23
CHIMNEY HEIGHT
Flue outlet heights for standard roofing materials
Point where flue passes through weather
surface (Notes 1,2)
Clearances to flue outlet
A
At or within 600mm of the ridge
At least 600mm above the ridge
B
Elsewhere on a roof (whether pitched
or flat)
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
C
Below (on a pitched roof) or within
2300mm horizontally to an openable
rooflight, dormer window or other
opening (Note 3)
At least 1000mm above the top
of the opening
D
Within 2300mm of an adjoining or
adjacent building, whether or not
beyond the boundary (Note 3)
At least 600mm above the
adjacent building
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.
