Detailing : Opening Assemblies


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Detailing : Opening Assemblies

  1. 1. D E T A I L I N G S E M I N A R O p e n i n g s : W i n d o w s p r e s e n t a t i o n
  2. 2. OUTLINE <ul><li>Overview : Windows </li></ul><ul><ul><li>Frame Material </li></ul></ul><ul><ul><li>Function </li></ul></ul><ul><ul><li>Glazing </li></ul></ul><ul><ul><li>Bldg System Interactions </li></ul></ul><ul><li>Terminology : Windows </li></ul><ul><li>Detailing Objectives </li></ul>
  3. 3. Overview : Windows <ul><li>Frame Materials </li></ul><ul><ul><li>Section 085000 – Windows </li></ul></ul><ul><ul><ul><li>Section 085113 - Aluminum Windows </li></ul></ul></ul><ul><ul><ul><li>Section 085123 - Steel Windows </li></ul></ul></ul><ul><ul><ul><li>Section 085200 - Wood Windows </li></ul></ul></ul><ul><ul><ul><ul><li>Aluminum Or Vinyl Clad </li></ul></ul></ul></ul><ul><ul><ul><li>Section 085313 - Vinyl Windows </li></ul></ul></ul><ul><ul><ul><ul><li>Fiberglass Windows </li></ul></ul></ul></ul><ul><li>Window Function </li></ul><ul><li>Glazing </li></ul><ul><ul><li># of Panes : Single, Double, or Triple </li></ul></ul><ul><ul><li>Glazing Types </li></ul></ul>
  4. 4. Overview : Windows <ul><li>Interactions : Building (System) Components </li></ul>Structure Exterior Skin Sealants Weather-resistant Barrier Air Barrier Vapor Barrier Flashing Others?
  5. 5. Terminology <ul><li>Air Infiltration </li></ul><ul><li>Condensation </li></ul><ul><ul><li>Condensation Resistance Factor </li></ul></ul><ul><li>Low-E Glazing </li></ul><ul><li>Heat-Strengthened Glazing </li></ul><ul><li>Tempered Glazing </li></ul><ul><li>Solar Heat Gain Coefficient </li></ul><ul><li>Thermal Break </li></ul><ul><li>U value / R-Value </li></ul><ul><li>Water Pressure test </li></ul>
  6. 6. Detailing Objectives <ul><li>DOB-1 : FIRE </li></ul><ul><li>DOB-2 : EARTH </li></ul><ul><li>DOB-3 : WATER </li></ul><ul><li>DOB-4 : AIR </li></ul><ul><li>DOB-5 : COST </li></ul><ul><li>DOB-6 : TIME </li></ul><ul><li>DOB-7 : SCOPE </li></ul>FIRE WATER AIR EARTH dry hot wet cold ELEMENTS TIME COST SCOPE
  7. 7. <ul><li>Conduction : transfer of hot to cold through materials </li></ul><ul><li>Performance Measurements </li></ul><ul><ul><li>U-value : </li></ul></ul><ul><ul><ul><li>Mtl: average = 0.50 vs. preferred = 0.38 </li></ul></ul></ul><ul><ul><ul><li>Wd/Clad: 0.35 average vs. 0.33 preferred </li></ul></ul></ul><ul><ul><li>Condensation Resistance Factor (CRF) : </li></ul></ul><ul><ul><ul><li>Mtl: average vs. preferred </li></ul></ul></ul><ul><ul><ul><li>Wd/Clad: average vs. preferred </li></ul></ul></ul><ul><li>Thermal Break : required in our climate </li></ul><ul><ul><li>WHY? : Stops transfer of heat from warm side to cold side of the frame </li></ul></ul><ul><ul><li>HOW? : Best thermal break : wide and as thin as possible </li></ul></ul><ul><ul><li>WHERE? : same plane as the outside face of insulation </li></ul></ul><ul><li>Frame Materials: </li></ul><ul><ul><li>Metal vs. Wood vs. Vinyl vs. Fiberglass </li></ul></ul>DOB-1 Fire (Thermal)
  8. 8. DOB-1 Fire (Thermal) <ul><li>Radiation – Heat gain through solar radiation </li></ul><ul><li>Performance measurements </li></ul><ul><ul><li>Solar Heat Gain Coefficient (SHGC) </li></ul></ul><ul><ul><ul><li>average vs. preferred </li></ul></ul></ul><ul><li>Recently, furnaces offered to EUA employees. </li></ul><ul><ul><li>Why? </li></ul></ul><ul><ul><li>HVAC designer who prepared the envelope calculations used a SHGC value in his calculations that could not be achieved with the specified windows </li></ul></ul><ul><li>Reduce solar heat gain </li></ul><ul><ul><li>Air spaces : Gas filled </li></ul></ul><ul><ul><li>Glazing Coatings </li></ul></ul><ul><ul><ul><li>Low E coatings : specified at a minimum in this climate </li></ul></ul></ul><ul><ul><ul><li>Reflects long wave (furnace) energy back into the space </li></ul></ul></ul><ul><ul><ul><li>Reduces short wave (sun) energy that passes through </li></ul></ul></ul>
  9. 9. DOB-2 Earth (Solid) <ul><li>Material interactions : separate dissimilar metals </li></ul><ul><li>Aluminum windows + aluminum flashing = OK </li></ul><ul><li>Aluminum windows + steel lintels = Not OK </li></ul><ul><li>Movement : </li></ul><ul><li>Expand & contract : different than adjacent materials </li></ul><ul><li>Solution </li></ul><ul><ul><li>Sealant joint between windows and adjacent materials </li></ul></ul><ul><ul><li>Receiving head/sill = allows varying dimensions </li></ul></ul>
  10. 10. DOB-3 Water (Liquids) <ul><li>Drainage </li></ul><ul><li>Weeps : bottom of the frame </li></ul><ul><ul><li>Drain any moisture that condenses inside the frame. </li></ul></ul><ul><li>Flashings </li></ul><ul><ul><li>Head + Weather Resistive Barrier (WRB) : lap over flashing </li></ul></ul><ul><ul><li>Sill : pan with end dams : flashing laps over WRB </li></ul></ul><ul><ul><li>Jamb + Weather Resistive Barrier (WRB) : lap over flashing </li></ul></ul><ul><li>Condensation </li></ul><ul><ul><li>Good thermal resistance (U values) </li></ul></ul><ul><ul><li>Usually on the glass (high humidity) </li></ul></ul>
  11. 11. DOB-3 Water (Liquids)
  12. 12. DOB-3 Water (Liquids)
  13. 13. DOB-3 Water (Liquids)
  14. 14. DOB-4 Air (Vapor) <ul><li>Convection : air flow from warm to cold </li></ul><ul><li>Performance measurements </li></ul><ul><ul><li>Air Infiltration CFM/SF : average vs. preferred </li></ul></ul><ul><ul><ul><li>Around frame’s perimeter </li></ul></ul></ul><ul><ul><ul><ul><li>Fill all voids with insulation </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Continuous sealant </li></ul></ul></ul></ul><ul><ul><ul><li>Insulating glass or multi-pane glazing system with an air space between panes </li></ul></ul></ul><ul><ul><ul><li>Proper installation of Air Barriers (AB) and Vapor Barrier (VB) </li></ul></ul></ul><ul><ul><li>Glazing : Clear glass vs. Low-E </li></ul></ul><ul><ul><ul><li>Argon </li></ul></ul></ul><ul><ul><ul><li>Solar Heat Gain Coefficient (SHGC) </li></ul></ul></ul><ul><ul><ul><li>Visible light transmittance </li></ul></ul></ul>
  15. 15. DOB-4 Air (Vapor) <ul><li>Air and Vapor Barrier </li></ul><ul><li>Windows : major source of air & vapor infiltration (in & out) </li></ul><ul><ul><li>“ Quality windows” </li></ul></ul><ul><ul><ul><li>Low U-value </li></ul></ul></ul><ul><ul><ul><li>Low air infiltration values </li></ul></ul></ul><ul><ul><ul><li>High condensation resistance values </li></ul></ul></ul><ul><li>Joints : window openings and adjacent walls </li></ul><ul><ul><li>Pack all voids with insulation to resist heat loss </li></ul></ul><ul><li>Sealant : around the entire perimeter of the opening </li></ul><ul><ul><li>Inside and out : resist air infiltration. </li></ul></ul><ul><li>Openings : pre-wrapped </li></ul><ul><ul><li>Exterior WRB installed @ inside of the openings (jambs/sills) </li></ul></ul>
  16. 17. DOB-4 Air (Vapor)
  17. 18. DOB-5 Cost <ul><li>Material Costs </li></ul><ul><li>Low price compared to metal frame windows </li></ul><ul><li>Size and shapes effect cost </li></ul><ul><ul><li>Vinyl – Cheapest </li></ul></ul><ul><ul><li>Fiberglass – Moderate </li></ul></ul><ul><ul><li>Clad – Expensive </li></ul></ul><ul><li>Labor </li></ul><ul><li>Repetitive assemblies cut down on cost and install time. </li></ul><ul><ul><li>Rain screen assemblies : detail the basic weatherproof parts of the openings the same so the building can be dried in as soon as possible. </li></ul></ul><ul><li>Detail edges of openings : variable exterior skin assemblies’ thicknesses </li></ul><ul><li>Insist on mock-ups of openings </li></ul><ul><ul><li>Rain screen assemblies : free standing (not on the building) </li></ul></ul><ul><ul><li>Difficult for contractors to understand the rain screen concept </li></ul></ul>
  18. 19. DOB-6 Schedule <ul><li>Efficient Use of Const Materials </li></ul><ul><li>Construction sequence </li></ul><ul><ul><li>Easily rehearsed & flexible </li></ul></ul><ul><ul><ul><li>Detailed shop drawings and mock-ups. </li></ul></ul></ul><ul><li>Most windows : fabricated on a per order basis </li></ul><ul><ul><li>Repetition = Value </li></ul></ul><ul><li>Availability – Easy to obtain </li></ul><ul><ul><li>Sizes – Standard and Custom Colors </li></ul></ul><ul><ul><ul><li>Metal Windows </li></ul></ul></ul><ul><ul><ul><li>Vinyl – Limited colors </li></ul></ul></ul><ul><ul><ul><li>Clad – Wide selection </li></ul></ul></ul><ul><ul><ul><li>Fiberglass – Limited colors, but paintable </li></ul></ul></ul>
  19. 20. DOB-7 Scope <ul><li>Aesthetics </li></ul><ul><ul><li>Wide range of sizes, shapes, colors, etc. </li></ul></ul><ul><li>Coordination w/S + MEP </li></ul><ul><ul><li>ResCheck </li></ul></ul><ul><ul><li>ComCheck </li></ul></ul><ul><li>Code : egress requirements? </li></ul>
  20. 21. Overview : Windows <ul><li>Performance ( Elements ) </li></ul><ul><li>Thermal ( Fire ) </li></ul><ul><ul><li>Temperature Change (Range) </li></ul></ul><ul><ul><li>Thermal Transmittance </li></ul></ul><ul><ul><li>U-Value </li></ul></ul><ul><li>Air ( Vapor ) </li></ul><ul><ul><li>Solar Heat-Gain Coefficient (SHGC) </li></ul></ul><ul><ul><li>Air Infiltration (cfm/sq ft) </li></ul></ul><ul><ul><li>STC </li></ul></ul><ul><li>Water ( Liquid ) </li></ul><ul><ul><li>Water Resistance (psf) </li></ul></ul><ul><ul><li>Condensation-Resistance Factor (CRF) </li></ul></ul><ul><li>Structural ( Earth ) </li></ul><ul><ul><li>Design Pressure (psf) </li></ul></ul><ul><ul><li>Deflection (psf) </li></ul></ul><ul><ul><li>Wind loads </li></ul></ul><ul><ul><li>Windborne-Debris Resistance </li></ul></ul><ul><ul><li>Operating Force and Auxiliary (Durability) Tests </li></ul></ul><ul><li>Other Considerations </li></ul><ul><li>Cost </li></ul><ul><ul><li>Initial Cost vs. Life-Safety </li></ul></ul><ul><li>Schedule </li></ul><ul><ul><li>Ease of Replacement/Repair </li></ul></ul><ul><li>Scope </li></ul><ul><ul><li>Aesthetics </li></ul></ul><ul><ul><li>Coordination w/S + MEP </li></ul></ul><ul><ul><ul><li>ResCheck/ComCheck </li></ul></ul></ul><ul><ul><li>Code : egress requirements </li></ul></ul>
  21. 22. Conclusion <ul><li>Questions??? </li></ul><ul><li>Comments??? </li></ul><ul><li>Concerns??? </li></ul><ul><li>Suggestions??? </li></ul>