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I'm hanging drywall for a basement ceiling using 5/8". For areas where there are heat ducts in the ceiling is it OK to have the screws 24" apart?

Thanks!
 

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Depends on the application. With no glue-- Single nail or screws =7" edges, 7" field.
Double nail or screws- = 12"o.c. w. 2- fasteners 2----2-1/2" apart

With glue --- Framing 16" o.c. - 16" nail or screw
Framing 24" o.c. - 12" nails, 16" screws

Find it here, page 9: http://www.gypsum.org/pdf/GA-216-07.pdf

Be safe, G
 

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Definitely use adhesive. You can use fewer fasteners thus less chance of screw/nail "pops" down the line and makes for a more solid job all around.....
 

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5/8ths drywall is hung on 24 centers all the time. juts make sure you hang the drywall in the right direction. do not railroad the sheets or it wont matter how many fasteners you put in. the weight will cause it to sag overtime.
 
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