12-23-2009, 10:33 AM
quote:
Originally posted by Carey...
Pre-planning ways to really diminish all metal roof noises would be to not have a metal roof, or go with a very heavy roof deck (some of the very quiet systems I have seen here use a roof deck of T&G 2x4's , 3/4 plywood, then the roofing metal... this is a very heavy & $$$ way to go, but it is pretty quiet....)
This is also way too much load, and cost - you can achieve the same sound attenuation with bat insulation if you have an attic at a lower cost and dead load.
SH - is your ceiling open beam or sheet rock? For new construction if you use 5/8" sheet rock on the ceiling you get more sound deadening.
Breaking up the sound waves with an uneven surface is a good way to dampen the sound.
I am only a amateur - the person we need here is Jerry M who did sound systems before he retired and has the ear!