I just have my house re-roofed a week ago. Today I got up in the attic and saw the water heater flue pipe go through the roof like this (please see the picture below). It is almost touching the plywood on one side. Is this acceptable? I wonder if there is risk of fire hazard. The roofers must have shifted the vent collar down a lot. I don’t think it was like this before re-roofing.
Thanks for your opinion!!