No-Sag Ceiling
Anew type of 1/2-inch drywall
promises to eliminate ceiling sags on
24-inch on-center framing. Domtar's
CD Ceiling Board has a three-layer,
"controlled density" gypsum core. The
outermost layers on each side are
denser than a conventional gypsum
board core. The inner layer is lighter.
The overall reported effect of this
"controlled density" core is a more
rigid board that is only slightly heavier
than standard drywall and snaps
cleaner when cut. With the increased
density, the new board may have better
sound ratings, but at press time the
product was still being tested. There is
no increase in the fire rating of the
CD Board, though Domtar reports
that a 1/2-inch fire-rated product will
be available soon. CD