Figure 8
14
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
The screws should be driven through the cement board into the outer
metal skin of the fireplace . The sheetrock (drywall) is then butted up to the
cement board . The sheetrock above the fireplace should also be fastened
to the fireplace by driving screws into the outer metal skin of the fireplace .
Facing Less Than 1" Thick:
If the combined thickness of the facing
material (eg . 3/8" [9 .5 mm] thick ceramic tile and 1/2" [13 mm] thick ce-
ment board) is less than 1" (25mm), then the tile can be placed behind
the fireplace face (see below) .
Facing Installation Considerations
Non-combustible cement board (such as Wonderboard, Durock, or Har-
dybacker) must extend 10" (254 mm) above the 1" (25 mm) top reveal
and a minimum of 3" (76 mm) from each side reveal (see
Figure 8
)
. This
cement board may be 1/4" (6 .3 mm) thick or greater, but would normally
be the thickness of the drywall - for example 1/2" (13 mm) . The cement
board may be fastened by drywall screws .
Cement Board
3/8” Tile and 1/2” Cement
Board Behind Fireplace Face
Cement Board - a minimum
of five inches wide.
Sheetrock
1” Reveal
5” (127mm)
Minimum
Sheetrock
3" (76mm)
Minimum
Cement Board - Minimum
of 3" (76mm) Wide
10" (254mm)
Minimum
3/8" (9.5mm) Tile
and 1/2" (12.7mm) Cement Board
behind Fireplace Face
Sheetrock
Cement Board
1" Reveal
(25mm)
Sheetrock
Summary of Contents for RAVELLE 42
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