sister boards???

Old 09-14-08, 08:04 AM
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sister boards???

I"m installing a garage ceiling that had a ceiling before, but I'm using a much heavier 5/8 sheetrock and wonder if I need to support the 4 foot edge with a wood plate underneith in order to keep the screws to be at least 4 inches apart all around? Is this a sister board or butt plate? Must it be a 2x4? , would a 1x4 between each 16" space at the end of the sheetrock be enough?Would this underneith wood plate have to be nailed to the 2x4's?
Old 09-14-08, 08:03 PM
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I read your question several times, and I'm not quite following your thought...

The 4' side of your drywall usually ought to have solid backing, because it should usually land directly on the center of a ceiling joist on each end. The long dimension of your drywall will be perpendicular to the joists. So if your drywall is 8' long, it will be fastened every 16" to the joists, whereas the 4' side of your drywall will end in the center of the joist. If, for some reason you aren't ending right in the center of the joist, and you need to add on some additional framing, you'd just sister some additional framing onto the existing joist.

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