waterproofing leaking garage roof/deck
I have a garage that has a flat roof, which is our deck and it's leaking pretty bad. We had porcelain tiles on it. The deck was supposedly waterproofed using some thick black material and was melted using a blow torch. Then it was mudded to give it a slope and then tiled. Alas after one year the deck is leaking badly and the water is getting into the gararge.
We are going to get the tiles and the mud ripped and get it re done. We do have two square posts on the deck as well.
What is the best way get this to be waterproofed. I Just don't want to get it redone again and again. All advice is appriciated.
Thanks in advance