Sep 22, 2014 · To insulate the crawl space walls, Chappell-Dick wonders whether Rockwool Comfortboard 80, a rigid mineral wool insulation, would make a good substitute for rigid foam. …

Feb 8, 2013 · That the earth would absorb the heat from the conditioned space, making the place effectively colder? I have an older house that I want to retrofit that has zero insulation in the floor and …

Jan 27, 2022 · Been getting quotes for insulation in our vented crawlspace (16″ on center). Some vendors are recommending R19 faced (with vapor barrier on the underside, facing the ground) and …

Dec 8, 2009 · In a hot-humid or mixed-humid climate, I'd strongly recommend an encapsulated crawl space, with insulation on the foundation walls rather than the floor. There's usually less area to …

May 13, 2011 · The best place to install insulation in an unvented crawl space is on the interior side of the crawl space walls. If the floor above the crawl space is cold, don't neglect the possibility that you …

Jan 21, 2025 · The rim joist will be closed cell spray foam (existing batt insulation to be removed). The goal is to insulate the floor and perimeter walls of the crawl space to improve the climate for the …

Jul 19, 2021 · I am ready to encapsulate my crawl space and make it a conditioned space in Zone 5A. I’ve researched here and several other places on how to insulate the interior (CMU) crawl space …

Mar 31, 2013 · When installing rigid foam in an unfinished crawlspace, what is needed to have it comply with the fire code? Foam board to be installed on inside of foundation wall and on the underside of …

Jul 11, 2015 · Megan, If you insulate your crawl space walls, bringing your crawl space into the conditioned volume of your house, there shouldn't be any need to install any insulation on your crawl …

Apr 29, 2022 · Since the crawl space is now conditioned space, it seems to me that all the usual passive house insulation requirements would apply. That would mean 4" rigidfoam on the walls, maybe 3-4" …