Drywall · 1 of 7
The board in every rated assembly. Stocked in the lengths that get used, not the lengths that fit on a spec sheet.
OUTWEST1995Five Colorado yards.
One outfit.
5/8" Type X — 4×8, 4×9, 4×10, 4×12
5/8" Type C — by order
1/2" Type C — 4×8, 4×12
Glass-mat sheathing — exterior, for behind stucco and cladding
StockedLonger lengths and 54" wide board are a special order. Ask and you get a real date.
Both are fire-rated. The 1/2" fire-rated board is Type C; at 5/8", the board may be Type X or Type C. Type C has more glass fiber and additives that hold the core together longer once it starts to calcine, and certain UL assemblies — especially horizontal ones and shaft walls — call for it specifically. Send us the UL number and we will pull the right board.
National Gypsum · American Gypsum. USG and Georgia-Pacific by order.
Common questions
Not on the rack. Twelve is the longest we stock; anything longer is a few days out.
No. The board type and thickness must match the tested assembly. Our 1/2" fire-rated board is Type C; 5/8" may be Type X or Type C. Check the UL listing before you substitute.
Type C holds up longer in a fire. Some assemblies require it. If the print says C, use C.
By order. Our stocked board is American Gypsum and National Gypsum; if the spec names USG or GP we can get it in a few days.
The branch makes the call