We built a bedroom in the basement and although we used ROXUL Safe and Sound insulation, there is still a lot of noise coming through. The ceiling is drywall but we did not use the resilient channels. What is the best way to correct this? Should we remove the ceiling and re-install drywall using resilient channels? Or can we just install a second layer of drywall over the existing drywall ceiling? Note, there is ductwork going through the ceiling as well, does this have to be handled differently? Thank you.
Pattie, The space between the ceiling and the floor above can be as much as 14". (depending on the type of floor joists you have). The wood also carries sound, but the area should have a decent amount of sound proofing with the Roxul product. Additional drywall will help, but also consider that it will double the weight of the ceiling. My preference would be to add a dropped ceiling as this removes direct contact with the wood joists, provides an air space and also acts as a sound reduction membrane. I would leave the existing drywall and just extend the vents and any lighting.
Sound travels slowest through air, faster through solid material (your physicsl home itself) and fastest through water.
To increasing the sound proffing of your home, you will get the best bang for your dollar spent by putting carpet on the floor above you. Minimized the sound of footsteps and scaping chairs. Too late ro add more material. The science of sound travel wont support it.
Hi there. I have read through all your responses and am very surprised no one recommended the silentfx drywall. It is equivalent to 6 sheets of drywall in a 5/8" thick sheet. I would keep the existing 1/2" drywall you have, add resilient channel and the silentfx drywall. This is what I've done on many jobs and have never had a complaint
Have you tried Mass Loaded Vinyl? It consist of two main elements, the vinyl part provides flexibility, and a high mass element acts as a sound barrier. Google it, it usually helps.
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