attic insulation


Old 11-20-06, 11:21 AM
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Smile attic insulation

I would like to make more storage space in my attic. I have blown in cellulose insulation. I scraped a little off leaving about 2 - 3 inches above the joists and put down 4x8 sheets of plywood. Should I be worried about insulation "compression"? Is blown insulation sensitive to "compression"? Should I've scraped off more or less? I don't want to promote condensation. Thanks for the advice!
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Old 11-20-06, 01:36 PM
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attic insulation

Any time you compress insulation, you reduce the R-value according to the concept of lightweight insulation.

Old 11-20-06, 03:01 PM
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This doesn't sound like a good idea to me. Losing insulation is pretty much always a bad idea.
Old 11-21-06, 02:39 PM
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If you insist on storing stuff in your attic, and don't want to comprimise the insulating factor, do this:

Take a few 2"x8"s and run them perpindicular to the joists in your attic. Throw the plywood on top of them.
This gives you an additional ~8 inches of insulation under the plywood that isn't compressed.
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