Important Facts About Roof Drainage Systems

It is important for every Australian families to know the requirements for having a Roof Drainage System. Renovations and/or newly built houses must consider the compliance of the Building Code of Australia (BCA). BCA holds the assessment for residential roof plumbing installation. This also includes development approval, environmental planning and assessment and guttering.

Every licensed plumbers, builders and roof plumbing installation experts are fully aware of all the factors to consider with the requirements for the installation of roof drainage systems, that is of Australian Standards and follows the options available in the Building Code of Australia.

These are the system factors to consider when planning and creating a Roof Drainage:

  • Catchment Area

– It is the rainfall’s first point of contact or the roof surface itself. There are also important matters to prepare in having your catchment area and these are…

  1. Roof Material – You can choose from Wood, Metal, Concrete or Asphalt. Metal roof is ideal since it sheds off more contaminants than those other options (Good for Rainwater Harvesting).
  1. Slope – It is the measuring factor on how quickly the water will run through the roof when it rains. The steeper it is, the faster it sheds off contaminants. But you must consider the capacity of the roof drain that is under. So it’s better to have it not too steep and not too flat.
  1. Catchment Area Size – This will determine the measurement of how much rainwater will go down to your roof drain pipe and will help you decide the capacity of the roof pipe drain. This will be dependent to the design and the size of your house.
  • Rainfall Intensity

– Checking the ratio of the amount of rainfall during a period of time. To know the normal rainfall intensity in your area will help you determine how you will design your Roof Drain System. Measurement used is normally (mm/h) mm per hour.

  • Overflow Measures

– Put it into consideration that it will normally happen and the gutter overflows. But if you don’t experience much heavy rains in your area and if your roof drain water doesn’t flow back into the building, then there is no need for in-depth measures.

There are a lot of ways and ideas of installing roof drainage systems depending on which standards you live up to follow. But it’s best to check the important factors to consider when planning to have one. Not just for creating a well planned goal but also a consideration of the thought that it will help prolong the life of your roof material and the drain system as well.

A roof drain’s fundamental role is very important to gage a building’s drainage systems and watertightness. The accuracy of the design for the whole structure should be spot on to avoid leakage that may or will damage some parts of the building temporarily or permanently. The system design should endure extreme conditions such as strong winds and overflows due to heavy rains.

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