Roof Drainage Systems

Best Professional Roofing> Services


Roof Drainage Systems

The roof drainage system is clearly one of the most under-rated components on the average flat roof. Next to roof flashings, they are also the most vulnerable. Leaks that develop at drain locations can be catastrophic for the roof system.

One of the cardinal rules of good roof design is to provide slope for rapid, dependable drainage. Low slope drain directed roof (roofs that drain direct to the drain) tend to last longer and have less maintenance than roof that allow water to stay for a long period of time. A roof that has bad drainage system has more water on its surface.

Retrofit drains are an option during a repair or re-roof. The primary advantage of using a retrofit roof drain is that it gives us control over the roof rather than waiting for a plumber to run new pipes. While repairing or reroofing we install the retrofit system and ensures it's watertight before we move on to another area of the roof.

A good retrofit drainage system should include a metal flange, strainer, clamping ring (if required), and outlet pipe. The clamping ring creates a compressive seal on single-ply membranes. The roofing material is brought in over the horizontal flange, and a series of studs receive the clamping ring and hardware. After the compressive seal is formed, if water backs up out of the drain, it won't be able to flow in under the roofing membrane

Call us at 760-594-7449 for a free estimate