Soundproof Drywall
This is going on the short list of “Things I want”. Quiet Solution’s soundproof drywall boasts that one 5/8″ sheet is acoustically equal to (8) layers of standard 5/8″ drywall. Not many of us have the square footage to spare by packing in an additional 5 inches of drywall to the interior of your homes. Also, don’t count on any of your doors functioning properly to account for that. That would never happen of course, as it would be simpler just to construct a masonry wall, than build up a mountain of gypsum.

photo credit: djweitzner
Seeing as how the average interior wall has an STC (Sound Transmission Class) value of about 34, good enough to separate your family but still hear their conversations through the wall. Partition common walls separating apartments, townhomes and condos are required to have and STC of 50. Which is good enough to keep your business your own, yet still allows your neighbors to share their musical tastes with you….like it or not. Most of Quiet Solutions’ QuietRock products sport an STC of at least 50. They have an interactive sound example page at their website which allows you to experience the contrasting STC values as if a garage band was playing in the next room.
The best possible soundproofing solution they currently have has an STC value of 80, which is meant for home theaters and can be reached by adding two layers of their 1 3/8″ to a stud wall. This assembly, I imagine, when used in master bedroom applications, will bring upon the end of the phrase “Stop it! You’ll wake the kids!”
HGTV’s “I want that!” showcases the QuietRock product in the video below
There are other uses of course. Making your home feel solid and quiet and every sound in it’s place can be appreciated by everyone in your household. Finally get that media room/home theater you’ve always wanted? Now keep it ramped up way beyond bedtime. Oh, and those neighbors you have? You know the ones, the ones who, at best buy, go straight for the stereo demos and their accompanying volume knobs until products drop from the shelves, and your sanity drops from sight? Yeah, treat your exterior walls.
The downside of course for this product is the price. Prices start at 40$ (volume purchase) for a 4′x8′ sheet, and only go up from there with higher rated products. Standard drywall is of course, considerably less, but to gain a comparable STC rating using a combination of standard drywall, resilient channels and other various products would bring the project budget closer to what you would have spent by just ordering soundproof drywall.
- Quiet Solutions’ Website

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May 15th, 2008 at 2:39 pm
This stuff does not cost $40 a sheet to the average joe like me. I called 2 different suppliers. Was quoted $65 and $72 a sheet plus freight.
May 21st, 2008 at 11:22 pm
Prices gotta come down if this is going to be more widely accepted. Otherwise looks great!
May 22nd, 2008 at 1:39 am
Yeah, unfortunately the “average joe” gets left out on the discount. Now, let’s say you’re a big time homebuilder looking to soundproof every separation wall in a townhouse development, then I’m sure they’re all ears as you’ll qualify for the volume pricing. Plus, with the ‘deal’, many vendors hope to get that business relationship that keeps them in mind when the builder moves on to their next project.
The ‘average joe’, well, he’s gonna buy just enough of the product to take care of their pet project, whether it be home theater, or just a remodel. After that, the average joe won’t likely make another purchase for years, possibly decades. A little competition in the marketplace would help prices out, but I think they have their polymer manufacturing process patented, so time will tell.
June 11th, 2008 at 7:29 am
Update: I went with Green Glue. Much cheaper, much better laboratory test results.