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Soundproofing a Ceiling

Soundproofing a home is an art, but it can also be a win for the environment. In this video, Matt Risinger, master builder, takes us to a job site where they are blowing in recycled cellulose insulation for soundproofing. The insulation is recycled newspaper and the claim is that it is 85% recycled content—you can actually see some printing from the newspaper and multiple color ads.In this case, they are also borate treating. Borate is a natural mineral that repels pests, cockroaches, termites and more. With wood fiber or cellulose-like papers from you'd be worried about its origin. In this case, a bale of recycled material is cut open and dropped into a hopper with an auger. A gas engine is used, and the material is shredded. Shredded newspaper is delivered via a tube. They put a netting on the wall and use a pneumatic stapler to all the studs and they're filling all the cavities. The ambient sound on a sound meter is up to 70 and when tested, it goes to 50 and there's no door, workmen are still busy in close proximity and still it's approximately 10 15 decibels lower. That is impressive.In addition to the recycled material, there is Acoustiblok. There are 2x4 trusses with an 18-inch gap between the ceiling and the subfloor bow that Advantech and the workers have netted that all the way across. They will fill the entire cavity without cellulose, which will help with footfalls.