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Morningside Crossings Case Study: Passive House in a Large-Scale Retrofit

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This class will be a case study of Morningside Crossings, a project that was born from the needs and interests of the neighborhood and one that pushes the envelope for sustainability in a low-income housing tax credit (LIHTC) project. The case study looks at a broad spectrum of issues, including wellness, integration into the community, innovative stormwater management, air quality monitoring, and energy efficiency. Morningside Crossings is a 46-unit affordable senior housing project that is the adaptive reuse of a school, as well as a new addition that is located over on-site parking. A Neighborhood Community Center will be located on the commercial end of the site in an addition from the 1940s and includes a plaza that will be used by the Center, the residents of the building, and the neighbors as well.

Morningside Crossings is the second large-scale multi-family retrofit in the country built to Passive House standards and is a unique demonstration of three approaches to Passive House detailing and construction. The project utilizes three different wall sections in the Community Center, the new construction addition, and the retrofit of the school. It also will capture 100% of its stormwater on site and monitor the indoor air-quality in contrast to the outdoor air.

The case study will begin with a five-minute refresher of the fundamentals of Passive House standards and will include a discussion on construction detailing in three different wall sections, the challenges of blower-door testing, and the construction schedule. Presenters also will address the influence of Passive House standards on the budget and its effect on indoor air quality, in addition to some of the particular challenges of the project.

An intermediate to advanced level of information will be presented; therefore, a preliminary understanding of Passive House is advised.

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Morningside Crossings Case Study: Passive House in a Large-Scale Retrofit

  1. 1. AIA PITTSBURGH Provider number A217 MORNINGSIDE CROSSING CASE STUDY: PASSIVE HOUSE IN A LARGE-SCALE RETROFIT Course # PH1.1 LU/HSW Laura Nettleton of Thoughtful Balance Brandon Nicholson of NK Architects Phil Ford of Sota Construction Services APRIL 12, 2018
  2. 2. Credit(s) earned on completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request. This course is registered with AIA CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. ___________________________________________ Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
  3. 3. This presentation is protected by US and International Copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the speaker is prohibited. ( Copyright Materials
  4. 4. Course Description This class will be a case study of Morningside Crossings, a project that was born from the needs and interests of the neighborhood and one that pushes the envelope for sustainability in a low-income housing tax credit (LIHTC) project. The case study looks at a broad spectrum of issues, including wellness, integration into the community, innovative stormwater management, air quality monitoring, and energy efficiency. Morningside Crossings is a 46-unit affordable senior housing project that is the adaptive reuse of a school, as well as a new addition that is located over on-site parking. A Neighborhood Community Center will be located on the commercial end of the site in an addition from the 1940s and includes a plaza that will be used by the Center, the residents of the building, and the neighbors as well. Morningside Crossings is the second large-scale multi-family retrofit in the country built to Passive House standards and is a unique demonstration of three approaches to Passive House detailing and construction. The project utilizes three different wall sections in the Community Center, the new construction addition, and the retrofit of the school. It also will capture 100% of its stormwater on site and monitor the indoor air-quality in contrast to the outdoor air. The case study will begin with a five-minute refresher of the fundamentals of Passive House standards and will include a discussion on construction detailing in three different wall sections, the challenges of blower-door testing, and the construction schedule. Presenters also will address the influence of Passive House standards on the budget and its effect on indoor air quality, in addition to some of the particular challenges of the project. An intermediate to advanced level of information will be presented; therefore, a preliminary understanding of Passive House is advised.
  5. 5. Learning Objectives • Explain Passive House standards in a retrofit from the 1890s and recognize the challenges during construction from the view of both the contractor and the architectural team. • Recognize the financial costs of Passive House. • Identify the performance targets for meeting Passive House. • Understand the construction detailing required in order to achieve Passive House standards in a retrofit. At the end of the this course, participants will be able to:
  6. 6. WELCOME. Passive House in a Large-Scale Retrofit Morningside Crossings Case Study
  7. 7. PASSIVE HOUSE Building Energy Use Annual Site Energy Usage TYPICAL PASSIVE HOUSE BUILDING AMERICA PROGRAM ENERGY STAR® TYPICA L Data Source: IG Passivhaus Österreich TYPICAL BUILDING
  8. 8. PASSIVE HOUSE Typical Passive House Multifamily Energy Use Distribution 10% Data Source: PHPP 57% Plug Loads/ Appliances 43% Building Operations 5% 6% 22% Lighting Hot Water HRVs, Elev., Etc. Heating/ Cooling
  9. 9. We Need Scale We Need Ambition
  10. 10. SCALE AMBITION PASSIVE HOUSE
  11. 11. Passive house What is it? 1. A Science-Based Building Philosophy 2. A Means to Hit the Target
  12. 12. PASSIVE HOUSE Predictable Results Passive House vs. Non-Passive House Energy Consumption Model Matches Performance
  13. 13. PASSIVE HOUSE Relative Performance between: PHIUS Passive House, ENERGY STAR ®, Conventional buildings (US D.O.E.) Health and Happiness
  14. 14. PASSIVHAUS Passivhaus in North America
  15. 15. PASSIVE HOUSE Sample results from Passive House Planning Package (PHPP) Verification Page PHPP
  16. 16. PASSIVE HOUSE PHPP Sheets Energy Modeling PHPP
  17. 17. Thermal Energy - Continuous Insulation - Air Tight Envelope - Thermal Bridge Free Details - Adv. Plug Load Management Light - High Performance Windows & Doors - Solar Shades - Large Openings Air - Cont. Fresh Air - Heat Recovery Ventilation PASSIVE HOUSE Passive House is Building Physics Science Based
  18. 18. THE COST
  19. 19. Morningside Crossing
  20. 20. Pennsylvania Housing Finance Agency. PASSIVE HOUSE Policy Context Passive House confers advantage in competition for LIHTCs (Low Income Housing Tax Credits). PHFA’s LIHTCs are highly competitive: only 1 in 4 project proposals are awarded LIHTCs. Projects that pursue Passive House earn 10 bonus points out of a total of 130 possible points. 59 of 179 projects pursued Passive House during first two years of PHFA’s new policy. Competition spurred innovation. Innovation cut costs.
  21. 21. PHFA Data: Cost Comparable? Proposed PHFA Projects 2015-2016 Construction Cost (Projected)
  22. 22. Proposed PHFA Projects 2015-2016 Construction Cost (Projected) Passive House vs Conventional – Less than 2% cost difference. PHFA Data: Cost Comparable?
  23. 23. MORNINGSIDE CROSSING $167/sf
  24. 24. MORNINGSIDE CROSSING
  25. 25. 1897 School THREE BUILDINGS IN ONE Morningside 1929 AdditionNew Wing
  26. 26. Nicholson Kovalchick Architects P.S. / nkarch.com THREE BUILDINGS IN ONE Morningside
  27. 27. Nicholson Kovalchick Architects / WALL ASSEMBLIES 3 Wall Sections
  28. 28. Nicholson Kovalchick Architects / WALL ASSEMBLIES 1897 Wall
  29. 29. Nicholson Kovalchick Architects / WALL ASSEMBLIES 1929 Wall
  30. 30. Nicholson Kovalchick Architects / WALL ASSEMBLIES 2018 Wall
  31. 31. Nicholson Kovalchick Architects P.S. / nkarch.com Standardize design detailing and components. STEPS TO ACHIEVE Passive House
  32. 32. CONSTRUCTION PROGRESS
  33. 33. Nicholson Kovalchick Architects P.S. / nkarch.com THREE BUILDINGS IN ONE Morningside
  34. 34. Nicholson Kovalchick Architects P.S. / nkarch.com THREE BUILDINGS IN ONE Morningside
  35. 35. 20171011 (36)
  36. 36. WINDOW ADVENTURE
  37. 37. MORNINGSIDE WINDOW ADVENTURE Our 1st Solution
  38. 38. Nicholson Kovalchick Architects P.S. / nkarch.com MORNINGSIDE WINDOW ADVENTURE A Wake-Up Call
  39. 39. Nicholson Kovalchick Architects P.S. / nkarch.com MORNINGSIDE WINDOW ADVENTURE A Wake-Up Call
  40. 40. MORNINGSIDE WINDOW ADVENTURE The Evolution
  41. 41. MORNINGSIDE WINDOW ADVENTURE The Evolution
  42. 42. MORNINGSIDE WINDOW ADVENTURE The Evolution
  43. 43. MORNINGSIDE WINDOW ADVENTURE The Evolution
  44. 44. MORNINGSIDE WINDOW ADVENTURE The Evolution
  45. 45. Nicholson Kovalchick Architects P.S. / nkarch.com MORNINGSIDE WINDOW ADVENTURE The Evolution
  46. 46. MORNINGSIDE WINDOW ADVENTURE The Evolution
  47. 47. MORNINGSIDE WINDOW ADVENTURE The Evolution
  48. 48. INTERSECTING WALLS
  49. 49. MORNINGSIDE INTERSECTING WALLS Our Approach EXIST FOOTING (APPX, UNVERIFIED) INTERIOR BELOW GRADE BELOW GRADE EXTERIOR EXIST MASONRY FOUNDATION WALL AIR BARRIER (HFO CC SPF) NOTE: USE PAPERLESS GWB @ BASEMENT FOR MOISTURE CONTROL E1 BELOW GRADE WATERPROOFING AND DRAINAGE (ALTERNATE) UNDERSLAB AIR BARRIER (CONTINUOUS VAPOR BARRIER, ALL EDGES AND JOINTS TAPED) AIR BARRIER JOINT: ADHERE VAPOR BARRIER TO MASONRY WALL CONTINUOUSLY. HFO CC SPF TO DIRECTLY ADJOIN/ LAP VAPOR BARRIER F4 EXIST MASONRY WALL AIR BARRIER (HFO CC SPF) E1 E1 F6 AIR BARRIER (HFO CC SPF) EXTEND AIR BARRIER (HFO CC SPF) 5' ALONG FLOOR UNDERSIDE, ENCAPSULATE JOISTS AND STL STRONGBACKS EXIST CONCRETE FLOOR EXIST CONCRETE JOIST ON CURVED STL STRONGBACK SET STUD WALL ON SUBFLOOR ON SLEEPERS TO PROVIDE THERMAL BREAK PATCH EXISTING PLASTER AND LATH CEILING AS REQUIRED AFTER SPF INSTALLATION ON FLOOR STRUCTURE ABOVE THERMALLY BROKEN SUPPORT AS REQUIRED - NO MTL STUD CONNECTION TO SLAB OR MASONRY WALL EXISTING STEEL STRUCTURE NEW ASPHALT SHINGLE ROOF NEW SHEATHING ON EXISTING STEEL PURLINS EVALUATE AND REBUILD EXISTING GUTTER STRUCTURE AND RELINE. PATCH AND REPAINT CORNICE EXISTING MASONRY WALL EXIST PLASTER AND LATH CEILING INTERIOR ATTIC E1 F5 AIR BARRIER (HFO CC SPF) EXTERIOR EXIST FOOTING (APPX, UNVERIFIED) INTERIOR GROUND LEVEL BELOW GRADE EXIST MASONRY WALL INTERIOR PTN OR FURRING WHERE APPLIES UNDERSLAB AIR BARRIER (CONTINUOUS VAPOR BARRIER, ALL EDGES AND JOINTS TAPED) AIR BARRIER JOINT: ADHERE VAPOR BARRIER TO MASONRY WALL CONTINUOUSLY AIR BARRIER (HPO CC SPF) EXISTING 1897 RAFTER 1897 BUILDING E1 F5 R2 EXISTING FORMER PURLIN EXISTING 1929 MASONRY WALL EXISTING ROOF DECK EXISTING PURLIN WITH WOOD SLEEPER AIR BARRIER (HPO CC SPF) FLASHING ASPHALT SHINGLE ROOF ON NEW SHEATHING AIR BARRIER / VAPOR RETARDER (ROOF AIR BARRIER MEMBRANE AIR BARRIER JOINT (EXTEND ROOF AIR BARRIER / VAPOR RETARDER OVER EDGE OF DECK FLASHING AIR BARRIER (HFO CC SPF) AIR BARRIER (ROOF MFR'S AIR BARRIER / VAPOR RETARDER MEMBRANE HEADER, SEE STRUCTURAL LINTEL, SEE STRUCTURAL 20161897 R3 E1 NICHOLSON KOVALCHICK ARCHITECTS 6101 PENN AVENUE, SUITE M01 PITTSBURGH, PENNSYLVANIA 15206 T: 412.872.2680 www.nkarch.com 2017 NICHOLSON KOVALCHICK ARCHITECTS PSC CHECKED BY: DRAWN BY: PROJECT #: ISSUANCE# 456 SOUTH GRAHAM STREET PITTSBURGH, PENNSYLVANIA 15232 T: 412.661.6010 www.thoughtfulbalance.com PHFA PROJECT #: TC2016-0415 1802&1808JANCEYSTREET PITTSBURGH,PA15206 4/19/20179:31:45AM A9.10 16045 XX XX EXTERIOR AND INTERIOR - WALL DETAILS (A/1897) MORNINGSIDECROSSING A.M.RODRIGUEZ&ASSOCIATES SCALE: 1 1/2" = 1'-0"1 BASE OF EXTERIOR WALL SCALE: 1 1/2" = 1'-0"2 WALL AT INTERMEDIATE FLOOR SCALE: 1 1/2" = 1'-0"3 TOP OF EXISTING WALL SCALE: 1 1/2" = 1'-0"5 BASE OF INTERIOR WALL SCALE: 1 1/2" = 1'-0"7 EXTERIOR WALL AT 1929 ROOF SCALE: 1 1/2" = 1'-0"6 EXTERIOR WALL AT 2016 ROOF CLOSING / FOR CONSTRUCTION SET 04.14.17
  50. 50. MORNINGSIDE INTERSECTING WALLS Our Approach
  51. 51. MORNINGSIDE INTERSECTING WALLS Existing Conditions
  52. 52. MORNINGSIDE INTERSECTING WALLS Existing Conditions
  53. 53. MORNINGSIDE INTERSECTING WALLS Existing Conditions
  54. 54. MORNINGSIDE INTERSECTING WALLS Solutions
  55. 55. MORNINGSIDE INTERSECTING WALLS Solutions
  56. 56. MORNINGSIDE INTERSECTING WALLS Solutions: Underslab
  57. 57. MORNINGSIDE INTERSECTING WALLS Solutions: Underslab
  58. 58. MORNINGSIDE INTERSECTING WALLS Solutions MORNINGSIDE INTERSECTING WALLS Solutions: Podium
  59. 59. MORNINGSIDE INTERSECTING WALLS Solutions MORNINGSIDE INTERSECTING WALLS Solutions: Podium
  60. 60. MORNINGSIDE INTERSECTING WALLS Solutions MORNINGSIDE INTERSECTING WALLS Solutions: Podium
  61. 61. MORNINGSIDE THERMAL BREAK Steel to Steel
  62. 62. MORNINGSIDE THERMAL BREAK Steel to Steel
  63. 63. BLOWER DOOR TEST #1
  64. 64. BLOWER DOOR TEST #2
  65. 65. BLOWER DOOR TEST #3
  66. 66. BLOWER DOOR TEST #4
  67. 67. WRAPPING UP
  68. 68. This concludes The American Institute of Architects Continuing Education Systems Course AIA PITTSBURGH LAURA NETTLETON LAURA@THOUGHTFULBALANCE.COM BRANDON NICHOLSON BRANDON@NKARCH.COM PHIL FORD PFORD@SOTACONSTRUCTION.COM

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