Heat & Glo RED40-NNN Installation Manual page 44

SIDE FINISH NON-COMBUSTIBLE
BOARD (2)
47 IN. WIDTH
FACTORY INSTALLED NON-COMBUSTIBLE BOARD
= NO SCREWS IN THIS AREA
Figure 10.1 Finishing Details
Note: It is acceptable to use a high temperature silicone
sealant to adhere drywall to lower cover panel.
Finish and Sealing Joints
All joints between the fi nished wall sheathing and the ap-
pliance must be sealed with non-combustible materials.
Sealants, such as caulk or mastic used to seal the gap
between the wall and the fi replace, should be rated at a
minimum continuous exposure to 300ºF.
Finishing Around Opening with Gypsum Wallboard
Gypsum wallboard (drywall) joints adjacent to the fi re-
place opening, including the non-combustible board on
the appliance, require special attention to minimize crack-
ing. When installing gypsum wallboard around the fi re-
place, install the hole for the fi replace opening in a single
wallboard sheet, if possible. This will minimize the joints
adjacent to the fi replace opening.
Tape wall board joints around the fi replace opening with
fi berglass-mesh tape. It will provide a more crack-resis-
tant joint than paper tape. Fill, smooth and fi nish wall
joints with chemically setting-type joint compound. It will
provide a more crack-resistant joint than air-drying light-
weight compound.
Painting
If desired fi nishing includes a painted wall, 100% acrylic
latex with compatible primer is recommended around this
appliance. Oil-based or standard acrylic paints may dis-
color due to heat exposure.
Heat & Glo • RED40-NNN,RED40-NM, RED40-LM, RED40-NNN, RED40ST-LM, RED40ST-NM Installation Manual • 2155-975 Rev. E • 12/14
44
33-1/2 IN. HEIGHT
FACTORY INSTALLED
NON-COMBUSTIBLE BOARD
= 2 IN. MAX. SCREW LENGTH
Facing Material
• Facing and/or fi nishing materials must not interfere with
air fl ow through louvers, operation of louvers or doors,
or access for service.
• Facing and/or fi nishing materials must never overhang
into the glass opening.
• Observe all clearances when applying combustible
materials.
11-1/4 IN.
3-1/2 IN.
3-1/2 IN.
7-1/4 IN.
1/2 IN.
1 IN.
Figure 10.2 Framing and Framing Materials-RED40
COMBUSTIBLE
FRAMING
1/2
IN. THICK
WALL SHEATHING
20-3/4 IN.
FACTORY-SUPPLIED
NON-COMBUSTIBLE
BOARD (2)
NON-COMBUSTIBLE BOARD
ON FRONT FACE (SIDE VIEW)
= AIR SPACE