Valor 1100JN Installation & Owner's Manual page 31

Minimum Non-Combustible Board
Dimensions
Minimum coverage area of non-combustible board.
Any wall fi nish applied to shaded area must be non-
combustible. We recommend extending the non-
combustible board well beyond the size shown to
avoid cracking due to diff erential shrinkage
—see page 43.
Non-combustible
board required
thickness:
1/2 inch (13 mm)
Framing Requirements
Min. 39-1/2" (1003 mm)
QUALIFIED
INSTALLER
31