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. …

Jan 21, 2025 · The crawl space is approximately 5 ft in height and the perimeter walls are 12″ CMU without insulation on the interior or exterior. Of the 5 ft in height, approximately 4 ft below grade with …

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 …

Jul 24, 2019 · I recently purchased a home about 45 years old on the east coast of Virginia. I’ve been researching insulation as I intend on doing both the attic and crawl space. […]

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 …

Nov 18, 2025 · I’m looking for some advice on insulating and encapsulating the crawl space in my 1890s brick shotgun house in Louisville (Zone 4A). The crawl ranges from about 3 feet deep […]

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 …

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 …

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 …

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" …