26
Step 9. FinishingFigure 28 shows the minimum vertical and corresponding
maximum horizontal dimensions of fireplace mantels or other
combustible projections above the top front edge of the
fireplace. See Figures 2 and 3 for other fireplace clearances.
Only non-combustible materials may be used to cover the
black fireplace front.
WARNING: WHEN FINISHING THE FIREPLACE,
NEVER OBSTRUCT OR MODIFY THE AIR IN-
LET/OUTLET GRILLES IN ANY MANNER.
!
Figure 28.
Minimum Vertical and Maximum Horizontal
Dimensions of Combustibles above Fireplace
CAUTION: IF JOINTS BETWEEN THE FINISHED WALLS
AND THE FIREPLACE SURROUND (TOP AND SIDES)
ARE SEALED, A 300° F. MINIMUM SEALANT MATE-
RIAL MUST BE USED. THESE JOINTS ARE NOT RE-
QUIRED TO BE SEALED. ONLY NON-COMBUSTIBLE
MATERIAL (USING 300° F. MINIMUM ADHESIVE, IF
NEEDED) CAN BE APPLIED AS FACING TO THE FIRE-
PLACE SURROUND. SEE THE DIAGRAM BELOW.
Hearth Extensions
A hearth extension may be desirable for aesthetic reasons.
However, ANSI or CAN/CGA testing standards do not require
hearth extensions for gas fireplace appliances.
Figure 29. Sealant Material
HIGHTEMPERATURE
SIDESEAL JOINT
(300 F/149 CMIN.)
TOP&
OO
0
0
FINISHWALL MATERIAL MAY BE DRYWALL
-TOP AND SIDES
0
2” 4" 5” 6” 7” 8” 9”
2"3" 4"5"
12"
11"
10"
9"
8"
7"
6"
TOP FRONT EDGE
OF FIREPLACE
3”
11”12”
10”
31”
CEILING
1
1