Floor Joist Insulation Vapor Barrier

Which way does the insulation vapor barrier or kraft paper go over a basement or crawl space.

Floor joist insulation vapor barrier.

Always install batt insulation between the joists with the paper facing up against the. Install the insulation between the joists with the vapor barrier. Check rim joists and unfinished basement walls and compare depth with an r value map and chart for your area. Ground should be covered with a 6 mil polyethylene sheet.

First insulation will be going between the floor joist i only filled gaps with foam. This article discusses the proper location and placement of moisture barriers or vapor barriers in crawl spaces to crawl space moisture. Install the insulation with the vapor barrier facing up toward the heated living area of the house. Insulation provides a barrier between vapor and the structure.

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. 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 between floor joists if vented and check perimeter walls if unvented.

Second i have foundation vent all around the house should the remain unblock or do the need.