Originally Posted by curtisb
given the bedroom is right next to the freeway (and it is verrrrry loud) and I can't seperate the site walls with clips or double wall.
QR seems to be the most commonly discussed product but a local supplier mentioned their primary product is certainteed and just carry the QR EZ snap now.
I have two bits of information:
I've done quite a bit of research and testing (both for acoustics and for installation) on my own of the Silent FX board and although it may achieve similar performance to the QuietRock ES
board, it will cost you more in labor if you are hiring a contractor to do the work.
QuietRock ES was developed and is manufactured as a response to contractor input, so the installer only has to cut through one layer of face paper to score and snap the board vs. cutting through three layers of paper for any other damped board, including some of the other QuietRock models. You may have to fork out more money for the contractor install when using Silent FX.
The QuietRock manufacturers do carry a mold resistant product if you need that, but unless it is necessary it's much less expensive and more effective to use QuietRock ES
. In that case, you can also you QuietGlue Pro
instead of Green Glue, as it performs the same or better and may be less costly.
Feel free to send me a message if you have specific questions regarding the performance of QuietRock on different assemblies.
Because this is an exterior wall you not only have to worry about the wall itself, you also have to worry about windows and doors. Windows and doors, although they may be a much smaller total surface area of the wall vs the wall itself, can cause major decreases in the amount of achievable noise control through the exterior wall partition.
I have an Excel sheet calculator that I have made, based on equations in Harris's Handbook of Acoustical Measurements and Noise Control, that allows you to calculate the composite STC (STC rating has to do with the noise control) of you complete assembly. All you need are the surface areas of each component (i.e. wall, windows, doors).
Just let me know if you need/want it via email/message, and I will send it along. Really useful.
I apologize for the length here. Just wanted to be thorough/detailed enough to help out