Osburn Horizon OB04010, Installation And Operation Manual

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54 HORIZON – Installation and Operation Manual
1. Cut and frame the holes in the ceiling, floor and roof where the chimney will pass. Use a plumb bob to
line up the center of the holes. Make sure that the size of the floor and ceiling holes are in accordance
with the chimney manufacturer’s instructions.
2. From below, install a firestop (B) supplied by the chimney manufacturer in each ceiling/floor separation
through which the chimney will pass. At the attic level, install a radiation shield from above (D) .
3. Follow the chimney’s manufacturers’ instructions and place the first chimney length on the fireplace.
For all chimneys, you must use an
anchor plate (A) supplied by the
chimney manufacturer before
installing the first chimney length.
Continue installing chimney lengths
making sure to lock each length in
place.
4. Cut and frame square holes in all
floors, ceilings, and roof that the
chimney will go through (C) to provide
a 2" (50 mm) minimum clearance
between the chimney and any
combustible materials. Do not fill this
space with insulation or any other
combustible material.
5. Every time the chimney passes
through a ceiling or a wall, install the
appropriate firestop (B) . When you
reach the desired height, install the
roof support (not shown). (Refer to
instructions included with the
support).
6. Then, put the roof flashing (E) in place
and seal the joint between the roof
and the flashing with roofing pitch.
For sloping roofs, place the flashing
under the upper shingles and on top
of the lower shingles. Nail the flashing
to the roof, using roofing nails.
7. Place the storm collar
(F)
over the flashing, and tighten it with the bolt supplied. Finally, seal the joint
between the storm collar and the chimney, using silicone caulking.
8. Install the chimney cap
(G)
.
9. When a ventilated roof flashing is installed, precautions are to be taken not to caulk or seal the
ventilating openings.