85-03-01205
ML-SERIES FIREPLACE
Page
27
3.2.1
Suitable Mantel, Facing & Hearth Pad Materials
Materials used in areas designated as non-combustible must be rated as non-combustible per NFPA 220 Standard on Types of
Building Construction, or reported as passing ASTM E 136, Standard Test Method for Behavior of Materials in a Vertical Tube
Furnace at 750 Degrees C.
WARNING: Common Finishing Materials Not Approved for use.
Paper faced gypsum board (drywall) including Type X Fire Rated board is not a non-combustible material. These boards are
not approved for use in the non-combustible zone of the fireplace.
WonderBoard brand boards are commonly used as a backerboard for tile. WonderBoard backerboard is not a non -
combustible material and is not approved for use in the non-combustible zone of the fireplace. In addition, WonderBoard
off-gasses when heated and should not be used anywhere near the fireplace.
Information for common materials used is given below. It is recommended that finishing material used on the wall over the
fireplace has a depth of at least 1”. This is the depth of the finishing guides on the fireplace and will result in the best
final
appearance. Mendota does not guarantee any materials used around the fireplace. Mendota disclaims any and all liability for
any damage to finishing materials including warping, discoloring, cracking, peeling or flaking. This also includes any off -gassing
or unpleasant smells from materials when they are heated.
3.2.1.1
R-Values of Common Finishing Materials
R-Values of Hearth Pad Boards
Material
Thickness
R-Value
Application
Mineral Fiber Board (Micore 160, 300, SB)
1/2"
1.2
–
1.4
Only approved for use as an insulator
under other non-combustible finishing
material for a hearth pad.
Do not use on the face of a fireplace or
wall.
Cearmic Board (Rescor 360)
1/2"
1.11
Cearmic Board (Fiberfrax Duraboard LD)
1/2"
1.10
R-Values of Common Finishing Materials
Material
Thickness
R-Value
Application
SkamoEnclosure Board
1”
0.410
Best option for a smooth wall finish. Least chance
of cracking from heat.
Promat Promafour
1”
0.410
Cement Board (Hardibacker 500)
1/2"
0.200
Best used as a backer board for tile or natural
stone installations.
Not recommended as a smooth wall finish unless
used with a Cool Wall heat transfer system.
Cement Board (Hardibacker)
1/4"
0.130
Common Brick
2-1/4"
0.450
Common non-combustible materials used around
a fireplace. Can be used on the wall or hearth
pad. Install these materials per the
recommendations in the following sections.
Common Brick
4"
0.800
Thinset Mortar
1/4"
0.100
Concrete (150 lbs/Cubic Foot)
1"
0.07
Ceramic Tile
1/4"
0.25
Flagstone
1"
0.079
Granite
1"
0.05
Limestone
1"
0.08
Marble
1"
0.08
Sandstone
1"
0.079
Slate
1"
0.100
Содержание ML39- AA-11-04391
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