Three years ago I re-roofed a low pitch kitchen roof and used GAF Ice and Water shield as underlayment as added protection. I am now adding an addition to this home and the owners want me to re-roof the kitchen again to match the shingle color of the new room. What do I need to do with the ice and water shield? Can it be reused? If not, how do I remove it now that it is bonded to the plywood?
It's not coming off now, Tony. It's part of the plywood. In North Carolina, I would probably run a single course along the eaves, valleys and cheek walls, and use another roofing underlayment elsewhere--such as tar paper or Rooftopguard.
You just strip it and add a new layer of I&W on top of it. the old stuff is not coming off at all, and in a rare occasion may also bond to the shingles, if thats the case you will earn some blisters in ripping it. )