The rear dormer on my house was leaking. I hired another contractor, Hackensack Roofing, to repair it. They removed the old shingles and, because the roof was nearly flat, replaced them with roll roofing. They did a good job, for only $1800,. However, the roof continued to leak, at a somewhat slower rate, in heavy rain. After they made several unsuccessful attempts to rix the problem, including applying more sealant to the juncture of roof and chimney, I gave up on them, and hired Alleva Construction. Michael Alleva, the owner, came to the house and said the sheetrock on part of the stairwell had to come down. His crew would then locate the leak and fix it. He gave me an estimate of $1880. I agreed. His crew chief, Freddy, came to the house. This was in December, the weather was cold and getting colder, but Freddy wanted to start immediately. I said no. The work was postponed to the spring. Freddy came and, after removing the agreed-upon section of sheetrock, said considerably more would have to be removed. He gave me an estimate of an additional $4,833. Freddy soon said he had found the leak., a gap left by Hackensack Roofing between the flashing and the chimney. He said he had filled the gap with sealant. New sheetrock was installed and the cracks between the plaster sheets were filled.. I paid the remainder due. That was March 31, 2011. I painted the stairwell. We didn't get a heavy rain for three weeks. Then it poured, and the leak resumed. I called Alleva Construction and asked to speak with Mr. Alleva. Instead, the call was routed to Freddy, who came with crew, who cut a square hole in the new ceiling sheetrock and, using a garden hose, identified the leak as coming from cracks in the chimney. Freddy gave me an estimate of $7,775 to finish the job. I protested that it was too high. Freddy said that on roof work, the customer is expected to pay more, considering the risk. I felt I had no alternative, and agreed. The crew sanded and wire-brushed the chimney bricks and covered them with what Fredddy said was hydraulic cement, topped with waterproof stucco.The crew also installed replacement sheetrock in the stairwell. I paid the bill. It is three weeks later. We had one pretty good rain in this period, and the roof didn't leak. So far, so good. My complaints here are, first, the enormous size of the total bills, particulatly the third one. All told, the crews worked five or six days. Second, the leak was not properly identified until the second attempt. Seems incompetent. If it turns out, as the year and rains continue, that this repair was successful, I would rate the quality of the work done as adequate, although the quality of the diagnosis was poor. However this turns out, I want no further contact with Freddy.