Ground floor cantilever protection
Zone 5 (Ohio)
House has a section of the first-floor kitchen cantileverd about 2′ +/- with only about 12″ clearance to grade. It’s also on the north side of the house, and will be adjacent to a deck, so it’ll definitely be a moist area that I won’t be able to inspect easily. I’m planning to follow a detail similar to the one here: https://www.greenbuildingadvisor.com/article/insulating-a-wood-framed-floor-assembly — with the exception that the lower wall section is a masonry basement wall, and I’ll be doing an air barrier with Adhero on the interior side, coming down the wall (behind rigid foam), across the bottom of the cantilever, edge sealed to the masonry. While there was some dissent in the comments of that article, it seems like it should be a safe assembly moisture wise…
My remaining question is the “cover foam with …. soffit material” part. I want to use something that I won’t need to worry about for a long while, either in terms of moisture degradation or critters (ants / mice). The critter concern seems to rule out any wood-based products, and since it’s a pretty small area I’m not going to be able to special order anything exotic. Would it be appropriate to use fiber-cement trim boards like https://www.menards.com/main/building-materials/siding/trim-boards/allura-trade-1-1-4-x-8-x-12-fiber-cement-trim-board/1409062/p-1444450980598-c-13411.htm?tid=3914978467575240140&ipos=5 ? How about just 1/2″ Durock backer board? Or should I be looking at aluminum sheet?
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