The rowhouse sound transmission reduction project is well underway. It is a multi step affair and incorporates some specialized products. The first is a roxul stuff cavity, followed by the mass loaded vinyl. These two items muffle and deaden sound as they are dense products. To decouple the vibrations we then use a rubber isolated clip followed by a layer of dense drywall. This is a costly and labour intensive process to detail but it makes a lot of sense to do so in the multi family projects. Words cannot describe accurately how hideous it is to install the heavy mass loaded vinyl product. The 4x25 ft roll weighs 100 pounds, and combines the nastiest elements of hanging drywall on a ceiling with stapling poly vapour barrier.
step 1 - roxul
step 2 - mass loaded vinyl
step 3 - metal furring strips are clipped into the rubber isolating piece.