Design & Construction Resources
Insulating Historic Masonry Buildings Safely: How WUFI Can Help
With the rising popularity of Passive House and EnerPHit renovation in brownstone and brick masonry renovations in the US and Canada, the question comes up time and time again: What...
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Heavy-Duty Window Flashing by Chris Corson Using Extoseal Encor
We had the opportunity to meet up with Chris Corson, Technical Director for EcoCor High Performance Building Systems (formerly, EcoCor Design / Build), on a significant new project in Woodstock,...
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475 Does WUFI®: Mold Potential and Historic Masonry Retrofits in Climate Zone 6 (Burlington, VT)
475 Does WUFI®: Mold Potential and Historic Masonry Retrofits in Climate Zone 6 (Burlington, VT) A key piece of the puzzle as we decarbonize our building stock is successfully retrofitting...
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Can't vent at valleys and dormers? Use a smart vapor retarder (not foam)
Can't vent at valleys and dormers? Use a smart vapor retarder (not foam) Straight gable roofs are easy to vent, and ideally would be vented. But often we end up...
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Keeping Sheathing Dry in High-R Double-Stud Walls - a WUFI study
Double-stud walls have become a popular and cost efficient way to build well-insulated envelopes: two 2x4's spaced apart easily makes a R-40+/10.5" thick wall. Such walls also include a thermal...
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Unvented Flat Roofs: A Technical Discussion
Flat roofs have often been built with the insulation all on top of the vapor closed drainage plane - as this avoids dew point condensation issues inboard of the roofing....
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A high performance roof should be vented - how to do this properly
Vented roofs work, and are the best solution to eliminate many issues that appeared when we started to insulate buildings - 'leaks' caused by condensation, mold, water damaged sheathing and...
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Integrating a window in the airtight layer - brick/brownstone retrofit case
Windows and doors are inherently the weakest link in our buildings' enclosures. Even with the use of great triple pane glass, super-spacers and thermally broken frames, you would be hard-pressed...
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Blower Door Protocol for Passive House Certification
Automated blowerdoor test according to EN13829 with DG700 manometer controlled by laptop Building air-tightness below 0.6 air changes per hour at 50 pascals pressure (0.6ACH50) is a simple target that...
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Blowing dense-packed cellulose, it's like magic
Infrared image of Cellulose bays not completely filled with densepack behind sheetrock. With Pro Clima's reinforced intelligent membranes INTELLO Plus, DB+ and the exterior vapor open SOLITEX Plus WRB -...
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