Dense Packing an Interior Wall
First, we drilled a hole above the interior wall from inside the attic.
Wall Insulation in O'Fallon, IL
Next, we dense packed the interior wall with cellulose insulation.
Dense Packing an Interior Wall for Sound Attenuation
Then, we sealed the original hole to prevent air leaks. Now, the family can enjoy a movie in the living room without hearing a toilet flush in the bathroom.