Green Building Techniques- Page 3 of 315
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Do I need insulation in the overhang of a flat roof?
The house has a flat, EPDM roof, and the living space envelope is sealed with closed cell insulation - walls and roof rafters (no attic), completely filled. The overhangs are…
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Exterior insulation panel with an oddly-detailed balloon-framed house
Hi folks,We've recently completed a whole-roof upgrade of our 1910s balloon-framed house outside of Boston (Zone 5) where we've put on a full-layer peel and stick membrane, 1.5" of polyiso,…
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Air sealing attic floor & top floor ceiling lights
Hi all,We're doing a remodel on our Seattle-area craftsman with a vented attic and are working on developing a tight(er) building seal.I'm a bit stumped on the best approach to…
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Perplexing Proposal for Wall Assembly
Hi everyone! Since embarking on the adventure of building a new house in Climate Zone 4A, this website and forum, along with the PGH book, has been an invaluable resource…
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Exterior roof Larsen truss (CZ2, with vapor diffusion port)?
CZ2. Single story residential with hip roof (just over 4/12 slope).Looking to make a conditioned unvented attic, insulated at the rafter line (not the ceiling/attic floor). CZ2 so a vapor diffusion…
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Taping Polyiso sheets over zip?
Hello GBA, Wrapping up detailing on a house build in climate zone 4C. Our wall assembly previously called out 2" of cavity rock black R-8 for an open joint vapor open…
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Vent opening size
We are working on a PGH project and have had some discussions about the vent opening for the roof vents. As you can see on the sketch we have 2.5"…
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Tall crawlspace encapsulation
I am building a new home and plan on encapsulation. My lot is sloped so I have a fairly tall crawl space. It is 4' tall at the masonry side…
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Kneewall Insulation
There are numerous articles on insulating and air sealing kneewalls on this site and others. The consensus when choosing to insulate the wall is the use fiberglass batts between the…
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Tips on how to build a landscaped roof
We're building a single-story house in CZ3C with a 12" deep green roof atop a low-slope roof with an encapsulated attic for HVAC ducts. Any good references for what the…