Insulation, Radiant and Vapor Barriers - proper method for floor insulating

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amorton
05-03-08, 01:15 PM
I am building an addition (18x14) on a mobile home on cement pad. I have built the subfloor on 16" centers using 2x8's, with a crawlspace of about 30 inches. My question is: what is the preferred method to insulate floors? The joists are open and I have easy access to the underside.

resercon
05-22-08, 06:09 AM
Unfortunately areas like these, little critters like to nest. Most instances people staple a perforated sheets, like the ones you find on soffits/eaves to the underside of the joists. Then lay the insulation with the vapor barrier facing upwards and then apply the sub-floor.