500 sqft (4ft x 125ft) of NASA TECH Commercial Grade Perforated No Tear Green Energy Radiant Barrier Reflective Insulation Attic Foil Roof Attic House Wrap SCIF RIFD

This foil is almost tear proof but cuts easily with a knife. The great thing is that it reflects heat rather than insulates. We used to "insulate" our entire house and attic during a to the studs remodel in 2018 . Our gas bill dropped 30% compared to the old fiberglass insulation. This time I used to insulate plumbing and heat ducts under a mobile home in central Montana.

Great product. Robust but easy to cut with scissors blocks heat transfer through roof for a few hours which is all you need sometimes.

Great energy saving underlayment. In addition adds a bit of R-value as well. Easy to apply and works.

Really holds up

Trying it.all to lower ac costs and this looked good. It's heavy , but simple to use.

This stuff is much stronger than the bubble-wrap versions. I installed it over insulation in the attic rafters- we have a steeply pitched roof with lots of surface area that creates much solar gain. Haven't gotten hot weather just yet, but hoping for a good cooling effect based on other reviews. We have a 100yr old house and no more room in the rafters for thicker insulation, so hoping this will work. Our finished attic is a real hot box in the summer even with fiberglass insulation.

I love how it does what it's supposed to do, it eliminates the heat in my storage easy to cut in size and very strong.

This was a very heavy Aluminum foil on steroids.I use it as a reflective barrier along with insulation in a small building we use as an office at our grain storage bins. There is a small A/C window unit that will keep the building very cool in the hot weather.The foil was easy to use. I stapled in on the stud walls and taped the seams with a/c duct alumin tape.Very pleased and will buy enough to eventually cover the rafters in my residence.