Flat Roof Drain Strainers

Flat roof drain strainers are important if appropriately designed a strainer is supposed to keep larger objects from going down a drain while allowing smaller debris through with the water flow.

Flat roof drain strainers. If appropriately designed a strainer or leaf filter is supposed to keep larger objects from going down a drain while allowing smaller debris through with the water flow most strainers or domes that cover a drain on flat roofs are poorly designed because they block smaller debris and the strainer becomes clogged preventing any water flow. They are responsible for properly draining any and all accumulated precipitation. Flat roof drains and strainers are the most important components of any commercial flat roof. Flat roof drains scuppers gutters and drainage systems on flat roofs.

Flat roof drain strainers. To preserve the life of the roof however the debris that collects around them must be removed on a regular basis. Most strainers or domes that cover a drain on flat roofs are poorly designed because they block smaller debris and the strainer becomes clogged. With a proper strainer over this drain the roof will be maintenance free.

There are conditions on a roof that is not practical to lower a drain as illustrated in the videos above. If that s the case then an alternative solution is to fabricate a large strainer that will fit around the drain. They become brittle and break. This is what it looks like after attaching the membrane to the cast iron drain.

This video explains the principle of a drain basin. A plastic strainer for a flat roof drain is not a good idea.