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Do you live in south Louisiana and have a raised home?
LSU AgCenter offers the summary of a study of the subfloor moisture levels of south Louisiana, raised-foundation homes with six different insulation systems includes the resulting recommendations – all intended to help homeowners, builders, architects, insulation contractors, home inspectors and others balance energy efficiency, comfort and durability issues.
The best insulation to use for hot humid climates is open cell spray-in foam insulation. This foam seals all air leaks and insulates very well in the walls and at the roofline.
Question: I have spray foam insulation in my walls, but I don’t know if it’s open cell or closed cell spray foam. How can I tell the difference and how do I address the moisture?
My in-laws took approximately 12 inches of water in their single story 3,200 square foot home. The home was gutted as soon as possible. Unfortunately, we only recently noticed, more than two weeks later, that we did not think to remove the vapor barrier strip located on the inside base of all exterior walls.
Many homes here in the gulf south have foundations that are raised and have semi-enclosed crawlspaces.
According to an LSU AgCenter subfloor study, Insulating Raised Floors in Hot, Humid Climates, the most effective subfloor insulation in our hot, humid climate is rigid poly-iso foam board with all seams and penetrations sealed and polyurathane closed cell sprayfoam.