Table of Contents
Advertisement
Ensure the thimble penetrates the roof opening.
The thimble must extend completely through
the ceiling or roof cavity to the outermost plane
of the roof. Note: Thimble extensions (F8-
TE26) are available from your distributor for
constructions in which the distance between
the outside of the roof and the inside of the
ceiling exceeds 13". The thimble provides for
zero clearances to combustibles and must be
used at the ceiling/roof in manufactured homes
with double wall chimney ( Figures 21 and 22 ).
Outer Pipe Of
Chimney
14" Min.
Thimble
F8-FSTAE-2
Pitched Roof
Note: Trim Thimble/
Extension To Desired Length
And Pitch At The Rood Line
14" Min.
Thimble
Extension
F8-TE26
Thimble
F8-FSTAE-2
Pitched Roof
Outer Pipe Of
14" Min.
Chimney
Thimble
F8-FSTAE-2
Bow Roof
Figure 21
WARNING: DO NOT ALLOW INSULATING
MATERIALS TO BE BLOWN INTO THE
SPACE INSIDE THE THIMBLE AND THE
CHIMNEY. TO DO SO COULD RESULT IN
A FIRE HAZARD.
Outer Pipe Of
Thimble Cathedral
Chimney
Ceiling
14" Min.
Use Adjustable Thimble
F8-FSTAE-2 For All
Ceiling Piches, From
Flat To 3/12 Pitch.
Figure 22
Step 4. Note: Chimney sections are con-
structed with a unique locking tab design,
which ensures an immediate, tight assembly
between sections. Plan your chimney require-
ments carefully before assembly as chimney is
difficult to disassemble after installation. If
disassembled, the tabs might become dam-
aged. Be certain tabs are properly formed to
ensure locking tabs engage properly.
The FTF8 chimney system is a two piece chim-
ney, which snap together from the fireplace up.
Start with the inner flue section with the lanced
end up, snap lock it in to the matching collar on
top of the fireplace. At all subsequent joints, the
upper flue section fits into the preceding flue
section. Each piece snaps together by means of
locking tabs (9 locking tabs per joint). Check
each piece by pulling up slightly from the top to
ensure proper engagement before installing
Outer Pipe Of
Chimney
the next section. If the flue has been installed
correctly, it will not separate when you test it.
Also, the inner flue joint where each section is
joined should be tight and flat without gaps
( Figure 23 ).
13"
Figure 23
Outer pipe section installs in just the opposite
way; the lanced end goes down and each new
section goes OVER the outside of the previous
section installed ( Figure 24 ).
Figure 24
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Note: Assemble one component of chimney at
a time (inner section first, then outer section
last) before proceeding with the next complete
section.
Continue to assemble the chimney up through
framed opening. Assemble just enough to
penetrate the roof flashing openings ( Figure
25 ). Maintain 2" minimum air space to insu-
lation and building materials and always check
each chimney joint (inner and outer) to en-
sure proper engagement. Check vertical align-
ment of chimney so that it projects from the
roof in true vertical position.
Figure 25
FireCraft chimney sections do not need to be
screwed together. Additional reinforcement is
not necessary except in certain offset condi-
tions (refer to page 13, Figure 36 ).
Step 5. The height of vertical chimney pipe
supported only by the fireplace must not ex-
ceed 30'. Chimney heights above 30' must be
supported by a Model FTF8-S4 stabilizer in-
stalled at 30' intervals.
Note: The Model FTF8-S4 adds 3" net effective
height to the total chimney system.
Install the Model FTF8-S4 stabilizer by fitting
inner section down into respective section of
proceeding flue pipe and locking outer stabi-
lizer section into place over the outer chim-
ney pipe. Position for proper clearance
through framed opening and nail straps se-
curely (under tension in "shear") into place
on framing. Use 8d nails. Attach successive
lengths of chimney pipe directly to stabilizer
using same techniques as described in Step
Locking
Tabs
4 ( see Figure 26 ).
(Lances)
9
Advertisement
Table of Contents
