Had this done? Yep. Highly recommended over fiberglass batts. Higher R-value for
a given depth, much less air filtration, and excellent noise control.
Maybe 25% more than what batts would have cost.
You don't want to do this yourself. It takes a pro to avoid a crap job or leave
voids around pipes and electrical cables. Too dry and you'll lose anything you
spray, too wet and you'll create a mold problem.
Those DIY blowers work OK for attic jobs with dry material, but don't do
anything close to the pressure needed for damp material in the walls.
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