Green Homes News

Any ideas what could be causing these large cold spots on thermal imaging? The picture shows the edge of an upstairs room. In the attic above, there is visibly plenty…

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.…

The building science findings and the repair made to this wine room mystery

Hi all, My efficient DHW plan involves:1) a sanco 2 heat-pump water heater2) a compact, insulated, home-run distribution3) low-flow fixtures……except for a soaking tub! I’ll be building it myself to fit…

Hi all,have quite an emergency on our hands. Engaged an MEP engineer months ago with plenty of time to draft our MEP set. We were very close to completion and…

I'm looking for recommendations for a General Contractor in the Denver, Colorado region.It's a smallish residential remodel ($125-150K) in a wildfire/urban interface area. If any of you have referrals for a…

I'm a little embarassed to ask a question that has arisen since I decided to redo my attic HVAC and insulation.  Background:  I'm going to completely air seal the attic…

Hyperscale data centers are a growing market, but field trials using “edge” data centers in homes offer promise.

Hi all,Is anyone here using both an ERV and a separate ducted whole-house dehumidifier in the same home?I’m especially interested in mixed-humid or hot-humid climates where ventilation plus low sensible…

Can anyone point me to a resource who has direct knowledge (not theory) about creative moisture management in old slabs with no sill gaskets under base plates?1960's home with slab…