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17
Majestic Fireplaces® SR/SC Series
COMMON MATERIALS AND FACTORS
MATERIAL K*
R
MINIMUM
THICKNESS
EH2416
Common Brick
0.458
5.0
1.09 0.50 in.**
0.10 5.46 in.**
(Majestic Products
Company)
R Value is for ¹⁄₂ inch.
* Units of K = BTU/SQ FT/HR/˚F/IN
** Thickness of Listed Material
FP533ADD
Example of Determining Hearth Extension
Equivalents
To determine the thickness required for any new
material:
NEW
required
thickness
K of new material (per inch)
K of listed material
(p
er inch
)
thickness
of listed
material
=x
Example for Common Brick
T (new) = 5.0/0.458 x 0/50 in. = 5.46 in. (new required
thickness).
Fig. 24 Hearth extension material factors.
FP550
Fig. 25 Sealing gaps.
WALL COVERING
NONCOMBUSTIBLE
DECORATIVE
FACING
NONCOMBUSTIBLE
DECORATIVE
COVERING
Seal all cracks
between fireplace
surround and wall
materials with
noncombustible
material.
Seal crack
between fireplace
and hearth extension
with noncombustible
material.
2x4" HEADER -
Do not notch at
standoffs.
SAFETY STRIPS -
Must be overlapped
¹⁄₂" minimum.
HEARTH
EXTENSION
INSULATION
SIDE VIEW