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Replacing Your Gutter & Down Pipes

FloPlast rainwater systems offer a wide choice of profile design, both traditional and modern, in a range of colours to suit all tastes and applications.

The FloPlast reputation for technical excellence, competitively priced and quality finished products have established the company as a leading supplier of PVC-U Plastic Building products.

FloPlast Rainwater Systems are suitable for all applications and types of building, including domestic, commercial and industrial.

FLOPLAST PVC-U RAINWATER INSTALLATION

Installation
1. Plan your installation using the component diagrams to assist you in selecting the correct type and quantity of products required. Fascia brackets should be spaced at a maximum of one metre apart on straight gutter runs. (800mm in the case of the Niagara system, 600mm in the case of the Xtraflo system). When using 80mm Round Downpipe with Hi-Cap and Niagara Systems, fascia brackets should be spaced at a maximum of 800mm intervals. In areas where there is the possibility of high levels of snowfall, fascia brackets should be spaced at a maximum of 400mm centres. For further information, view our snow loading statement. Angles and stop ends should have a fascia bracket within 150mm of the fitting. A supporting pipe clip should be used on shoes, branches and bends where necessary. Support downpipes below offset and at maximum intervals of 1.8 metres.


2. Where necessary remove the old gutter and replace old fascia board with FloPlast low maintenance PVC-UE co-extruded fascia board.


3. Establish the position of the running outlet, usually
over an existing drain, and fix securely to fascia board.


4. Fix a fascia bracket 100mm short of furthest point
from the outlet. Allow for a fall to the outlet (1:350 is recommended) using a string line.

 

 

7. Working from the running outlet insert the back edge of the gutter under the retaining lip of the wrap around clip. Using slight downward pressure on the gutter snap the front edge of the retaining clip over the front of the gutter. (Ensure that the marked expansion allowance is kept.)

8. Use a union bracket or angle to join to next gutter length in order to build up a gutter run. Use a stop end to complete the run.


9. Downpipe installation starts at the outlet. If an offset is required use two offset bends with or without a short piece of pipe, alternatively use an adjustable offset bend. Ensure a 6mm gap is left at the top of the downpipe for expansion. Pipe connectors if required should be secured to the wall with a pipe clip. At the base of the pipe, fit a shoe secured with a pipe clip or connect downpipe to underground drainage system using a 110mm x 68mm reducer (SP96/D96 or D97).


Capacity of Drainage.

To select the gutter size appropriate to your requirements, two factors must be taken into consideration.  Roof Area & Gutter Flow Capacity – For further reference refer to BS 12056-3:2000 “Roof Drainage Layout and Calculation”.The capacity of a drainage system should be large enough to carry the expected flow at any point in the system. The flow of ‘run-off’ depends upon the area to be drained, (the ‘effective roof area’), and the intensity of rainfall. It is accepted that 75mm an hour is the intensity of rainfall in the United Kingdom. For further information, see the FloPlast “Gutter calculator” at: www.floplast.co.uk


Cleaning and Maintenance.


Although PVCu rainwater systems are considered to be relatively maintenance-free it is important to clear gutter systems of fallen leaves and other debris at least once per year. More frequent inspections may be necessary in areas of high pollution and where there are trees in the vicinity.
Inspection of the gutter and brackets is also advisable
during and after periods of ice formation in the guttering system. In some cases lighter coloured  systems may require cleaning. Wash down with a solution of soapy warm water, in severe cases a non-abrasive kitchen cream cleaner should be used.

SNOW LOADING STATEMENT

Snow slippage is particularly evident where smooth
roofing materials such as slate have been installed.
For additional security FloPlast strongly recommend
the installation of Snow Guard (see page 5) which
facilitates the retention of snow, allowing slow melt,
rather than slippage. In areas where there is the
possibility of high levels of snowfall, fascia brackets
should be spaced at a maximum of 400mm centres.
Several factors can come into play with the
performance of rainwater systems, installation,
overhang and style of the roof system (tiles/slates),
pitch of roof, North or South facing, above or below
100 metres above sea leve

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