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This is a 4 ft by 250 ft roll of perforated, double-sided metalized foil radiant barrier on a woven polyethylene scrim. It reflects radiant heat rather than insulating, so it works best stapled under rafters or used as house wrap to cut summer attic heat gain. The perforations let moisture vapor pass, which matters in attics and wall cavities. It is a low-cost, DIY-friendly way to reduce radiant heat compared with foam board or blown insulation, but it adds little R-value on its own.
In stockSold by TWCUSEP SUPERSTORE
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Lowest price we've seen: $32.88 on Nov 11 at Amazon. Tracked across 2 stores since Nov 11.
This self-adhesive foil radiant barrier comes in a 4 ft x 250 ft roll that covers 1000 square feet. It is perforated, so it is breathable. It can be used in attics, sheds and warehouses, and as house wrap.
Both sides are reinforced metalized aluminum (99.9%), which blocks 97% of radiant heat in summer and winter. A woven polyethylene scrim gives it industrial strength and tear resistance. It passes the required ASTM fire test (E84 using the E2599 mounting method) for building materials.
