how to fix a leaky drain on a flat roof?
What's the best way to repair a leaky drain installed in the middle of the roof with pipes going through the house? I have a tar and gravel flat roof. It was repaired once with tar but now only after 1 year it's cracked and bubbled and leaking again. Please, indicate which materials are best, how to use them and approximate cost of the job. Also, what's the best type of INEXPENSIVE and easy to repair roofing if I choose to replace it? I'll appreciate a prompt reply. Thank you very much