Interpretation #6977
Published April 27, 2012
Original Request
- Code Version
- 2007
- Code
- RESIDENT
- Code Description
- Residential
- Chapter
- 7
- Section
- R702.3.5
- Topic
- Gypsum Board
Question
Is it the intent of table R702.3.5, footnote D to refer to regular gypsum board with a joint compound-based texture material, i.e., knock down, stippled, etc. only or would it also require blue board, (commonly referred to as plaster board) with gypsum veneer plaster, (hard cote)to be of a minimum 5/8 thickness when installed on 24 inches on center framing?
Answer Published 04/27/2012 at 4:43 PM
Footnote D requires either 5/8 or 1/2 inch sag resistant
board to be used in the specified circumstances. It does
not require Blue board
board to be used in the specified circumstances. It does
not require Blue board
Commentary
This requirement applies if using a water-based textured
finish on a ceiling where the min thickness of the drywall
for framing members 16" on-centers is 1/2" and the min
thickness of the drywall for framing members 24" on-centers
is 5/8" or 1/2" sag-resistant gypsum board.