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CMHC Report. Canadian Renovators’ Committee CHBA March 4, 2010. EQuilibrium Update. EQuilibrium Housing Status 7 projects completed Riverdale NetZero Avalon Discovery 3 CHESS Now House Inspiration – the Minto ecohome Abondance EcoTerra. EQuilibrium Update. - PowerPoint PPT Presentation
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CMHC Report
Canadian Renovators’ CommitteeCHBAMarch 4, 2010
EQuilibrium Housing Status
7 projects completedRiverdale NetZeroAvalon Discovery 3CHESSNow HouseInspiration – the Minto ecohomeAbondanceEcoTerra
EQuilibrium Update
CANADA MORTGAGE AND HOUSING CORPORATION
EQuilibrium Housing Status
4 Project Under ConstructionEcho Haven, CalgaryGreen Dream Home, KamloopsUrban Ecology, WinnipegAlstonvale, Hudson
EQuilibrium Update
CANADA MORTGAGE AND HOUSING CORPORATION
CANADA MORTGAGE AND HOUSING CORPORATION
EQuilibrium Housing InSights
• Five Completed– Riverdale NetZero Deep
Wall System
– Now House Exterior Envelope Retrofit
– Riverdale NetZero Active Solar Thermal System
– Riverdale NetZero Passive Solar Design
– Avalon Discovery 3 Passive Solar Design
CANADA MORTGAGE AND HOUSING CORPORATION
CMHC Research Projects - Ongoing
Basement Wall Insulation Retrofit Monitoring
• Comparing the performance of typical basement assemblies to alternatives
• Testing in two sets of five houses in Saskatchewan
• Basic test set up: In an existing house (not new), build interior framing/insulation and finishing system on a south or west basement wall
CANADA MORTGAGE AND HOUSING CORPORATION
CMHC Research Projects - Ongoing
Basement Wall Insulation Retrofit Monitoring
CANADA MORTGAGE AND HOUSING CORPORATION
CMHC Research Projects - Ongoing
Basement Wall Insulation Retrofit Monitoring
CANADA MORTGAGE AND HOUSING CORPORATION
CMHC Research Projects - Ongoing
Basement Wall Insulation Retrofit Monitoring
Conventional Wall:
• 2X4 stud wall with R-12 fibreglass batts
• 6 mil poly
• Half inch drywall
• Vapour barrier paint (to compare to other wall that also has vapour barrier paint)
CANADA MORTGAGE AND HOUSING CORPORATION
CMHC Research Projects - Ongoing
Basement Wall Insulation Retrofit Monitoring
Alternative Walls:
• Traditional wall with no polyethylene
• R-12 open cell foam, with polyethylene
• R-12 open cell foam, no polyethylene
• 1 inch of expanded polystyrene against the wall behind 2X3 wall; no poly
• 1 inch extruded polystyrene against the wall behind 2X3 wall; no poly
CANADA MORTGAGE AND HOUSING CORPORATION
Traditional wall
No poly wall
• Some trends so far but we have to wait for all ten houses to have a year of monitoring (not until January 2010)
• There is no wall that looks problematic based on the data provided so far
• There is quite a wide range of interior conditions from house to house that may make more difference than the performance of one wall to another
CMHC Research Projects - Ongoing
Basement Wall Insulation Retrofit Monitoring
CMHC Research Projects - Ongoing
Basement Wall Insulation Retrofit Monitoring
• So, are the alternate walls in the Saskatchewan houses doing better than the standard stud and poly wall?
• Generally yes, but there are not huge differences in these first 5 houses– Wall with no poly has lower moisture content than
wall with poly– Walls with 1 inch of foam against the wall doing
better than standard walls (except that high moisture between extruded board and concrete)
CMHC Research Projects - Ongoing
Evaluating the Effect of Energy Related Building Envelope Retrofit Strategies for Housing on the Wetting and Drying Potential of the Wall Assembly
Performance Analysis of Residential Hot Water Efficiency Devices – Instantaneous DHW Savings
Payback Period for Green Building Features in Single Family Detached Dwellings
Sustainable Building Envelope Retrofits for Existing Homes
Design and Specification for NZ Building Envelope Retrofits
Radon Update
Proposed Radon Protection Measures in 2010 NBC
• Assume all areas are susceptible to levels of radon > 200 Bq/m³ (unless otherwise shown)
• Install poly under slab and pipe through floor in all new houses
• Seal poly to footings or foundation wall• Seal all penetrations• Assumption is that homeowner will test for radon in
the first winter of occupation (but this is not part of the code)
Radon Update
Radon Mitigation Measures for Existing Houses
• Source removal – get rid of the radon
Radon Update
Radon Mitigation Measures for Existing Houses
• Ventilation
Equation is simple: if you double the entry of fresh air to the basement, for example, you will cut the radon concentration in half
Obvious costs to increasing ventilation rates for heating or cooling ventilation air
Radon Update
Radon Mitigation Measures for Existing Houses
• Entry Point Sealing
Radon Update
Radon Mitigation Measures for Existing Houses
• Entry Point Sealing
Radon Update
Radon Mitigation Measures for Existing Houses
• Active soil depressurization systems
• Block wall suction or depressurization
• Sump and drainage suction
• Under membrane suction
• Subslab suction
Radon Update
Radon Mitigation Measures for Existing Houses
• Active soil depressurization systems
Radon Update
Radon Mitigation Measures for Existing Houses• Potential for freezing foundation footings
• Potential for icing and blockage of vertical vents
• Durability of exterior fans in Canadian climates
• IAQ implications of side wall venting rather than vertical venting
Radon Update
CMHC Research:
Canadian Radon Mitigation Case Studies
The project will investigate the performance of radon mitigation systems installed in Canadian houses.
The results of this research will show whether current Canadian radon strategies, advice to consumers and code provisions are effective at reducing radon infiltration into houses
Will assess other implementation and performance considerations.
Radon Update
External Research Program:
Survey of Characteristics in Homes with Elevated Radon Levels
To investigate houses in a high radon neighbourhood; to analyze which housing characteristics (if any) are likely to produce higher radon levels; to look at the efficacy of floor drain traps as a remedial measure for these homes.
Radon Update
Health Canada working on Mitigation Guide based on US model
Should be ready this Spring
CANADA MORTGAGE AND HOUSING CORPORATION
Other
•2009 Get it in Writing!
Initiative
CRA and CHBA initially launched the Get it in Writing! Campaign
in 1995
In 2008, CMHC was approached to lead a new Get it in Writing!
initiative given the corporation’s consumer marketing experience
Get it in Writing! is consistent with CMHC’s mandate to promote
better quality housing and to provide Canadians with unbiased
information to help them make better housing-related decisions
CANADA MORTGAGE AND HOUSING CORPORATION
Get It In Writing Campaign
Get It In Writing!
– Website Live– Testimonials – Printed
Brochures - CRA
CANADA MORTGAGE AND HOUSING CORPORATION
Other
CANADA MORTGAGE AND HOUSING CORPORATION
Other
CANADA MORTGAGE AND HOUSING CORPORATION
Other
Online Brochure
CANADA MORTGAGE AND HOUSING CORPORATION
CMHC Report
CRCCHBAMarch 2010