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Planning
Plan Wall Finish
Non-Combustible Materials Specifications
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 Specifications
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.
Non-combustible cement board
The LX2 fi replace requires a 1/2" (13 mm) thick non-
combustible cement board to be used as a wall surface
immediately above the unit opening in the front and
above and behind the opening on each side.
Extending the cement board well beyond the minimum
will help avoid cracking due to diff erential expansion of
materials.
Pre-drill cement 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 cement board.
Non-combustible finishing over cement board
Additional non-combustible material such as tile, etc.,
may be applied over top of the cement board or you
may choose to leave it fi nished clean with no tile.
Wall Finish
17
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