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CHIMNEY HEIGHT
Flue outlet heights for standard roofing materials
Point where flue passes through weather
surface (Notes 1,2)
A
At or within 600mm of the ridge
Elsewhere on a roof (whether pitched
B
Below (on a pitched roof) or within
2300mm horizontally to an openable
C
rooflight, dormer window or other
opening
Within 2300mm of an adjoining or
D
adjacent building, whether or not
beyond the boundary
Notes
1. The weather surface is the building external surface, such as its roof,
tiles or external walls.
2. A flat roof has a pitch of less than 10°.
3. The clearances given for A or B, as appropriate, will also apply.
or flat)
(Note 3)
(Note 3)
Clearances to flue outlet
At least 600mm above the ridge
At least 2300mm horizontally
from the nearest point on the
weather surface and:
a) At least 1000mm above the
highest point of intersection
of the chimney and the
weather surface; or
b)
At least as high as the
ridge
At least 1000mm above the top
of the opening
At least 600mm above the
adjacent building
23
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