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East central Indiana | Did the whole house 30 years ago. Dusty job but not to bad.
If you do side walls you need to drill 2 holes between easy stud. One a foot or 2 from the top and one a foot or two from bottom. This let's the air out.
Take a wire and feel around inside hole to make sure their is no blockage. (I used a wire coat hanger )
When the hole is filled it should fill firm if you push on the insulation with your finger.
Watch for leaks. Had a few places where wall cavity was not sealed at top. Started to fill the attic.
In the attic it will settle over time, extra will save coming back and adding more later.
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Blowing in cellulose insulation in a 100 year old house
