What is this stuff in my attic?


Old 10-01-04, 12:38 PM
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What is this stuff in my attic?

I have some strange substance UNDER the rolled insulation in my attic. My neighbor said something about some fire retardant put in during the 1930's... but I don't know if that's what this is. My main concern is whether it is asbestos based... check out http://www.ouroldhouse.info under "pictures" then "attic" if you think you might know.
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Old 10-01-04, 06:13 PM
Join Date: Nov 2001
Location: USA
Posts: 1,873

The only type of attic insulation that I know that contains asbestos is Vermeculite. The insulation in your pictures is not Vermeculite. It may be a slag type of insulation like Rock wool or Mineral Wool. To me it looks like Cellulose, which is a paper product which contains a fire retardent chemical known as Boric Acid. Take a small piece of it outside and light a match to it, if it does not light at all then it is probably a slag insulation. If it lights but goes out when you remove the match, then it is probably Cellulose. If you want more information on asbestos in our homes, go to the above stated address.
Old 10-09-04, 06:42 PM
Join Date: Aug 2000
Location: USA
Posts: 15,834

For pictures of vermiculite, go to http://www.epa.gov/asbestos/insulation.html#What
Old 10-12-04, 01:41 PM
Join Date: Jul 2002
Location: Kansas City, KS
Posts: 588
I have the same stuff in my attic (built in 1985) so I know it is not asbestos.

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