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 29, 2013 · David, If the crawl space walls are insulated, and there are no open vents, then there is no need for any insulation in the crawl space ceiling. For more information, see Building an Unvented …

Mar 11, 2019 · And yet another site had a detail that showed the rigid foam board on the wall and an approximately 2′ wide section of rigid foam board on the dirt, insulating the floor, following the entire …

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 …

Nov 18, 2025 · I have a couple of follow-up questions to better understand the advice given: 1. Why the caution against closed-cell spray foam in this application? A few replies suggested avoiding closed …

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 …

Jan 31, 2024 · The key is to balance moisture management, insulation effectiveness, and the unique aspects of your home's construction and sealed crawlspace. Given your research and the differing …

Jan 14, 2025 · Hi Malcom and Miles, I have a project with a similar situation and I am planning to do closed cell spray foam in the interior at the rim joists/ sill of an unvented crawl space. It seems like a …

Dec 23, 2021 · The three best methods and the corresponding materials for insulating roofs and attics with input from Kohta Ueno.

Jan 28, 2016 · From the articles I've read on this website I know most people prefer a basement, slab on grade, or a sealed crawl space to a vented crawl space. Unfortunately a basement isn't an option …