3 ms·
I never knew this was a thing, but it makes perfect sense, and apparently works pretty well too. "The foil, usually applied with thousands of staples, isn’t of
by blakesterz 5y ago
I never knew this was a thing, but it makes perfect sense, and apparently works pretty well too.
"The foil, usually applied with thousands of staples, isn’t off-the-shelf Reynolds Wrap, though it is sold in rolls. It’s aluminum on the outside, woven threads of polyester and fiberglass inside, and laminated with a high-temperature adhesive, according to Dan Hirning, founder of Firezat, a San Diego company that sells the foil."
- wongarsu 5y agoRegular aluminum foil would probably just tear when you try to staple it to a building. Having some kind of backing material to give it some strength sounds sensible.
- LorenPechtel 5y agoThe backing material is also insulation. The R-value is low but the objective is to reduce the heat transfer so it doesn't reach the ignition point, not to actually keep it cool.