We have a flat roof (no slope!) over our sunroom, carport and garage and recently we've developed leaks in the sunroom and garage. There are two standing water spots about 10 feet wide each over the leak areas. The standing water is 1-3 inches deep and lasts for days. We've had estimates from over 6 roofers and they all seem to be pulling answers out of a hat. All the roofers want to take off the the old covering and cover the decking with EPDM or TPO (i guess this is a good thing). They have all told me that EPDM and TPO are built for standing water "have you ever seen a commercial roof without standing water" (hmmmm, not too sure about this). Only one roofer added in his estimate to build up the low areas. Not a single roofer has suggested adding a slope with tapered insulation or other. I'm worried about future leaks and the weight of the standing water and also cosmetic. 1) What is the best way to fix this problem and what are the best materials to use? All of the estimates are around $5000 for 1000sqft and money is also a concern so we are thinking about doing the work ourselfs. 2) Has anyone had experience with DIY flat roofing repair? How did it go? Any advice? Last question....3) I've never dealt with contractors before so I assumed that if I told them what the problem was and after they inspected the roof that they would give me the best solution for the problem. Is this correct or do I have to specifiy to build up the low areas or to add tapered insulation?
Any information or advice would be MUCH appreciated!