Flat roof drainage solutions

Flat roofs are prone to water damage, because of the low pitch that allows water to pool. Gravel can be washed away, nails popped, railheads exposed. These things can cause serious leaks and roof damage.

This is a severe problem, as leaks can cause electric hazards.

Scupper drainage

If you want to reduce the water pooling, then you can install these scupper drains in the low edge areas. They are galvanized and they work by guiding the water from the edge of the roof down the water downspouts.

Internal drainage

This drain can also be tied to the existing home draining system. You will need to install them where water pooling commonly occurs. The inserts are made from aluminum and copper. Then the drains are attached to plumbing systems to guide the water outside the building.

Eavestrough drains

If you have an older industrial or commercial flat roof, then this drainage system is the best for you. They are not quite as popular as in the old days. The system is made of ditches created in the roof of the lower insulated areas. These ditches will guide the water off the roof.


If you already have a drainage system mounted on your roof, then maybe you want to install a system that will help the existing one. These drainage helpers work by recessing insulation in installed drains to allow a faster flow.

True sloped insulation solution

This is a drainage system that is usually used with new roofs, because it’s built underneath the flat roof. Boards of ISO, EPS or wood fiber are pre-cut by the manufacturer to your roof’s exact size. Also a slope pattern is created based on the size of your roof.

Step sloped insulation solution

Instead of cutting a custom-made roof board, this solution involves installing several layers of flat board insulation under the roof membrane. The boards are installed in steps, with the thinnest in the drain areas.


Plant carriers are actually a netting of biodegradable fibers or plastic, where seeds and seedlings are planted. These seeds will suck moisture from the roof and root in the nets.

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