Wood foundation assembly for a Pretty Good House
Hello, first time poster here! Looking for general feedback with any suggestions for improvement welcomed.
I’m playing around with a wood foundation assembly based on Mike Guertin’s suggestions from his 2020 presentation. This would be for a self-build DADU a few years in the future. I’m planning to get an engineer to sign off on everything, because this is a seismic area and I’ve never built a house, just done extensive remodeling and a Habitat build.
•Zone 3A, mixed humid climate, bordering Zone 4.
•Carolina clay, gently sloped site. There’s currently a leaky garage on the site.
•Termites, water, and radon intrusion are the biggest concerns in my county, and I’ve dealt with all of them extensively in my current house. So that’s why foam and lumber will be sealed off as best as possible with the WP200 and Moistop.
•I didn’t write it down, but the rain screen would be wrapped top and bottom in a screen to keep out pests.
•I threw the inner ZIP sheathing in there as an additional fire/seismic precaution, not certain if it will be necessary though?
•This shot is of the crawlspace; the main wall assembly is different, based on the Bonfiglioli design. The roof plans are a bit unusual too, so if there’s any interest I could post them as well. I’m aiming for passive performance, but not currently planning on getting it certified.
If you have any questions about details I’ll happily post better drawings!