bsmith
March 3, 2009, 7:07pm
#1
White granular substance about 3/16th of an inch. Brittle and crumbly to the touch. Never saw anything like this. It might not even be insulation, just something that was spilled in a section of the attic. Any ideas?
dduffy
March 3, 2009, 9:07pm
#2
Bill, I don’t know what the white stuff is but that’s Vermiculite on the right side of the first picture I BET…
ccurrins
March 3, 2009, 9:22pm
#3
I agree with Dale on they gray stuff being Vermiculite.
The other “white” looks like and might be >>> http://www.perlite.net/
Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently. It is an industrial mineral and a commercial product useful for its low density after processing.
Perlite softens when it reaches temperatures of 850–900 °C (1,560–1,650 °F). Water trapped in the structure of the material vaporises and escapes, and this causes the expansion ...
bsmith
March 3, 2009, 9:29pm
#5
I saw the vermiculite and run across it quite often here, but perlite is a new one. Good info. Thanks guys.
