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Insulation check please


MWD
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Just found this site. Need to spend more time here for sure. I found insulation in another thread similar to mine that is identified as Rockwool. It's mostly grey with light colored chunks. Is this what I have?

It's stuck together well and breaks apart easily, like shreaded cardboard. A photo...

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tn_20111116233744_insl.jpg

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What Jim said, cellulose, which is often made from recycled paper and treated with a fire retardant. Borate is one of the chemicals used.

Rockwool is only found in houses over 40 years old in my area. Younger than that will have fiberglass. Or cellulose. In that other thread, we were talking about the rare shredded wood insulations.

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Here's some blown-in cellulose on top of some paper-backed yellow-white material. I think it is an early fiberglass product, 1950's house.

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