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Old 12-20-2011, 12:23 PM   #1
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sheetrock on ducts


Can I glue sheet rock directly to cold air returns in basement? I am trying to keep my headroom

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Old 12-20-2011, 12:55 PM   #2
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sheetrock on ducts


might work? but may get moisture?

as always, just my thoughts.

good luck

coupe/Larry

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Old 12-20-2011, 01:32 PM   #3
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sheetrock on ducts


I would use a 2 X 4 frame around it or the rock may not stay stuck and fall down.
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Old 12-20-2011, 01:37 PM   #4
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sheetrock on ducts


Make the soffit work out of 1/2" ply or osb--with 2x2 corners--fast inexpensive and straight.

Duct work should never be used to support anything---they are not hung properly for that purpose.
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Old 12-20-2011, 02:46 PM   #5
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sheetrock on ducts


I framed ladders on each side of the return, flush with the u/s. Drywall spanned between. Worked great.

Last edited by Marvel; 12-20-2011 at 02:50 PM.
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Old 12-20-2011, 03:06 PM   #6
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sheetrock on ducts


You are concerned with losing headroom, correct? Why can't you just add framing along the sides of the return so that they are only an 1/8" lower than the return and screw the sheetrock to the framing, and span the return?

This way you would only lose 1/8" + the thickness of sheetrock 5/8" or 1/2".
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Old 01-30-2012, 03:31 PM   #7
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Originally Posted by <*(((>< View Post
You are concerned with losing headroom, correct? Why can't you just add framing along the sides of the return so that they are only an 1/8" lower than the return and screw the sheetrock to the framing, and span the return?

This way you would only lose 1/8" + the thickness of sheetrock 5/8" or 1/2".
This is my situation and I was thinking of spanning the drywall between two ladders on either side of the duct but the span would be 22" and although it would be supported on the ends via clips as well as the seams of the drywall on the wall I am concerned about sag in the middle (long term) and maybe some condensation or noise issues.

My current solution now is to use 1/2" MDF instead of drywall for strength, Install a 6 mil vapor barrier for condensation (just in case), as well as some acoustic sealant between the two to isolate any vibration.

Any feedback would be appreciated

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Old 01-31-2012, 09:57 AM   #8
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sheetrock on ducts


22 inches is nothing to worry about. After all most ceiling/roof trusses are placed at 24 inches o.c.
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Old 01-31-2012, 04:39 PM   #9
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sheetrock on ducts


You could use 1/2" ceiling drywall, it is stiffer then regular 1/2"
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Old 01-31-2012, 10:53 PM   #10
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sheetrock on ducts


Oh yes, I had to look that one up because I thought it allowed you to install drywall in either direction but as it turns out it is also acceptable to have a 24" span. Sweet!!

http://www.usg.com/sheetrock-sag-res...ing-board.html

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