Hi, I have a rental duplex with a low slope tar and gravel roof. I have had three quotes with three different materials. The three quotes had different square footages but were within a 100 feet of each other. Approx 2900 - 3000 square feet. No taxes included and of course, any unforseen work would be extra. 1) Replace tar and gravel with tar and gravel. Approx $22,000. 2) Spray 2 inches of foam and coat with an ultraviolet coating. Needs recoating every 5 years. Adds r14 insullation. Approx $18000 3) Thermoplastic membrane with approx 235 linear feet of new metal edging. Approx $23,500 I'm in Canada so prices are higher but I just think these quotes are way too much. Not that I have much choice though. I'm leaning towards the spray foam but the membrane guy told me that even if I don't buy from him, dont' use the spray foam as they replace roofs done with it all the time. Any opinions on cost or best solution?

I recently bought a house on foreclosure that had a new roof put on prior to me buying it. They didn't put any step flashing down where the roof butts up to an outside wall. There have been a few leaks in that area and the joint between the asphalt singles and siding has been caulked. I was to take care of this before winter, but could use a little advise. What I'd like to do is cut about an inch off the siding above the shingles, so I can slip the flashing up under the siding. Does this sound like the way to go or is there a better way? Thanks, Bob