roof shingles over or under gutter hangers?
I'm in the process of having my roof reshingled. The roofer has removed the old shingles but left the gutter hangers, which were nailed through the top of the shingles, in place. The hangers are called Roof Rafter Tail Rod & Nut Gutter Hangers. It's the type that's designed to be nailed down through the shingles. Yesterday he began laying ice and water shield over the hangers. This has left a noticeable gap on either side of the hangers and I can easily see that the ice and water shield is not laying flat against the roof plywood on either side of the hangers. My concern is that it never will, and water will work it's way up the roof from ice dams that occur every winter. Am I right? Should I ask him to pull up the ice and water, removed the gutter hangers and install them over the shingles?