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Old 07-02-2012, 02:35 PM   #1
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Drywall over thermopan

I am finishing my basement and we are going to be drywalling right to the floor joists. My question is whether I should remove the thermopan for the cold air returns or leave it in place. I am worried if I leave it in place you will see it after the drywall is up. Thanks for the help in advance.


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Old 11-21-2012, 11:08 AM   #2
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Bumping up because I'm wondering the same thing. I'll probably end up removing the Thermopan because it sure seems like it would cause the ceiling to be obviously uneven.


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Old 11-21-2012, 11:17 AM   #3
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I'd leave it in place and shim the joist so there was 0 contact with it when installing the rock.
It's very common to add strapping to the bottoms of the joist instead of attaching to them.
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Old 11-25-2012, 11:21 PM   #4
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If I'm right the thermo pan is only 1/8 thick so who is going to notice that?
Wood floor joists before I joists will vary by more than 1/8 from joist to joist and wall studs will vary more than that with crowning
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Old 12-05-2012, 03:23 PM   #5
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The pan material itself isn't generally a problem. If it was installed with the screws HVAC guys normally use, that might be an issue as they hang below the joist 3/16" to 1/4". I assume that's what you're worried about. I normally change out the screws with some flay head wood screws before I hang. That should solve the problem....
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