I am replacing a ceiling in a room that will be more or less 6' x 12'. The
ceiling joists are 11-7/8 I joists running perpendicular to the 12' axis on
24" centers. The rest of the house is over 40 years old and has 1/2" drywall
running perpendicular to trusses that are on 24" centers. I always thought
you should use 5/8" on a ceiling when joists were on 24" centers.
I will be replacing more ceiling in the future so should I continue with the
1/2" on 24" centers, use 5/8" on 24" centers, or install strapping on 16"
centers and use 1/2"? What would the pro's do in this situation?
Type X is fire rated, but all 5/8" drywall is basically fire
resistant due to the nature of gypsum. If you want higher
fire resistance, then type X is used and if you need a higher
rating, then type C.
Well, I guess maybe I should do some checking with the local COE to see what
the codes require in NY State. I did not know there were all these different
types of drywall. Always thought there was regular and green board only.
Might as well put in what code requires even though there most likely will
not be any inspection since it is a remodel. Thanks to all that replied, I
have learned quite a bit about drywall in a very short time.
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