I have a ceiling with 24 OC trusses. The ceiling was covered with 1/2 inch drywall. It was fastened with screws every 12″ along the edge and field. My question is will this eventually sag? Should they have used 5/8″ drywall? I have read some books that say 5/8 is best but 1/2 is fine. Who is correct ? Could someone please give me a little help.
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story
Choosing windows, doors, HVAC, plumbing systems, and finishes with sustainability and healthful materials in mind.
Featured Video
Highlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Replies
Rule of thumb for ceilings 24" o.c. is 5/8", also should be fire-rated. 12" screw spacing in the field is fine, altho 6" is more like it for the seams. There may be some sag with the 1/2", oblique light angles may make it visible; also, use dead flat paint on the ceiling, white or light colors.
Ken Hill