I've know since I bought the building that the roof needed to be completely replaced, since much of it was rippled and many of the joints with the parapet walls were tearing. I made the mistake of hiring some fly by night contractors to put a layer of paint-able rubber membrane on over 5 years ago, and I thought that would hold it for awhile, but the membrane already had started coming off in the same year. At that same time, I did get some estimates for a 'modified bitumen roof' for about $10K. Once of the estimators took a sample of my existing roof, and said there were 7 layers of roof, and what looked to be the original gravel roof!
So, obviously, this roof needed to be completely torn off.
I contacted a number roofing contractors, and decided on Cuevas Construction after receiving 6 different quotes. Mr. Cuevas seemed the most knowledgeable and experienced for the best price.
|The used axes to chop up the old roof, pile into large bags, and had a crane from the street move the bags into the dumpster.|
|A number of floor boards were rotted out from roof leaks|
|The worst damage was at the end of roof near the gutter. I think water was pooling up here where the grade was not steep enough.|
I found this a good page to describe TPO roofing vs. the traditional modified bitumen.