Hearth & Home Outdoor Lifestyles TWILIGHT-IFT NG Installation Manual page 17

Apply housewrap or building paper
For placement of combustible housewrap or building pa-
per and non-combustible sheathing for the exterior wall
see Figures 5.5 and 5.6.
Special care should be taken when choosing building
materials for weather proofing (i.e. building wraps, seal-
ant tapes, liquid sealants, rubberized flashings, etc.).
All sealant materials or building wraps installed within 6
inches of the top and 1 inch on the sides of the fireplace
surround must be approved to a minimum temperature
of 225 ºF continuous exposure. Consult the material's
manufacturer to ensure product compliance.
= No House Wraps / Tapes in Shaded Area*
TOP OF SURROUND
6 IN.
SIDE OF SURROUND
*
All materials installed within 6 inches of the top and 1 inch
on the sides of the fireplace must be approved to a minimum
temperature of 225 °F continuous exposure.
Figure 5.5. Exterior View without Non-combustible Sheathing Shown
WALL STUD
FIREPLACE
HEADER
HOUSEWRAP
INSULATION
HEADER
FLASHING
INSULATED
FRAMING
STANDOFF
Figure 5.6
Outdoor Lifestyles by Hearth & Home Technologies • TWILIGHT-IFT Installation Manual • 2668-970 Rev. C • 3/21
METAL FLASHING
10-7/8 IN.
1 IN.
SHEATHING,
COMBUSTIBLE
**
HOUSEWRAP
(BUILDING
PAPER) OVERLAP
FLASHING 1 in.
*
NON-COMBUSTIBLE
SHEATHING
10-7/8 in.
16-5/16 in.
TOP OF
APPLIANCE
SURROUND
TOP HOOD
APPLIANCE
HOOD
* NOTE: All finishing materials on top of exterior sheathing
must be non-combustible for a minimum of 10-7/8 inches
above and 2-3/4 inches on both sides of the exterior face of
the appliance. This non-combustible finishing material can
be up to a maximum of 6 inches thick (6 inches maximum
horizontal overhang) to allow for brick and stone alcoves
(see Figure 5.5).
** NOTE: Combustible house wrap or building paper MUST
NOT extend over the outside of non-combustible sheath-
ing, and MAY extend over the flashing behind non-com-
bustible sheathing a maximum of 1 inch. Use high temp
silicone or sealant recommended by the manufacturer of
the housewrap to seal between combustible sheathing
house wrap and non-combustible sheathing. The sealant
material used within 6 inches of the top and 1 inch on the
sides of the fireplace surround must be approved to a
minimum temperature of 225 ºF continuous exposure.
Once the appliance is in place use enough high tempera-
ture silicone sealant or manufacturer specified sealant
(approved to a minimum of 225 ºF) to make a water tight
seal between outdoor surround and exterior sheathing.
Face the perimeter of the appliance with non-combustible
sheathing over shroud flanges and flashing. See Figure
5.7 for non-combustible zone.
= 1 INCH HOUSEWRAP OVERLAP
= SHEATHING
= NON-COMBUSTIBLE ZONE
SHEATHING
NON-COMBUSTIBLE ZONE
2-3/4 in.
Figure 5.7 Exterior Installation Prior to Finishing
WARNING
Risk of Fire
• Non-combustible clearances must be main-
tained.
• Sheetrock, wood or other combustibles must
NOT be used as sheathing or facing in the non-
combustible zone.
• See Sections 3 and 8 for proper clearances.
• See Section 1 for combustible /non-combusti-
ble definitions.
10-7/8 in.
FLASHING
2-3/4 in.
17