I want to replace the fiber tiles with drywall. The ceiling is made up of 2x2 16 on center, I plan to use 12' long pieces less seams. What thickness of drywall is safe to use. Thank you for any information you can provide.
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1You have 2x2 ceiling joists? Are you sure? Or are you talking about 2x2 furring?– HuesmannCommented Jan 21 at 19:35
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1Is that 2x2 furings on ceiling joists?– crip659Commented Jan 21 at 19:35
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If they are ceiling ‘joists’ (as opposed to perpendicular furring), what’s the clear span?– Aloysius DefenestrateCommented Jan 21 at 20:44
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And if you specified the size of the ceiling, we could offer opinions about 12’ vs 8’ sheets.– Aloysius DefenestrateCommented Jan 21 at 20:45
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1 Answer
ASTM C840 specifies about everything for by-the-book drywall. For 16" support spacing and insulation supported by the drywall, Table 2 prescribes a minimum thickness of 1/2". Without insulation supported by the drywall, it's 3/8" minimum thickness. The long edge of the drywall sheets must run perpendicular to the support framing.
