How to remove standing water on a flat roof by installing a channel and scupper. Inner drains get clogged with leaves and debris. These channels help get rid of leaves and debris off a flat roof during a storm.
This is the most effective drain system on flat roofs. very few roofing contractors take this approach, yet nothing comes close to it.
Ten reasons why to install a channel and scupper versus an inner drain or gutter on a flat roof:
1. Pooling water collects leaves and debris
2. Standing water on flat roofs cause deterioration of the rubber membrane
3. Ponding water on a flat roof is a breeding ground for mosquitos
4. Pooling water promotes the growth of moss and other plants
5. Regular drains get clogged and need constant maintenance
6. Channel drains have less chance of getting clogged
7. The added weight of standing water on a flat roof adds stress to the structure of the building
8. Water standing ao a flat roof will cause any ultraviolet protective coatings to peel off
9. No drain pipes to deal with
10. Less expensive to install and maintain
The disadvantage of a channel with a scupper is that the water drops to the ground. Some kind of protection should be placed where the water lands to prevent erosion of the soil.
A leader pipe can also be installed to remove the water from the roof in a more controlled manner. But, that defeats the object of being maintenance-free. Leaves and debris will clog the leader header.