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Old 07-29-2009, 08:31 PM   #1
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Drywalling Garage


Have a single story house with an attached garage. The wall connected to the house has 5/8 drywall, floor to peak, sealing the garage from the house attic. Rest of garage is open framing.

Is it OK to use regular 1/2 drywall on the remaining garage walls and ceiling?

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Old 07-29-2009, 08:38 PM   #2
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Drywalling Garage


Is there any living space above the garage?
If so 5/8" required on the ceiling

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Old 07-29-2009, 08:53 PM   #3
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Quote:
Originally Posted by Scuba_Dave View Post
Is there any living space above the garage? If so 5/8" required on the ceiling
spiders live there ... "Have a single story house" ...
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Old 07-29-2009, 11:35 PM   #4
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Drywalling Garage


As long as the drywall on the ceiling is not getting any water based spray texture and the sheets are installed perpendicular to the framing, either 16" or 24" on center. Otherwise, 5/8" is required according to the manufacturers that write the application codes. Page 3, table 1, footnote B: http://www.gypsum.org/pdf/GA-216-07.pdf Your local jurisdiction may state differently. Be safe, G
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Old 07-30-2009, 07:45 AM   #5
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Drywalling Garage


In our area...ceiling AND connecting walls must be 5/8". Check with your local code officials to be certain.
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Old 07-30-2009, 07:46 AM   #6
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Drywalling Garage


Thanks for the info and document. It will be useful.

I think I'll just go with 5/8 since I may decide to texture the ceiling later.
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Old 07-30-2009, 11:10 AM   #7
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Drywalling Garage


Scuba Dave's right on as far as the code goes. The IRC code requires 5/8" on the garage ceiling only if there is habitable space above. The wall does not require 5/8" rock in any circumstance in the code.
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Old 07-31-2009, 01:20 PM   #8
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Good choice, zpm. That is exactly why I stated the manufacture's application code, in case you put up 1/2" and textured it. Many houses I've had to frame drywall backing on the attic truss over the living space garage wall, in order to drywall to the peak on the truss for fire stop (as you posted). Builders found it cheaper than to drywall (5/8") the larger garage ceiling for fire stop.

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