Green Homes News

Any reason that I couldn't/shouldn't cut & cobble 1" foil-faced polyiso into rafter bays and then spray foam (closed cell) over it? The thinking is that if I ever have…

I'm in climate zone 4A. We have a crawlspace that (through work done by us and the previous owners) is no longer vented, has a vapor barrier, and has a…

Hey all, as I keep working on this house on piers and beams, I'm wondering what people think about the need to create air/moisture barriers on the outskirts of the…

A builder’s storied experience demonstrates best practices for ridding a house of a massive honeybee colony

Hello, community,my client wants to build an attached addition using 2' continuous footing with about 2.5' high concrete wall sitting on top, and a SOG within the foundation perimeter. Per…

Hey All,Working through air sealing my garage which is an attached, drive under garage with living space above and to the side. I've read a bit and watched Jake Bruton's…

Hello All,  I posted recently about concerns about adherence to all the Zip Tape rules, and was looking for other options.  You all were very helpful.  In discussing our concerns…

If I well exceed the 1/300 nfva minimum set out in R806.2, can there be any issues with this? I have 40% at the ridge and 60% at the eaves…

What do you guys think about this?  Zone 5, northern utah with two large shed roofs that face south.  They are both 1.5:12 pitch and have HT underlayment on them…

I'm getting an ERV, I'm looking for one that allows me to make incremental adjustments to the cfm output. Someone came in and pitched me a Vanee AI series V150E75NT…

Can anyone tell why using "dual pressure differential valves" for plumbing, 3, in a box with inner and out filters for air movement to release pressure or vacuum inside my…

Green Homes 

FERC rule specifies long-term regional transmission planning and cost allocation

Hi there! First time posting here.I am converting a 10′ x 10′ shed into a tiny house in New Haven, CT and trying to figure out how to adequately control…

I'm trying to get a gauge on how far I need to take the foundation / stem walls on a mudroom retrofit / rebuild.Climate Zone 6 / MontanaOther context info…

Hi GBAs,I have truly read so many of these articles about insulation choices in the last 2 months but alas, here I am with a question about my own specific…

If my wall assembly requires a class II vapor retarder per R702.7, does my ceiling assembly also require a class II vr by virtue of R805? If not, where are…

Hello AllI have a basement in Vermont that has the first floor decked with Advantech.  The floor is going to sit until spring.  I would like to tape the seams…

I am working on plans for a new house with a builder in northeastern Japan (Sendai region) which is a mixed climate with lows of around -.4C (31F) to 28C…

Does anyone have experience with a Minotair ventilation system in a cold northern climate (I'm in Alaska)? Thanks!Alyson