperature records and conditions for balanced vapor flow to avoid
condensation. Mr. Frens indicated that the roof problems related
primarily to edge and boundary conditions and not to water penetration
of the roof itself so a membrane would be of little benefit.
* This option generally requires a ducted air system or piping system. With
the preponderance of the collection located in closed or semi-closed rooms a
ducted air system would require duct penetrations through the poured
concrete walls and floors and an exposed duct system in the building.
Options based on all-water piped systems were similarly discarded since they
still required penetrations of the concrete and brought with them a great
risk from leaky and frozen pipes, and would pose an unmanageable maintenance
burden from the many small terminal devices to be maintained. Each of these
could also be expected to have significant energy costs, not only for the
fans to move the air but the operating costs for heating, dehumidification
and cooling.
5. CONSERVATION ENVIRONMENT IMPROVEMENTS
The following improvement plan was developed to address as many of the
problems as possible. They may have a significant cost and should generally
be designed by an architect and/or engineer. They are the improvements that
were developed with the project consultants to strike a balance between
improved environmental conditions, minimum impact on the structure of the
building and reasonable owning and operating cost implications for the
Museum.
1. CLEANING IMPROVEMENT. To deal with the particulate problem the
preponderance of the project team felt that the use of conventional
vacuum cleaning would be appropriate and that no special filtration
would be required since no particulates were found at the level that
would require a HEPA vacuum. For convenience in cleaning the collection
the vacuum should be the type that attaches to the waist with a belt.
2. REMOVE GLASS PANELS AND UNDERCUT DOORS. To promote air flow in the
various closed exhibit rooms the project team agreed with Mr. Berrett's
suggestion that one or more panels of glass be removed and that the
doors be undercut. This should be carefully done so that security of
the contents is preserved and might involve the use of heavy security
screens where necessary.
3. ACRYLIC PANELS FOR WINDOW CONDENSATION. The fixed-sash windows with
condensation problems should be considered for interior-applied
secondary glazing with acrylic panels. To be effective the panels need
to seal against the interior air reaching the original exterior window
6. glass. Since condensation apparently forms on the thin window frame
mullions and muntins the panel should preferably span the window,
applied to the thicker part of the wall. As reported by Mr. Berrett, to
reduce light level and glare the panels should be tinted. (See later
discussion of acrylic panel tests.)
4. REPAIR ENVELOPE LEAKS. The water leaks at various areas should be
repaired. This should include patching window problems, miscellaneous
wall conditions, a roof membrane for the balcony, and other conditions
determined by the restoration architect.
5. RENOVATED OPERABLE SASHES. The current operable sashes are often
broken, inoperative or ineffective in keeping rain out. The restoration
architect should consider redetailing the windows for more effective
seals and replacement of casement and sliding sash windows with awning
windows for better protection from rain ingress. All non-fixed sashes
should be made operable for current or future ventilation requirements.
(See next item.)
6. BETTER VENTILATION OF SUMMER HEAT GAIN AND HUMIDITY. The ventilation
system should be improved in its ability to address high temperature and
high humidity conditions. This would involve improving the ventilation
air discharge, thermostatic/humidistatic control of the ventilation, and
motorized damper operation of the renovated window sashes.
CONTINGENCY IMPROVEMENTS. These improvements are contingency improvements
in the event that the main improvements prove ineffective in meeting project
goals. These have not been identified as part of the main improvements
because they have a significant capital or operating cost, or are more
intrusive to the building fabric.
1. CENTRAL HUMIDITY-CONTROLLED HEATING. If the main improvements do not
provide sufficient control over high humidity conditions when the
temperature is low outside then humidity-controlled heating might be
used. While a ducted air distribution system might be too intrusive on
the historic structure, the building might be centrally heated with
steam, glycol/water or hot water piping located in the service tunnel
located below the floor in the main level. This area could be easily
served by piping running to a heat source to the north or south, and
would present little risk to the collection from leaks since it is below
collection levels. To enhance the heating effect the existing floor
grille might need to be opened up and additional grilles might need to
be added. Improvements to the tunnel might be necessary to improve
cleanliness, maintenance access and discourage pest ingress. The
control of such a system would need to avoid rapid temperature changes
and might need to seek a backward-averaged humidity level, rather than
be particularly responsive to acute conditions. This option would have
significant energy use implications.
2. IMPROVED CENTRAL VENTILATION. If the renovated windows and automatic
controls still prove inadequate for removal of summer heat (when outside
conditions are favorable) then further improvements should be considered
in the following order:
a. ADD EXHAUST FAN TO ALTERNATE TOWER. The other tower could be
equipped with a ventilation system similar to the existing system
7. except better suited for continuous duty. It should make full use
of the available window areas for exhaust louvers and should use a
fan capable of greater air flows at lower noise levels.
b. REPLACE EXISTING FAN SYSTEM. The existing fan system could be replaced
with a fan capable of greater air flows at lower noise levels.
This option would have significant energy use implications.
3. LOCAL FANS IN CLOSED AREAS. If the other improvements prove inadequate
to address condensation or mold problems in the closed exhibit alcoves
then fans might be used in them to increase air flow. With the fans
would come some additional energy use, additional maintenance, and added
risk of fire.
4. LOCAL HUMIDITY-CONTROLLED HEATING. Similar to the central system, this
would be the use of electric heaters in in the closed exhibit alcoves
with humidistats used for control in addition to thermostats. With the
heaters would come significant additional energy use, additional
maintenance, added risk of fire, and possibly the need to install
additional electric service to the rooms where it is used.
5. RECIRCULATED AIR. Mr. Berrett felt strongly that a central recirculated
air system be considered for destratification and improved air turnover
in the collection spaces for more even conditions and to suppress mold
growth. The application of this may ultimately be limited by the
available shaft space for vertical ducts inside the building. Creating
additional vertical shaft space is possible and options might include an
added exterior chase, an interior shaft created by penetrating a
vertical series of galleries, or a new exterior tower that might house
the shaft and new HVAC equipment. This option would have a significant
energy use implication, particularly if high velocity/high pressure air
distribution was required. A major advantage would be that such a
system might offer the opportunities for filtration, and for heating,
cooling and dehumidification at significant additional energy use.
6. INTERIOR CONCRETE SEALANT. A concrete sealant might be applied that
could help reduce the generation of particulates while also reducing the
infiltration of water vapor into the building from the concrete. Mr.
Frens indicated that it would be hard to find an effective sealant that:
a) would not change the appearance of the concrete, b) could be easily
reversed, c) that had a proven track record of performance, and d) that
would not need to be reapplied after a period of time, such as 10 years,
to renew its efficacy. The preponderance of the project team felt that
treatment of the concrete was not necessary to control the particulate
problem, which was attributed primarily to housekeeping, and was
otherwise an option of last resort.
ACRYLIC PANELS. A test of the possible treatment of the windows with
acrylic panels was performed by Mr. Frens. The panels were effective at
reducing light and UV levels while having very little impact to the
appearance of the building from the outside. The reduction of light
transmission was generally not noticed from the inside. There was a problem
with condensation within the cavity created by the application of the panel.
Although different panel types were tried including an application of a
panel with holes, each was plagued by moisture formation within the cavity
8. between the glazing surfaces. Two additional treatment option tests were
identified to prevent both surface and cavity condensation.
a. SEALED CONCRETE. The whole-window treatment might be tried again but
this time a strippable sealant, as suggested by Mr. Frens, might be used
on the exposed concrete to inhibit moisture migration into the cavity
between the glazing elements.
b. SINGLE-PANE PANELS. To reduce the exposure of concrete in the cavity
between the glazing elements the acrylic panels could be applied to each
window pane instead of the whole window. To eliminate the exposure of
concrete the acrylic panels could be applied with a glazing tape that
would at once seal the concrete at the edge of the window pane and hold
the acrylic panel in place. This treatment test should include summer
conditions to be sure there will be no "popping-off" effect, expansion
damage or other problems due to dimensional change in the acrylic panel
as it warms and cools. To help avoid this the new acrylic panel should
be under-sized sufficiently to allow for expansion.
This approach has the advantage of having a minimum impact on the
appearance of the window and can provide the same tinting or UV
protection as the large panels. It also avoids reworking some parts the
window frame edge condition that Mr. Frens indicated would be required
to support the whole-window treatment. The single-pane treatment has
the disadvantage of not providing as large a sealed air space so the
thermal benefit for controlling condensation may be limited, and they
may have a higher cost due to greater labor in fitting and installation.
This treatment will also not protect the window muntins and mullions
from condensation.
The results of these tests should identify the final details for
condensation control at the windows.
William P. Lull is a graduate of the Building Technology program at MIT, a
principal and senior conservation environment consultant at Garrison/Lull
Inc., and is Adjunct Associate Professor of Building Technology at New York
University. He has formerly worked as a designer and project manager for
architects, engineers and government agencies. Mr. Lull has been an invited
lecturer for many groups and author for several publications. He has
consulted on collection environments in many museums, libraries, archives
and historic structures in the US and throughout the world.