15
Installation Planning
Wall Finish
Material Specifi cations
Non-Combustible
Material which will not ignite and burn. Such materials
are those consisting entirely of steel, iron, brick, tile,
concrete, slate, glass or plasters, or any combination
thereof.
Materials that are reported as passing ASTM E 136,
Standard Test Method for Behavior of Materials in a
Vertical Tube Furnace at 750°C shall be considered
non-combustible materials.
Combustible
Materials made of or surfaced with wood, compressed
paper, plant
fi
bers, plastics, or other material that
can ignite and burn, whether
fl
ame proofed or not,
or plastered or unplastered shall be considered
combustible materials.
D
Min. 48” (1219 mm)
E
M
in. 47-3/8”
(1203 mm)
D
D
Flush with bottom of unit;
add extra cement board
if overlapping framing.
Minimum coverage area of non-combustible board.
Any
wall
finish applied to shaded area must be non-combustible.
LT1 fireplace outline
(including stand-offs)
Non-combustible
board required
thickness:
1/2 inch (13 mm)
A
B
C
Joints preferred at corners
to prevent cracking
Minimum Non-Combustible Board Dimensions
Non-Combustible Board
The LT1 Linear
fi
replace requires a 1/2” (13
mm) thick
non-combustible board to be used as a wall surface
immediately surrounding the unit’s opening—see
diagram for minimum coverage.
Extending the non-combustible board well beyond
the minimum shown will help avoid cracking due to
di
ff
erential expansion of materials.
Pre-drill non-combustible board with oversized holes
and do not over-tighten screws to avoid cracking due to
heat expansion.
Standard gypsum wall board may be used beyond the
perimeter of the non-combustible board.
inches [mm]
With 2575 trim
With 2530CIK trim
A
Min. 20-1/2 [521]
Min. 20-1/8 [511]
B
19-1/2 [496]
21 [533]
C
Min. 8-11/16 [221] Min. 8 [203]
D
Min. 4 [102]
Min. 3-3/8 [84]
E
Min. 39-7/8 [1011] Min. 41-1/8 [1045]
