metal roofing underlayment

Guest User
I am a sheet metal worker and hired a roofing contractor to remove my shingled roof, and old underlayment, install premium ice and water shield (Grace,GAF) and make standing seam roofing. I wanted to install myself to save labor cost. Everything was fine until I noticed they peppered my roof with cap nails and panels were wider than discussed. So I looked up ice and water shield they were installing; it was Owens Corning WeatherLock Mat. The online description said it was for shingle roofing and they made a WeatherLock for metal roofing. So I contacted salesperson he said that's what they use for all their metal roofs. We discussed exposure of panels he said 16"; and they made 18".. I contacted O.C. they said underlayment had to be changed to a high temp underlayment. Our contract was vague and I trusted him. What a idiot I was. I refused to install my metal on improper underlayment. They got O.C. to rewrite their warranty for my home. Now I'm totally confused . Do I need high temp ice and water or not? I'm tearing off and installing Grace HT. on whole deck.
Eric Novotny
An informed customer is the Best Customer!
Mark, What type of metal roof panel did you put down and in what color?
Todd Miller
Isaiah Industries, Inc.
I generally do not feel that a high temp product is essential in Indiana. However, if you wish, you could cover the current ice and watershield with a layer of synthetic underlayment to act as a slip sheet and protect from any issues if the ice and watershed should get "sticky" during high temperatures. The other option of course is to replace it.

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