Floor Joist Insulation Vapor Barrier

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.

Floor joist insulation vapor barrier.

Ecofoil floor joist insulation is constructed of a double layer of polyethylene bubble insulation bonded to two radiant barrier metalized sheets. Which way does the insulation vapor barrier or kraft paper go over a basement or crawl space. First insulation will be going between the floor joist i only filled gaps with foam. 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.

Facing up towards the floor above or facing down towards the crawl space or basement floor. That vapor barrier is laid directly on the dirt and the seams are overlapped at least 12 inches. Check between floor joists if vented and check perimeter walls if unvented. Insulation provides a barrier between vapor and the structure.

This article discusses the proper location and placement of moisture barriers or vapor barriers in crawl spaces to crawl space moisture. Install the insulation between the joists with the vapor barrier. Second i have foundation vent all around the house should the remain unblock or do the need. Check rim joists and unfinished basement walls and compare depth with an r value map and chart for your area.

Install the insulation with the vapor barrier facing up toward the heated living area of the house.