I have a warehouse with a flat roof. It has two drains and is supposed
to be inclined uniformly towards the drains. However, between the two
drains, a depressed area appeared and water pools there. From there,
it leaks down into the warehouse.

I am looking for cheap workarounds to stave off roof replacement. I am
wondering how hard is it to add a roof drain and connect it to
existing drains. Will that help?

i
who hates flat roofs