25 Nov '14, 3pm

What’s the best way to insulate crawl space walls? via @GBAdvisor #insulation

What’s the best way to insulate crawl space walls? via @GBAdvisor #insulation

Air-permeable insulations, including rock wool, need a separate air barrier Building assembly components that work as a system to restrict air flow through the building envelope. Air barriers may or may not act as a vapor barrier. The air barrier can be on the exterior, the interior of the assembly, or both. (and more than one of the BSC foundation details accomplishes this with a sealed rigid insulation layer between the masonry foundation and the air-permeable “cavity” insulation). Above-grade walls can have interior air barriers, like the Airtight Drywall Approach (ADA), but it is hard to consider ADA as appropriate for a crawl space or think of other interior sheathing Material, usually plywood or oriented strand board (OSB), but sometimes wooden boards, installed on the exterior of wall studs, rafters, or roof trusses; siding or roofing installed on the sheathing—some...

Full article: http://www.greenbuildingadvisor.com/blogs/dept/qa-spotlig...

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