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Old 12-24-2009, 02:28 PM   #1
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Gaps between sheets - new installation


I've got some gaps between sheets in my new ceiling install. My question is how much gap is acceptable before I have to pre-fill these before taping? The gaps are generally 1/4" - 3/8". If I need to prefill, what is the best material to use?

Rock is 5/8" if that matters.

Thanks in advance.

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Old 12-24-2009, 03:38 PM   #2
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Gaps between sheets - new installation


Gaps? Fire the drywaller. Fill with durabond 90, not premixed compound. Fill every gap of any size.

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Old 12-24-2009, 03:50 PM   #3
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Gaps between sheets - new installation


4.6.6 Gypsum panel products shall be abutted so as to be in
contact with one another but not forced together.
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.gypsum.org/pdf/GA-216-07.pdf
This should answer most other questions: floating ceiling or wall corners; prime before and after texturing; screw pattern, length, etc.....

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Old 12-25-2009, 09:52 PM   #4
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Gaps between sheets - new installation


Thank you for your quick responses and the reference to the gypsum doc.
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Old 12-27-2009, 06:35 PM   #5
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Gaps between sheets - new installation


Quote:
Originally Posted by diykc View Post
Thank you for your quick responses and the reference to the gypsum doc.
You will always have some gaps I don't care how good a rocker you are it happens, if they are not to wide forget the quick set and use some all purpose. You will be fine as long as they are no more than 3/8" just make sure it is dry before it is taped. Use it straight from the box or pail do not add water.. Quick setting mud works great but for a beginner it is easy to leave to much on causing a lot of problems when finishing. When you do pre fill pull the mud tight to the board do not try to build it up.
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