Floor Joist Insulation Vapor Barrier

Check rim joists and unfinished basement walls and compare depth with an r value map and chart for your area.

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. Always install batt insulation between the joists with the paper facing up against the. Facing up towards the floor above or facing down towards the crawl space or basement floor. Ground should be covered with a 6 mil polyethylene sheet.

Check between floor joists if vented and check perimeter walls if unvented. 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. Install the insulation with the vapor barrier facing up toward the heated living area of the house. Second i have foundation vent all around the house should the remain unblock or do the need.

Install the insulation between the joists with the 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. Which way does the insulation vapor barrier or kraft paper go over a basement or crawl space. That vapor barrier is laid directly on the dirt and the seams are overlapped at least 12 inches.

If both floors of the house are heated use unfaced insulation.