• Suitable for most residential applications
• For low pitched roofs the J Line gutter is ideal as it features an extended sloping face to hide the end of the roofing
• Suitable for some commercial applications — larger gutters such as the 300mm Box Gutter combined with Rainwater Heads can provide solutions
• All Roofing Industries Rainwater products are compatible for the collection of drinking water

It is imperative that the appropriate rainwater system, comprising, gutters, spouting, fascia, brackets and downpipes are correctly specified and then installed accordingly to ensure rapid shedding of water from the roof via downpipes to the groundwater system. Failure to implement an efficient rainwater system can result in water ingress and significant water damage to property. Roof drainage performance design must take the following factors into account:

• Roof pitch
• Rainfall intensity
• Catchment area
• Cross sectional area of the rainwater carrying system including downpipes
• Rainhead design
• Efficiency of flow rate and water discharge via the Downpipe(s)
• Overflows
• Roofing profile capacity
• Roof penetrations which may obstruct water flow

For further information in relation to all roof drainage charts and calculations refer to Roofing Industries.

Where snow may collect on the roof and the rainwater system, it is recommended Roofing Industries staff are consulted for design and appropriate installation instructions including the possibility of using snow straps.

Regular maintenance will extend the life of rainwater systems, and it is especially important to keep all surfaces free from dirt, leaves and debris accumulation, paying particular attention to the requirement of frequent freshwater washing of the undersides of gutters and spouting which may not receive regular rain washing or alternatively are installed in a corrosive environment.