I am building a 22x14x8.75' theater room in my basement. The rear 3rd is going to be 2 sided and the front 2/3rds is behind concrete walls. After stressing for months about how to soundproof the room, I have decided to do the following:

QuietRock 510 on all walls and ceiling...I have to buy 60 sheets to get a price close to what the manufacturer is "suggesting". So, I plan to install the drywall and test for sound...If I am not happy, I will get Green Glue and apply the 12 sheets I will save to the ceiling...if that doesn't work, I will graciously accept what I have. Of course I am installing insulation and quiet putty around electrical boxes.

Is there anything else that I may need to consider? Thanks in advance.

By the looks of your member profile and number of posts, it looks like you may be relatively new here.

Please allow me to gently suggest before doing ANYTHING to PLEASE read the entire "sticky" on Acoustical treatment on the top of the forum.

As you may have already found out, Quiet Rock is a legitimate product. However, many of us here have decided instead to use double drywall, mounted on resilient channel or furring strips, and sandwiched between them a layer of Green Glue.

My basement is also surrounded by foundation on two of 4 sides, but it is imperative to treat ALL sides, as well as the ceiling.

Best wishes on your journey-and it IS a journey, but loads of fun, believe me.

Tom
Chinaclipper

I'll second Tom's suggestion. Without running the numbers, you may actually get better results and spend less money using the more standard double drywall and GG sandwich on all wall/ceiling surfaces.

Not to mention it being MUCH easier to work with and install.

Bryan

I don't want to hijack this thread but I have a simple q.?

If three of my walls in my HT room are concrete, do I need to bother double drywalling?? It seems redundant to have to spend that money on GG and double drywall, when the only thing that will be bothered by the sound will be worms, and my sprinkler system.

Thanks

gkmurton - if you want to sound isolate the room - yes. You need to treat all walls and the ceiling or else sound will just flank the weakest link. Go to the GG website for articles of flanking. The photos explain it well.

Thank you very much. I didn't think with it being concrete it would be that important.

The sound will go through the single layer, into the studs, travel along the studs to the joists, and on through the house.

Sound is tricky as it can travel through the air (like a hole in the wall), or through solids (like your framing)