A flat roof drain is one of the most important features of a flat roof design and they need to be taken care of.
Flat roof drain pipe.
3 inch hr.
Your building and location can help determine which drain will fit your roof needs.
Pipe cross section drainage area.
The sump receiver is a flat steel plate with a depressed center opening into which the roof drain body flange fits the sump receiver is supported by the lip of the opening in the deck.
Inner roof drains are used on flat roofs and include a low section or channel that collects water and feeds it into a concealed drain that leads to an underground drainage system.
Catchment area and rainfall intensity.
4 inch hr.
The most critical of these issues is the flat roof drainage systems.
The flat roof must have sufficient slope to allow water to flow towards the roof outlets.
In addition to easing the deck opening tolerance requirements the sump receiver distributes the weight of the drain over a larger surface of the deck.
Flat roof drainage capacity of a single drain pipe or leader.
If a flat roof drain is too small it can easily become blocked or simply not be in the right area for accurate draining of pooling water.
Along with the benefits of a flat roof come unique challenges.
Inner drains are resistant to freezing but can require careful maintenance to prevent problems.
Maximum horizontal projected roof area that can be drained in square feet.
The calculations below are meant for drainage from flat roofs where water are expected to spread over the entire flat roof during rain.
5 19 6 sq in.
6 inch hr.
Ss525 2006 code of practice for drainage of roofs.
5 inch hr.
A flat roof drain can also fail by becoming detached from the roof.
Water pooling in a yard can kill grass attract mosquitoes and create mud patches.
12 500 ft 2.
2 inch hr.
No matter the type of drain system for a flat roof as long as it functions correctly this will extend the life of the roof.
Pooling water has adverse effects on a flat roof.
Shop for roof drains at ferguson.
Rainfall rate inches per hour.
Ferguson is the 1 us plumbing supply company and a top distributor of hvac parts waterworks supplies and mro products.
The main benefit of inner drains is that the system is hidden from view.
Install a french drain one of the top yard drainage solutions to divert water away from problem areas.
When debris is allowed to collect around drains scuppers or in gutters then the roof is compromised.
