I'm in the process of building out a composing and mixing room that will occupy about half of a 25' X 30' free standing garage. Once in a while I might record B3 or a vocalist, but for the most part it is just me and the keyboard at a pretty low volume. The closest neighbors are about 25 feet away, and I wouldn't want to disturb them. Although I've spent many hours researching MSM techniques on this site, I need some hand-holding on a couple of items:
1. The existing walls are (from outside in) 1/2" masonite fake wood siding, 1/2" OSB Sheathing. 2X4 studs with fiberglass batt insulation in the stud bays, and 5/8" drywall. I'm thinking I should remove the existing drywall and hang a couple of layers of 5/8 on RC. However, there is an existing vinyl sliding window (3X5) mounted on the outside of the studs that I wouldn't mind keeping. The question is how to get it to perform at the same level as the walls. I could feasibly hang another window on the inside of the wall from the RC / drywall, but don't quite know how to pull this off. Suggestions?
2. The ceiling is nice and tall, slightly higher than 10 feet with 5/8" drywall. Presently there is nothing above the drywall except the rafters and the roof, which is about 17 feet high at the peak. It is roofed with shingles and 1/2" plywood underlayment. I'm assuming this and the drywall below the rafters represent a double leaf. But there is not very much mass. Should I add a layer of drywall to my existing layer and some insulation on top of that and call it a day? Or should I hang the drywall from RC on the ceiling as well? Also, it gets frightfully hot up there most days. I'm wondering if some sort of fan evacuation system would be a good idea if I baffled it and ran it through a sealed duct to the outside. Perhaps I could place a fan on the gable farthest from my room and evacuate hot air from the area over the studio through sealed ductwork and a baffle. Comments?
3. One more thing - I'm looking to find a definitive answer about blown-in cellulose insulation. Is it as effective as fluffy fiberglass or Roxul? If it is, I may elect to create a cathedral ceiling in my room by putting 2 layers of drywall on the 2X6 rafters of the peaked roof and filling the void with blown in cellulose.
Thanks in advance!
Composer's Room in CA
Originally posted at johnlsayers.com, topic 17777.
Mass/air/mass is the term used when explaining a fully decoupled assembly. Mass/spring/mass requires math :) http://www.gearslutz.com/board/attachme ... -space.pdfI'm in the process of building out a composing and mixing room that will occupy about half of a 25' X 30' free standing garage. Once in a while I might record B3 or a vocalist, but for the most part it is just me and the keyboard at a pretty low volume. The closest neighbors are about 25 feet away, and I wouldn't want to disturb them. Although I've spent many hours researching MSM techniques on this site, I need some hand-holding on a couple of items:
Blown in has the same type properties. The issue can be that if you overblow you can bridge or short circuit the assembly since you have to know that you can not blow in cellulose unless the assembly has been completed on both face sides. Wet-spray cellulose has shown to be of a small advantage...but this will not be something that can be applied to this roof for a a simple reason. One is that you are taking away the venting that roof systems require in a natural situation and the other is that once this venting is removed, you now have the unenviable task of making certain that you have an effective moisture barrier that protects the exterior side of the roof. In a vaulted/cathedral the installer has to know his stuff or you run the risk of ice daming, depending on where you live and the climate. And if they tell you cellulose can do the job, wet or dry...they need more education, plain and simple. Polyurethane foam is the material you require but this only answers part of the job.3. One more thing - I'm looking to find a definitive answer about blown-in cellulose insulation. Is it as effective as fluffy fiberglass or Roxul? If it is, I may elect to create a cathedral ceiling in my room by putting 2 layers of drywall on the 2X6 rafters of the peaked roof and filling the void with blown in cellulose. Thanks in advance!