SQUARE LINE GUTTER | Ram Plastics Supplies | Independent Plastics Builders Merchants



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Freeflow® rainwater systems, of square, half round, ogee or deep design, may be installed using the steps
outlined below. It is important that you refer to the design guidelines outlined at the end of this installation guide prior to beginning your installation project. The design guidelines, exploded view drawings
and product lists in this brochure will assist you in selecting the correct type and quantity of products
It is important to ensure gutters are fitted as high as possible to the roof edge and the roof edge should
not project beyond the centre of the gutter cross section. Gutters can be fitted either level or with a slight
fall. Laying the gutter with a fall will increase the flow capacity and increase the area of the roof that can be
drained. Silting will also be reduced with a gutter installed with a slight fall.
Fix the gutter outlet to the fascia with 6mm x 25mm (minimum) roundhead screws* vertically above the gully from which the rainwater will be conveyed to the drainage system. Use a string-line to ensure a straight
gutter, whether level or laid to a fall. Double check the desired fall is achieved, adjust as necessary. Mark
out the position of every support point along this line.
Fix fascia brackets to the fascia along the line created above with 6mm x 25mm (minimum) roundhead
screws* at maximum intervals of 1m. A fascia bracket should be fitted within 150mm of all stopends and
The fitting of a union bracket is required at each junction of two gutter sections. Fit a stopend to complete
the run. Union brackets should be fixed to the fascia with 6mm x 25mm (minimum) roundhead screws*.
Unions should never be allowed to ‘float’ without fixing.
Starting at the gutter outlet insert the back edge of the gutter under the retaining lip of the fascia brackets. Then press down on the gutter to snap the front of the gutter in place. Fit additional gutter lengths
and gutter lengths cut to size as required. When measuring gutters to be fitted, ensure that the gutter will
extend to the marks on the fittings. Fittings are marked to indicate the position to which the gutter should
be inserted to allow for thermal expansion.
All rainwater gutters and pipes must be squarely cut and all burrs removed. It is recommended that a fine
toothed saw be used. Care must be taken when cutting gutters and pipes in cold or damp conditions.
NOTE: In areas subject to high winds, extra securing of brackets may be required. Any extra screws deemed
advisable should only be secured through holes drilled with the necessary clearance.
Fixing of the downpipe starts at the gutter outlet. An offset is generally required to join the gutter outlet or
downpipe from the outlet to the downpipe on the wall. Offsets can be constructed from the range of Freeflow bends depending upon the roof overhang. All offsets should be supported directly beneath the lower
offset bend by a pipe clip. Remember to allow for thermal expansion as described below.
Insert a length of square or round downpipe as preferred into the bottom of the offset bend and fix a pipe
clip to the wall with 6mm x 25mm (minimum) roundhead screws*. Ensure that a gap of 10mm is left at the
top of the downpipe for thermal expansion. Fix additional pipe clips as required at maximum intervals of
2m. If the downpipe is subject to impact, extra clips should be considered. Two different pipe clip fittings
are available, a flush fitting and where a gap is preferable between wall and pipe, a stand off clip.
Additional lengths of downpipe may be required to reach the ground depending on the height of the building. In this case, fix a socket to the wall with a pipe clip and 6mm x 25mm (minimum) roundhead screws* at
the bottom of the existing fitted downpipe and fix another length of downpipe to the wall as outlined above.
Ensure that a gap of 10mm is left at the top of additional downpipes for thermal expansion.
When all downpipes have been fixed in place, connection to the drainage system can be achieved either by
terminating the downpipe with a rainwater shoe for disposal either into a drain or hopper or directly into the
underground drainage pipe using a rainwater pipe adaptor. The shoe or adaptor will take the rainwater from
the downpipe to the drain thus reducing the possibility of surface water accumulating on the ground.

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