Floor Joist Insulation Vapor Barrier

This article discusses the proper location and placement of moisture barriers or vapor barriers in crawl spaces to crawl space moisture.

Floor joist insulation vapor barrier.

This 1 4 to 5 16 thick insulation provides superior protection against radiant heat transfer and also provides an effective vapor barrier preventing condensation which can cause mold. Check rim joists and unfinished basement walls and compare depth with an r value map and chart for your area. Always install batt insulation between the joists with the paper facing up against the. Ground should be covered with a 6 mil polyethylene sheet.

Which way does the insulation vapor barrier or kraft paper go over a basement or crawl space. If your house is elevated and the crawlspace is under that elevation so as to be exposed to the outdoor air then you are fine. Ecofoil floor joist insulation is constructed of a double layer of polyethylene bubble insulation bonded to two radiant barrier metalized sheets. Install the insulation with the vapor barrier facing up toward the heated living area of the house.

First insulation will be going between the floor joist i only filled gaps with foam. Check between floor joists if vented and check perimeter walls if unvented. Install the insulation between the joists with the vapor barrier. If both floors of the house are heated use unfaced insulation.

Insulation provides a barrier between vapor and the structure.