Flat roof drains – see the advantages and disadvantages of inner drains. By adding a scupper drain as a backup drain ensures that the roof will never flood.
It is very important to pay attention to where a roof drain is placed and how to prevent a roof from flooding in case a drain clogs.
Debris on a flooded roof causes a drain filter or strainer to clog very easily. To improve a roof drain it is important to have a metal strainer that can allow small debris through and prevent only bigger materials from flowing through. If the slots or holes on a drain strainer are too small, it will clog up very fast and make the drain inefficient.