Author Topic: 7/8 vs 1 1/2" hat channel furring strips  (Read 4425 times)


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7/8 vs 1 1/2" hat channel furring strips
« on: May 07, 2016, 08:03:57 PM »
I am replacing a drop ceiling in a mother-in-law basement suite with a drywall ceiling.   Due to some plumbing that runs below the joist I cannot attach the drywall directly to the joist.  I was going to use the opportunity to add hat channel attached to sound isolation clips.  I would need to use 1.5" hat channel instead of the normal 7/8" hat channel.  The 1.5" is also available in 25 gauge, but I can't find any data on any ceiling assemblies on how it would affect sound transmission.  Would the STC be comparable, or would the increased stiffness of the 1.5" channel cause a decrease in decoupling?  Also, if the channel is placed 16" OC would the distance between the clips need to be increased?  If so, would this be a problem for some of the cheaper isolation clips as they would be carrying more weight?


Randy S

  • Guest
Re: 7/8 vs 1 1/2" hat channel furring strips
« Reply #1 on: May 09, 2016, 03:23:27 PM »
The height of the hat channel doe not matter, the gauge for ceiling however would..
I would recommend 20 or 22 gauge for the ceiling.

For single layer drywall it would be 16" OC spacing for the channel and max 48" between clips.
for double drywall (recommended) 24" max OC for the channel and same max 48" for the clips.

I would only recommend using the clips that we offer on our website, other clips we would not recommend.

Randy S.