These plastic insulation pins are used to mechanically fasten rigid foam board to the foundation wall. This is to be used prior to installing your crawl space vapor barrier, and is not intended to be used on the vapor barrier itself. Requires drilling a hole through the foam board and into the foundation wall.
Drill bit size needed-5/16 Length of fastener-3.5" long Head diameter- 2.5" Max thickness of foam insulation-2" 250/pk
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