I'm making these as per Experiments in panel vibration damping using what he calls a constrained layer substituting BB plywood for the 3/4 mdf. Why am I doing this? I'm cheap and had the materials laying around. Getting 2 sheets of NoRez to Canada would cost me $155.87:dizzy:..
So here is the plan: 3/4 inch BB plywood, three layers of self adhesive ice and water shield, 1/4 masonite adhered with Blue Seal waterproofing membrane, about 1 1/4 inches of Roxul and then the rest of the cavity loosely filled with fiberglass insulation. I only had to buy the plywood.
Will this sound good? I don't know. Will it be waterproof? Yes!
I can always retrofit the NoRez...
Progress so far (there are little temporary braces in the first pic): these things are like rocks...

So here is the plan: 3/4 inch BB plywood, three layers of self adhesive ice and water shield, 1/4 masonite adhered with Blue Seal waterproofing membrane, about 1 1/4 inches of Roxul and then the rest of the cavity loosely filled with fiberglass insulation. I only had to buy the plywood.
Will this sound good? I don't know. Will it be waterproof? Yes!
I can always retrofit the NoRez...
Progress so far (there are little temporary braces in the first pic): these things are like rocks...


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