Short and sweet (yea, I was kidding myself when I wrote that).
shorter version. More info in the following.
I'm having underlay and carpet installed. Would putting OSB subfloor in the theater room make a big enough difference in sound isolation?
Should I paint good, sealed primer between drywall layers for helping sealing and sound leakage?
Finishing the basement in a townhouse. Planning a dual layer drywall for the connecting walls to the other units. Semi-floating wall - not touching the joining wall, but connected to the concrete floor, and overhead joists. Also doing a dual layer drywall ceiling with resilient channels between. Everything is in place and ready for the drywall next weekend.
Order I was planning. Ceiling (first layer), all walls (first layer). Taping and mudding (rough to seal, not to have a finish. But obviously not lumpy to make it uneven). Resilient channels, then second ceiling, and second layer for the joining walls. All this would be finished.
So, second question first I guess. Should I paint primer on the first layer ceiling and joining wall? I have special primer that is suppose to do a better job at sealing and such. I got it for painting our garage because the people before use smoked in there and it definitely helped. So I was wondering if it might do a little bit of good to help sealing the joints and corners. It's next to no extra work, so I'm considering doing it anyway.
First question second. I'm having carpet and underlay installed ("professionally" by HomeDepot (I live in Ingersoll, Ontario, in case anyone has other suggestions that are inexpensive)). So they'll be doing the vapor barrier and such. Would putting down OSB before the underlay and carpet help with sound isolation? Mostly concerned about lower frequencies, as well as the cost of OSB lately. I was planning on it before, when it was still ~$20/sheet for 5/8ths". If it would make that much of a difference, I could still do just the theater room with about 6 or 7 sheets and just have a small lip in the threshold. It would probably take another 7 or 8 sheets to do the whole basement, and I really don't think the cost is worth it for the rest.
I have a single Paradigm Servo 15 at the moment. Later, way down the road, I'm hoping to add another sub, but first I need to pay for all these supplies, and then my next purchase will be a 4K projector (upgrading from my 1080p).
There's a lot of info I'm leaving out because I ramble, and this is already long, lol. But I was just looking for those specific answers.
Also, I rent. The owners are 'paying' for the supplies for the basic renovations. But extras I'm paying for out of pocket, with a very limited income.