Vermont Castings BR36 Homeowner's Installation And Operating Manual page 13

DO NOT put any sealant around the area where the outer
pipe slides through the firestop spacer. If you seal this
area, it may cause a fire hazard.
Canadian Requirements for
Insulation Shield
In Canada, an attic insulation shield is required to pre-
vent attic insulation from contacting the chimney section.
NOTe: If the attic insulation shield is used, the firestop is
not required in the attic installation. Framing dimensions
for the chimney hole should measure 14Z⁄₂" x 14Z⁄₂" (368 x
368 mm). An attic shield MUST be installed on top of attic
joists (above the floor level). (Fig. 19)
NOTe: In the U.S., it is a good idea, although not always
required, to install an attic insulation shield where blown-in
insulation is planned to be used in the attic.
Install the attic insulation shield with the flanges on its base
extending down into the framing hole. Nail each corner
of attic insulation shield to the framing members of the
ceiling hole using 8d nails. Attic shields are not required
at the roof.
Attic
Insulation
Shield
Ceiling
Fig. 19 Attic shield installlation (Canadian requirement).
Continue Installing Pipe to Complete Run
Continue attaching pipe sections to complete system
to next level always being careful that the pipe is firmly
snapped locked in place before proceeding to next pipe
section.
Chimney Supports
If chimney supports are required, they are installed the
same as elbows. Nail chimney support straps to adjacent
structural framing, as shown on Figure 9, Page 8. Bend
straps as necessary and make sure they are secure so
they will support the weight of the chimney. A chimney
7412944
Nails
(4 required)
Attic Joist
Base
Flanges
FP263
FP263
MBUF
5/9/96
BR/BC Series Woodburning Fireplaces
support is 2Z⁄₂" (64mm) long when installed. Consider this
dimension when determining how many straight chimney
sections are needed.
NOTe: Chimney supports are generally used in long runs
in a chase installation.
Additional Ceilings
If you encounter additional ceilings, repeat same steps
required for first ceiling installation. See firestop illustration
on Page 12, Figure 18.
Penetrating the Roof
Run pipe to roofline. Since chimney system must be
vented to the out-of-doors, you must use an approved
termination.
If a chase is used, refer to the installation manual provided
with the termination cap.
Locate Chimney Centerpoint On Roof
Use same procedure detailed in locating center point of
the flue system.
Drive a nail up through roof at the center point. This will
determine center point on outside of the roof.
Cut and Frame Roof Hole
Size of roof hole varies with the type of chimney termination
installed. Refer to installation instructions provided with the
chimney termination to find correct size of roof hole.
There must be a 1Z⁄₂" (38mm) air space between outermost
portion of chimney sections and any adjacent combustible
surfaces. (Combustible surfaces include burnable materi-
als such as: ceiling members, joists, flooring, combustible
insulation and roof structures.)
WARNINg: DO NOT PACK ReQUIReD AIR SPACeS
WITH INSULATION OR OTHeR MATeRIALS.
Mark an outline of the roof hole around the center of the
point nail. NOTe: Hole dimensions given in the chimney
top installation instructions are horizontal dimensions;
therefore, the hole size must be marked on the roof ac-
cordingly.
Cover the opening of the installed chimney so debris can-
not get into the system.
Cut and frame the hole. It is good practice to use framing
lumber that is the same size as the rafters. Install the frame
securely because the chimney top and flashing anchored
to the frame must be able to withstand heavy winds.
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