Green Homes News

Hi,We have a 200 year old house in upstate new york that is 1400 sq ft between 2 floors, with a simple gable roof. We are redoing the roof, and…

A friend has a single-story house in climate zone 7 with an older, non-condensing natural gas boiler. The home is heated with hydronic baseboards on a single zone. There is…

Does anybody know how to determine the F-factor of a slab-on-grade with insulation on TOP?I'm trying to find/calculate the F-factor of the assembly shown in the attached image (with and…

Hi. I’m renovating a bathroom in Florida and I’m trying to make sure I’m not building a mold trap which is a common case down here. One wall of the tub…

I am in the process of having my engineer design a home on a frost protected shallow foundation using monoslab, which in my cz 6, I can do a 12…

Hello GBA friends,I'm working on details for a new construction build in WA climate zone 6. Cold and dry area. Single story, slab on ground floor. See detail attached. This stem…

Hello GBA friends, I'm finalizing designs for a new consruction residence in WA. Zone 6. Cold dry high snow area. Details attached show where I am at with roof/ceiling plan. Questions:1)…

Hi All, Would there be a downside to using polyiso "roof" insulation for crawlspace walls and rim joists, and for the rim joists inside the house? This is the type that…

Early coordination with energy modelers and mechanical designers turns Passive House goals into buildable strategies

The National Home Performance Conference is April 13-16, 2026

Is there anyway to add a little blown in fiberglass to an attic by hand? I need to topup a few areas, but not nearly enough to rent the machine.…