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Using Resilient Channels

Installing drywall panels onto resilient channels is one of the first lines of defense against sound transmition through walls or ceilings.

Here is a summary overview of their use.  Notice there are more details in one of the videos which follow.

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Marc LeBouthillier on October 16, 2018 06:16

Hi Jon,
I am using resilient channel on a ceiling for sound and fire proofing. It will be from wall to wall and the interior walls build after. My question is how to attach the interior walls to the ceiling with the channels. I could not find any information on this.

Hello Marc,
If you were only working on a sound barrier, the trick is to use permanently flexible sealants, like silicone or polyurethane to seal the ceiling to the outer walls, and then again to seal the inserted walls to the floating ceiling. If you need some mechanical attachment at the top, put blocking behind but not in contact with the floating ceiling and then drive long screws upward from the new wall to the blocking. That leaves very little contact with the floating ceiling panel, hence little sound transmition.

But you say sound AND fire proofing. That is more complicated because these flexible caulking products are not fireproof. There exist fireproof gasket like materials designed to expand in a fire and close off the space around plumbing pipes, electrical wires or other passageways through a fire wall, some even collapse and close the pipes, very destructive but good fire blocking. Judicious use of these materials could do the trick, but you do need to check local code about what is acceptable to maintain a true "fire wall". I suspect that the fire requirements will compromise the soundproofing to some extent -- unless you can get all the fireproofing you need before putting up the soundproofing ceiling.

jack on March 27, 2018 10:47

used metal channel 25 years ago in 100 apt units channels are rubbing against nails causing sqeeks this is in cielings how to solve

Hello Jack,

I have never heard of this so I am hoping someone else looking at Resilient Channels may have some experience with this. When does it squeak – when people walk upstairs? Are you sure it is the channels making the noise and not the floor boards?

If in fact the screws from the drywall into the channels are causing the problem you could simply add more screws.

If the screws going up into the wood are making the noise that could be another problem but I can’t imagine those screws coming loose unless you had used very long screws into wet lumber. See the explanation of nail-popping in the video list on the left -- Repairs - Nail-Pops.

The only way I can think of cinching up those screws without removing the ceiling would be to do observe the screw heads or use a metal detector set to very shallow to locate the resilient bar face against the drywall, then test to find which side of that is where the mounting face of the bar is located. Then either drill clearance holes in the drywall, or simply drive drywall screws right through the drywall and sink the head all the way up to squeeze the bar tight against the joist above. You may need a small exploration hole to orient you and find the joists. You have to decide if patching all those holes is better or worse than pulling the drywall down.

Anyone out there have any experience with this squeaking on a ceiling?

jon

Gordon Chew on May 07, 2014 22:01

Jon,
We are restoring the historic Snyder Mercantile building in Tenakee Springs, Alaska. The owner's residence is upstairs so we have resilent channels crossing the joists, 5/8" drywall then goes on then 5/8" of old growth recycled fir t&g. My question is about fastening the t&g. We don't want to screw it to the joists which would defeat the resilient channel concept I reckon. Can we just glue it with construction adhesive and throw a finish nail through the tongue into the channel to hold it until the glue sets up?

Really appreciate your opinion on this.
Thanks , Gordon

Hello Gordon,
Yes you can glue the t&g to drywall. If you want to avoid the finish nail -- use Quick Grab adhesive. No nails needed.
-- Jon

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