Specification Sheet SPOT: PMS 300 & P MS 425 PRODUCT DESCRIPTION Basic Use: High-Performance Fiber Glass Building Insulation batts are intended for use in walls and cathedral ceilings where maximum thermal and ... R-Value Thickness Width R RSI in. mm 15 2.6 3 1/ 2 89 15, 15 1/ 4, 23, 23 1/ 4 381, 387, 584, 590 21 3..7 5 1 / 2 140 15, 15 1/
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