Insulation question – GreenBuildingAdvisor
I have a situation where the new roof was framed over the old roof. I’ll include a sketch. My question is, where the old roof meets the ceiling it gets very tight and I’m practically unable to insulate much, at least not without touching the underside of the old sheathing. What is the best way […]
Hello! I’m seeking advice on how to insulate the rim joist area on my 1950’s Cape Cod near Philadelphia. It’s a stick frame with brick veneer (no weep holes as far as I can tell), and the basement is a walkout. The joists sit on a sill plate, which sits on a block wall. At […]
PETER Engle | Oct 25, 2025 09:52am | #1 With a location at the bottom of a hill, your house is more likely than most to take on water. If it’s not too late, you should apply both insulation and a waterproofing system (not damp-proofing) to the exterior foundation walls. Warm ‘n Dry is one […]
My understanding is that when building a conditioned attic below an unvented hybrid roof assembly, it is not necessary to install an air barrier on the underside of the roof assembly, directly below the fluffy insulation (as you would when building an unvented cathedral ceilings). For example, see the attached detail, from Martin’s old article […]
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We recently gut-renovated our 100yo brick home in Cleveland, OH (Zone 6A). We modernized it with two heat pump systems covering 4 distinct zones. The upstairs zone – the original 2nd floor + original bonus room above garage – has a Mitsubishi system with total capacity of 3 tons, and is the subject at hand. […]