The most common form of spouting put up by the home handyman or 'DIYer' is
PVC spouting. Usually Classic or Stormcloud profiles, both a product of Marley.
Most of the information in this page is taken from Marley installation brochures
TERMINOLOGY USED IN THIS PAGE
FLASHING: watertight material used to cover joints in a roof or redirect water flow.
FASCIA: Board or cover at end of eaves. Usually to which the spouting (gutter) is fixed.
For other terminology refer to diagram below
STEP 1. Installation tips and preparation.
If the fascia board requires repairing or repainting this work should be completed before the spouting is installed. The roof overhang beyond the fascia should not be less than 30 mm or greater than 50 mm to ensure correct roof water discharge into the spouting.
- If the roof overhang is less than 30 mm a flashing will be required to prevent water running down behind the spouting.
- If the roof overhang is more than 50 mm either pack out the fascia board or brackets using painted strips of tanalised timber or, if practicable, cut back the roof overhang.
Establish the low points of the installation. These will be determined by the location of existing downpipes or stormwater outlets and will become the expansion outlet fixing points.
Establish the high points of the installation. If possible, these should be located at a corner approximately half way between the low points. For gable end installations, the high points will be located at the ends most distant from the low point.
STEP 2. Fixing of brackets and outlets.
Space brackets between 500 - 600 mm. Bracket spacing should be reduced to 300 mm in very high wind zones or in snow-prone areas. Position the first bracket at the determined high point, as high as possible under the roof overhang, by nailing/screwing. Do not use gib clouts.
Use a stringline to position the other brackets to the low point allowing a fall of 5 mm for every 10 metres in the run.
Next fit expansion outlet.
- If positioning the stringline over the bracket base-plate, line up expansion outlet back-plates with the top positioning lugs just touching the stringline. Position the back-plate centrally over the stormwater outlet or at the proposed downpipe position.
- If positioning the stringline under the bracket base-plate, line up the witness marks (making sure you use the correct witness marks for the chosen profile of spouting), located in the centre of the outlet back-plate, with the stringline.
Note: If an expansion outlet is not included in a run exceeding 10 metres, or 8 metres (including corners) if the spouting is to be painted, an expansion joiner must be fitted to accommodate thermal expansion/contraction.
STEP 3. Spouting installation.
Position the front return of spouting onto the bracket ends and, after ensuring each bracket is correctly engaged into the front return, roll spouting section evenly upwards towards the bracket until the rear top edge firmly locks into the bracket. Note: Never solvent weld the spouting into expansion outlets as the spouting must be allowed to move freely to accommodate movement.
STEP 4. Fitting corners.
Fit external and internal corners, solvent welding them to the spouting.
- Special spouting corners. Special spouting corners (other than standard 90°) can be fabricated at the Marley factory. It is necessary to provide a cardboard template to your plumbing or building merchant showing the exact angle required noting whether it is internal or external and stating either Classic/Stormcloud. If a raked angle is required, a further template of the rake is required stating whether the rake goes up or down.
STEP 5. Fitting expansion outlets.
To calculate the correct length of spouting required to fit into the expansion outlet, measure from the last installed length to the witness marks on the expansion outlet backing plate.
To fit the expansion outlet to the backing plate, once the brackets have been fitted and the spouting installed, slide the expansion outlet on to one of the spouting ends until it can be slid back in the opposite direction to accommodate both cut sections. Place the top rear section of the expansion outlet under the retaining clips on the backing plate and push the bottom of the expansion outlet into the backing plate until it locks into place with a click.
STEP 6. Fitting joiners and corners.
Fit spouting joiners, expansion joiners and corners.
Only Marley MCS Welding Solvent Cement should be used to join accessories to spouting. Surfaces must be clean and dry before application. The solvent should be applied to both surfaces and once the joint has been completed unnecessary movement should be avoided for a minimum of ten minutes. Once fixed in position, check the inside welded surfaces to ensure that a complete seal has been achieved and add extra solvent if required. Any surplus solvent on exterior surfaces should be removed immediately with a clean, lint-free cloth.
Painting
After installation, Marley spouting can be painted to any desired colour remembering that dark colours will require extra allowance for expansion/contraction.
To prepare the surface, wipe down with a bath cleaner and thoroughly wash. Once dry, apply two coats of acrylic paint ensuring the first coat is dry prior to applying the second coat.
Maintenance
To ensure your new Marley spouting maintains its good looks for years and years, an annual cleaning, using warm soapy water and a car cleaning brush, is all that is required. Simply rinse off with clean water.
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