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I’m in climate 4c (Pacific northwest) and looking to put HVAC ducts in a vented crawlspace of a future build. Vented crawlspaces do well here in the PNW and I prefer to not condition it. Attic is also vented. My contractor gave me two options:1. Run insulated HVAC ducts in an open web floor truss […]
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GBA advisors, Hello all, looking for feedback on the attached design Climate zone “5A” , Connecticut Building Codes. Attempting to follow “Joseph Lstiburek’ perfect wall design as well as info gathered from the GBA site. https://buildingscience.com/documents/insights/bsi-001-the-perfect-wall (Open Joint Vertical Cladding with rain screen, 4″ External Rigid foam insulation, no cavity insulation, 2×4 construction, European aluminum […]
We’re doing a down-to-the-studs-and-slab “rebuild” of a small 2×4 wood frame construction cottage. All heating and appliances are electric, This is in Eugene, Oregon, which is climate zone 4C, a mild climate with moderately high humidity in the winter and low humidity in the summer. Interior vapor production in the winter would arise from one […]
In CZ6 and currently installing interior smart vapor retarders. A combination of Membrain and Majrex. Thinking about paint next. Have a strong desire to use something like JW Wall paints limewash mineral paint or similar. (https://www.jhwallpaints.com/products/lime-wall-paint). From what I’ve read, limewash paint is very vapor open. If true, this would likely work well with the […]
I have recently purchased an older home, and there is a 10″ hard pipe running into my mech room from the exterior of the home. It is not connected to anything. I have been told that this fresh air pipe is for the combustion air of tank water heaters. I want to use the pipe […]