I have sheets of plywood nailed outside the windows, will it be possible to sandwich 1/8" thick mass loaded vinyl in between the plywood that is already there and another piece of plywood? If it is, do I use nails, glue, etc...?

  • it depends on why you are doing this
    – jsotola
    Jul 27, 2019 at 7:35
  • I do not see what the reason for it has anything to do with the question.
    – Larvitar
    Jul 27, 2019 at 7:46
  • @jsotola sound-proofing (took me a second too. We kinda just jump right in this.... Also, I had to look that stuff up)
    – Mazura
    Jul 27, 2019 at 7:51
  • 1
    @Larvitar, the reason is relevant ... if you simply want to layer the materials for no reason, then use nails ... if you want soundproofing, then nails may provide undesirable sound transmission ... i don't know for certain
    – jsotola
    Jul 27, 2019 at 8:14

1 Answer 1


Obviously, the wall can’t be made to be floppy; but the soundproofing inside the wall can be floppy. In the Science of Acoustics, we call it a “Limp Mass Barrier.” This is typically why the Mass Loaded Vinyl is instructed to be installed against the studs and then drywall over it. This allows the barrier to move in 3-Dimensional space and bleed off the energy of the sound, resulting in greater net losses of sound propagation through the wall.

“But I don’t want to rip down my sheet rock to put this stuff up.” That’s fine, no need to really. The solution here is to find the studs behind the existing sheetrock with a stud finder, mark them with a blue line, and screw in some Furring strips vertically-through the sheetrock – into the studs.


Stick with nails if that's what you got. No glue if it's temporary. I'd probably use exterior screws.

It's supposed to be furred out so that at least one side can move freely. Then you could even sandwich the furring strips with two layers of vinyl and then plywood it.

  • Do you think the plywood will hold up? I screwed the plywood onto the frame of the window.
    – Larvitar
    Jul 27, 2019 at 8:00
  • @Larvitar - as I understand it, blocking sound transmission using isolation isn't really achievable w/o an extremely elaborate setup; all you can do is add mass. That being said, I'd put long fasteners in the final sheet of plywood that go all the way into the studs (having cursorily tacked up everything else because the final layer will hold everything. Also, I prefer black ;)
    – Mazura
    Jul 27, 2019 at 19:48

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