Should I rock over the plywood?

Old 05-20-12, 11:58 AM
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Should I rock over the plywood?

Someone put 1/4 plywood on the ceiling of the bedroom of my home that was built in 1941. It is an addition to the original house and in good condition using box nails it is secured well to the ceiling joists using a pretty uniform though not code nailing convention. My question is should I just rock over it probably getting frustrated with screws hitting nail heads from time to time or pull it all down to the joists? And if so is 1/4" rock thick enough or should I go 3/8"?

Thanks in advance.

Last edited by drumz; 05-20-12 at 12:21 PM.
Old 05-20-12, 04:01 PM
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Generally you use 5/8" sheetrock on ceilings, because anything thinner will sag under its own weight between rows of fasteners. There is really no advantage to taking the 1/4" plywood down provided you can locate the joists and use longer screws (2"). Screws into the plywood alone is not sufficient. Leaving the plywood will also allow any attic insulation to stay in place.

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