Roof Rainwater Drainage Systems

A siphonic roof drain utilizes siphoning as a drainage mechanism resulting in drainage that is faster than that on any other type of roof drain.

Roof rainwater drainage systems.

Choose siphonic drainage when you need to drain large rainwater volumes from flat roof tops quickly and efficiently. Siphonic rainwater drainage systems move more water through smaller pipes with less ground work than conventional gravity fed systems. Find out more rainwater drainage. We also offer vacuum roof drainage solutions for flat and low gradient roofs where usually it would not be possible to drain rainwater with a traditional roof drainage system.

With rainwater sucked into a downpipe at full flow water is evacuated quickly and efficiently especially during high precipitation. Typically used on large industrial and commercial roofs it is a cost effective substitute for traditional systems. Thanks to a dedicated flat roof drainage system you ll be able to remove this risk and ensure all rainwater is forced away from your property and into your drains. So how much roof slope is required to accommodate rainwater drainage.

Siphonic roof drain. If you allow rainwater to settle in place on any flat roof it can cause a range of problems to the building s structural integrity. Commonly used on flat commercial roofs siphonic drains allow for a minimal number of drains and all of the drains can be connected to a single leader. However areas that receive large amounts of rainfall should have a steeper slope like 1 inch for 1 foot of roof or more.

The cowled universal roof vent offers a versatile solution to roofspace ventilation across a wide range of roof coverings to pitches as low as 12 5 degrees. Flat roof drainage system. As rainwater intensities increase it is vital that your rainwater drainage system is correctly designed with the capacity to protect your building and contents. The figure of 6sqm comes from earlier guidance in british standards now superseded that stated that roofs having an area of 6sqm or less do not need gutters and downpipes.