4. The main flue, cowl and funnel must be made of high grade stainless steel. The outer flue and the
flashing must be made of zinc-alum or galvanized. The main and outer flue sections must be fastened
together with stainless steel screws or rivets; use three rivets/screws at each join on both the main
and outer flue.
IMPORTANT:
The main flue pipe unions must be done in such a way that the upper section(s) fits
inside the lower one(s). The outer flue section(s) should be done inversely, with the lower section
inside the upper.
5. The cowl, funnel and the upper edge of the main flue must be screwed or riveted to one another
(provided on inside cover of box). The funnel must be free from the outer flue to allow for thermal
expansion.
This union must not be screwed/riveted.
6. You must thoroughly waterproof the flashing where it meets the roof sheeting and where the
outer flue goes through the flashing. Consult your hardware or specialist waterproofing company for
the most suitable products and techniques. If the outer flue extends more than one meter
above the roof,
or if the area is windy,
use tension
wires to fasten
the outer flue
to the roof.
DOWN DRAFT:
If wind collides with an obstacle, there will be turbulence that can
cause smoke to blow back down the flue (down draft). To correct this situation,
increase the length of the flue so that it projects over the turbulence area.
STAIRCASE:
If the fireplace is positioned near a staircase, the heat will flow towards
the upper levels and will not sufficiently heat the lower level. This can be corrected
by fixing a lintel above the staircase, thereby distributing hot air around the lower
level ceiling.
USEFUL HINTS
lintel
Summary of Contents for Sedgley
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