Techniques for finding leaks in a flat roof?

Question

there is a leak in my roof but i cant seem to find the source. i've tared up alot of my roof attempting to find the leak but i havent found it. can you help me.

Answer 1

It often enters one place and runs a  long distance. have you seen the way the roof is built.  Lots of layers of a weird "paper" that feels like felt.  With tar in between.  

At some point you have to have the old tar and paper torn off. Until then ,  buy the "elastomeric" coatings that are sold at Home Depot.  And use a lot of it.  The edges of the roof are the main culprits.  And watch for "bubbles" in the existing tar.

Answer 2

I dont mean to ask a question but why would anybody think a flat rood is to shed off water.

Build a pitch roof, gable roof or hip roof on top and finally rid yourself of the headache.