DuraVent DuraTech 5-8 - Manual (Page 11)

ROOFING
FASTENERS
ADJUSTABLE
FLASHING
11
9. Attach Flashing: In new construction,
assemble the Chimney Sections to a point
above the roof, then slip the Flashing over
the chimney. On an existing roof, center
and install the Flashing before extending the
chimney above the roof. Allow space to permit
sliding the next Chimney Section up through
the Flashing. Always insure the chimney
remains vertical (use a level), and that at least
a 2” clearance to combustible materials is
maintained all around. Install the upper edge
of the Flashing under the roofing. Nail to the
roof along the upper edge and down each side
with 1” roofing nails. Do not nail the lower
edge of the Flashing (Fig.15). Seal top and
upper sides of flashing with roofing compound
or sealant. Be sure to follow local building
practices, as needed. Seal all nail heads with
a non-hardening waterproof sealant. On flat
or tarred and graveled roofs, nail and seal the
Figure 14
Figure 15
Figure 16
Flat Roof Flashing to the roof on all sides with
roofing compound. Do not put screws through
the Flashing into the Chimney Pipe.
10. Finish Top: Apply a high-temperature
(500ºF), non-hardening waterproof sealant
around the chimney at the point where the
Storm Collar will meet the chimney just
above the Flashing (Fig.15). Slide the Storm
Collar down over the chimney to the top of
the Flashing. Tighten and seal the Storm
Collar against the sealant. After installing
sufficient Chimney Sections to meet the height
requirement (Fig.1), attach the Chimney Cap
onto the top of the chimney by holding the
collar of the cap and twist locking it clockwise
onto the chimney. Do not hold upper portion
of the cap and twist, as this may damage the
cap. The Chimney Cap can be removed for
chimney cleaning as described in the Chimney
Maintenance section of the instructions. Use
an Extended Roof Bracket if the chimney
extends more than 5’ above the roof (Fig.18
in the Extended Roof Bracket section). If
you are located in heavy snow country, it is
recommended that a Snow Splitter be installed
(Fig.16). This will help protect the chimney by
routing snow around it.
SPLITTER
PUSH COLLAR DOWN
TO FLASHING AND
SEAL WITH NON-
HARDENING HIGH
TEMP SILICONE
11. Enclosures: Enclose chimneys where
they pass through occupied spaces, including
closets. Always maintain at least a 2”
clearance between the chimney and any
combustible materials. Interior enclosures