Will Roxul Safe N Sound make a difference ? - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 13 Old 12-25-10, 01:28 AM
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Gakgdave
 
Join Date: Dec 2010
Location: Regina, sk, canada
Posts: 2
I have a very similar plan to yours I've completed the first layer of royal and must say I quite happy with it. Having our master bedroom above the home theater room has made this one of the most valuable upgrades to the home theater as it allows me to watch at something close to a reasonable volume when they (wife and child) are sleeping. It is quite a bit denser than the pink stuff I'm not sure that I'd believe the pink would do as well. It is also rated for a crazy temperature level so you can push it right against the duct work without fear. In fact that is one of the Trickest parts of my install is I have the 2 main heating duct lines with multiple openings running along the ceiling in home theater room and then I think 3 exit points for heating into the room above.
I took special care to place insulation both a I've and below the lines that ran into the bedroom and the sound went from being easily pin pointable as coming up from the vents to not being able to pinpoint the vents and it being noticably quieter.
I will add that this is the type of job that the first 80% gets you 50% of the way there and the last 20% gets you the other 50%. What I mean by this is the first 80% was sticking up 80% of the material into the easy 16 inch spaced joists and runing the dual layers around the vent lines. That resulted in about 1/2 the sound drop I saw. The other 50 % drop was from finishing the piddly work of doing the many many cuts to finish fixing it into all the special non standard places. One of the most key ones that you must be sure to get is the holes that are along the side wall above the drywall and below where the roxal layer ends between the floor joists. For me the royal touched the vapor barrier and I stopped there initially. After doing some more sound testing I discovered that it was almost as good as having an open hole because the only thing stopping the sound from coming up that path was the vapor barrier and a piece of drywall in the master bedroom both which provide little protection. K cut out 16' by 4' depending and put it up against the vapor barrier so it would touch the top royal layer and the top of the drywall below.

Anyways I'll finish with the key points that I found
* get a sound source and test with it to ensure you're results are what you want need them to be (by far the most important) a potable radio would work as when you seal it youre done...
* use royal it's quality stuff built fir the job and use a mask it's kind of visions stuff to breath in
* sondproof everywhere and use 2 layers and test after each layer I'm only done the first but I think I'd pay an extra 150 for another 4-5 db to take it from quiet to less quiet plus going back to add is Notable more expensive
* use the drywall disconnection runs you can buy for sound proofing don't screw the drywall right to the joists that will defeat some of your sound proofing efforts
* good luck pay attention to detail and test and refine

Dave
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post #12 of 13 Old 12-25-10, 01:32 AM
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Gakgdave
 
Join Date: Dec 2010
Location: Regina, sk, canada
Posts: 2
iPod was about to die I missed some of it's spell correction errors. 'royal' should read roxal the others i apologies for.
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post #13 of 13 Old 12-26-10, 11:16 AM Thread Starter
Shackster
 
Join Date: Oct 2010
Posts: 36
Re: Will Roxul Safe N Sound make a difference ?



Here is the plan of my basement as requested.
Italbro is offline  
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