GUTTER SUPPORT SPACING
Gutter support spacing should normally NOT
EXCEED 900mm. Roofs with a pitch exceeding
35° and/or with SMOOTH SURFACES and/or
are subject to HEAVY SNOW LOADING,
support spacing should NOT EXCEED 600mm.
Various gutter angles incorporate fixing positions
which can be drilled for fixing. If the angle is fixed
to the fascia board, adjacent support brackets
should be no more than 900mm away. If the angle
is not fixed the brackets should be no more than
150mm away.
FITTING GUTTER
To snap the gutter section into the support fittings,
first push the rear edge of the gutter up hard
under the rear retaining clip of the fitting.
Then pull the front edge of the gutter out and
down with one hand, and the front edge of the
support fitting out and down with the other hand,
while pushing the front retaining clip over the front
edge of the gutter with the thumbs, until the gutter
snaps into place.
THERMAL MOVEMENT ALLOWANCE
When each length of gutter has been snapped
into position check that each end is not inserted
into the fitting beyond the ‘EXPANSION
ALLOWANCE’ line. This allows the gutter to move
with changes in temperature without distortion.
To ensure the joint remains intact, each gutter
fitting should be fixed to the fascia board or rafter
bracket wherever possible.
DOWNPIPE INSTALLATION
Downpipe installations must accommodate thermal
movement. This accommodation of approximately
10mm is made at the top of each 65mm and
68mm pipe section, but at the bottom of each
110mm and 160mm pipe section.
Spigot to socket joints in the 65mm and 68mm
systems require the insertion of a piece of pipe
of length equal to socket depth to produce a
secure fit.
TABLE 1
MINIMUM SOFFIT DEPTHS & OFFSET PIPE LENGTHS
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DOWNPIPE
|
MIN. SOFFIT DEPTH “D” (mm)
|
OFFSET PIPE LENGTH
“L” (mm)
|
|
65mm
68mm
110mm
160mm
|
|
38
38
122
155
|
INSTALLATION SEQUENCE
• Commence assembly of the downpipe by
fabricating an offset from the gutter outlet to
wall using a top and bottom offset bend
connected by a length of pipe cut to suit the
soffit depth of the building - Table 2.
The 110mm and 160mm offset bend sockets
must be solvent welded to the pipe.
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• Insert a piece of pipe, length at least equal to socket
depth, and otherwise to suit fascia depth, into the top offset
bend socket, and fit tightly underneath the running outlet. Secure
the bottom offset bend to the wall with a bracket so that the
entire assembly is a solid fit under the outlet.
• Fit the downpipe working from the top. When the pipe is
65mm or 68mm place the bottom end into a downpipe connector, and
secure the connector to the wall using a pipe and fitting bracket,
leaving a 10mm thermal movement allowance at the top. Secure 110mm
and 160mm pipe at the top using a pipe and fitting bracket under
the socket shoulder. The lower end of this pipe must be inserted
10mm less than the full socket depth when connecting the next
pipe or fitting
• Fit additional lengths of pipe or fittings using the same
principles to achieve thermal movement allowance at top or bottom
depending on downpipe size. Secure with a bracket at each fitting
or socket, and on the pipe as necessary to ensure support at centres
no greater than 2m.
DOWNPIPE INSTALLATION EXCEEDING
10m IN HEIGHT
• Galvanised metal brackets MUST be used to
support the installed weight of 110mm and
160mm systems of height greater than 10m.
