We're converting the garage into a home theater as part of our total house remodel. So #1
, cost is an issue due to all the cost overruns on the rest of the job. If it were up to me, I'd leave the garage as it is with open stud walls and do this part of the project later. But apparently we have to close it up to pass final inspection.
I've attached a copy of the layout of the home theater. I've read through a ton of stuff on this forum and on Sound Isolation Company's website. Yesterday I met with one of the drywall subs who's bidding the project. He didn't seem very flexible on how to sound isolate. His idea was to use the hat channels secured DIRECTLY onto the studs. No clips. Hmmmm. Then he said that the cost of doing double layer of 5/8" sheet rock with Green Glue was going to be higher than the cost of a single layer of Quiet Rock 500 with the acoustical sealant and putty pads. At least he knows about putty pads! He quoted about $100 per 4x8 sheet of Quiet Rock installed. We need about 40 sheets in this 21x19x9.5 room.
I plan on building a couple of 18" subs. I know sound isolation works really well for high frequency sound waves, but many have stated that low frequency long wave bass tends to go right through most stuff. For that heavy mass such as mass loaded vinyl is preferred. But that stuff is very expensive.
1) I just learned about another product - Homasote 440 which has an STC of 55. This stuff looks very promising, and it's less than 1/2 the cost of the Quiet Rock. Does anyone have experience with this stuff? http://www.homasote.com/Installation...highlights.pdf
It would go over the clips and channels and then a layer of sheet rock would go over on top of that. Has anyone had experience with this product?
2) The other issue is our media closet. Current plans are for a door to enter the media closet from the side of the theater. The biggest issue is the equipment rack is going to face the theater so that's a giant fenestration allowing sound to leak right through. We could sound isolate the media closet itself, but clips and channels will be very difficult to use in such a small space.
Would it be more practical to just turn the stand 90 degrees so that it can only be accessed by opening the closet door? Everything could run off an IR repeater. This way at least we have a good wall to isolate the sound and not have an fenestration for the rack.
3) Finally, the former garage door is going to be a solid wall, except I'd like a 36" door for ease of getting stuff into and out of the theater. I don't want to drag stuff (especially construction materials) through the rest of the house. I know heavy mass is better. MDF is preferred over foam. I plan on getting spring loaded bottom of door sealer, and perimeter sealer. I might even cut a piece or two of Homasote 440 and overlay it onto the door on the inside and then cover that with some acoustic cloth. So I'm looking for an exterior door, 36" x 6'8", that's best suited for sound isolation. Are there preferred doors for this kind of application?