Insulating Crawl Space with Existing Vapor Barrier/Radon Mitigation
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 …
What’s the Best Way to Insulate Crawl Space Walls?
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. …
Crawl space insulation in 130-year-old home - GreenBuildingAdvisor
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 […]
Insulating a Crawlspace Floor - GreenBuildingAdvisor
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" …
What makes more sense, insulating crawl space vs. under the floor ...
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 …
Sealing and insulating a crawl space - GreenBuildingAdvisor
Mar 11, 2019 · -Install a dedicated crawl space dehumidifier My question are: Is the R-13.1 rigid foam on the walls and rim joist enough insulation without the fiberglass batts between the joists? Would you …
Building an Unvented Crawlspace - GreenBuildingAdvisor
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 …
Value of Insulating a Crawlspace - GreenBuildingAdvisor
Sep 18, 2022 · Here’s my situation: The house… – 1-story in Oakland, CA – 100 years old, likely little to no wall insulation, but there is blown-in insulation in the attic – There are 14 6′ tall, old single-paned …
Blown In Insulation for floor above crawlspace? - GreenBuildingAdvisor
Jan 3, 2023 · The insulation has to be thick enough so that condensation won't happen on the inner face. The assembly won't dry much, but to the extent it will dry it will dry to the interior. This is why …
Installing Rigid Foam Between Floor Joists Above Crawlspace
Jan 15, 2018 · It's better to install insulation on crawl space walls, and to leave the crawl space ceiling uninsulated, than it is to insulate a crawl space ceiling. For more information on this approach -- what …