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Old 04-08-2013, 12:32 PM   #1
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Caulking between drywall


I have a few small .5" gaps between my ceiling and wall. I plan on putting up crowns anyway, but I wanted to insulate it.

What should I be using? I'm completely clueless when it comes to this. A low expansion foam?

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Old 04-08-2013, 12:36 PM   #2
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Caulking between drywall


Normally, you would tape and mud those corners. Unless the walls were decoupled for a soundproofing installation, then you would use an acoustical sealant. That's not to say that caulk wouldn't seal that gap..


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Old 04-08-2013, 12:46 PM   #3
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Caulking between drywall


Mud was applied to all the bedrooms but not to this main living room because we're were putting up crown mouldings and wanted to save some money.
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Old 04-08-2013, 02:15 PM   #4
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Caulking between drywall


half inch gaps hot mud and paper tape. will seal it up just fine and won't crack.
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Old 04-08-2013, 04:34 PM   #5
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Caulking between drywall


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Mud was applied to all the bedrooms but not to this main living room because we're were putting up crown mouldings and wanted to save some money.
How much did you save by going that route?
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Old 04-08-2013, 04:47 PM   #6
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Caulking between drywall


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half inch gaps hot mud and paper tape. will seal it up just fine and won't crack.
Sorry, hot mud? ........... for us clueless guys.
Thanks,
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Old 04-11-2013, 01:28 AM   #7
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Sorry, hot mud? ........... for us clueless guys.
Thanks,
No problem every one is learning it is mud you mix that has a chemical reaction with the water less srinkage and stuff here is the link to USG http://www.usg.com/sheetrock-durabon...-compound.html
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Old 04-11-2013, 07:17 AM   #8
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No problem every one is learning it is mud you mix that has a chemical reaction with the water less srinkage and stuff here is the link to USG http://www.usg.com/sheetrock-durabon...-compound.html
Thanks.

I guess the reaction warms it up thus the "hot mud" term.
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Old 04-11-2013, 08:46 AM   #9
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Caulking between drywall


If you are putting up crown, a good acrylic latex will work fine to seal the gap as well prior to the crown installation.

Hot mud...

Maybe I am just a guy with a simple sense of humor but that make me chuckle.
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Old 04-11-2013, 02:12 PM   #10
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Caulking between drywall


Just be sure it is fire-rated caulk, especially if leaving a gap between crown/ceiling; http://www.google.com/#hl=en&sclient...iw=853&bih=489

"4.6.7 When gaps occur at gypsum panel product joints, they
shall be not greater than 1/4 in. (6 mm) and shall be prefilled
with joint compound as specified in Sections 4.6.7.1 and
4.6.7.2.
4.6.7.1 Gaps not greater than 1/8 in. (3 mm) shall be prefilled
with either ready-mix or setting-type joint compound.
4.6.7.2 Gaps greater than 1/8 in. (3 mm) shall be prefilled
with setting-type joint compound." From; http://www.lafargenorthamerica.com/G...%20English.pdf

That way you keep the fire rating of the wall/ceiling drywall used in houses just for that purpose; to keep the wood framing from burning.

Gary

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