Non High Temp Underlayment Used ...: "I just found out that the underlayment used under my ..." - Michael Ross (11/29/2020) | I Have An Existing Metal Roof and Have A Question

I just found out that the underlayment used under my new metal roof is not the high temp version. My home is south facing, and I get 300 + days of intense sun a year. Looking for feedback – how big of deal is this? What will likely happen? Is the roofing company that I used going to be on the hook for redoing the entire roof, if so, can the metal be reused? Additional info- Roof: Decra shake XD Underlayment: Certainteed Ice and Water (on entire roof) Thanks in advance for any feedback on this.	Michael Ross 11/29/2020	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/25260/find/
Thanks for your question. One thing in your favor is that the back side of your metal roof style has only limited contact with the underlayment. Also, it sounds like they did not use the ice and watershield in all areas. That said, it sounds like you're in a very hot climate, but I do not know where. Ultimately I think this question needs to be brought to Certainteed and Decra as no one knows their products better than they do. My "gut" feeling is that things will be okay with your roof as-is but that is only an experienced gut feeling based upon limited information. I suggest contacting Decra and Certainteed. All Best.	Todd Miller Isaiah Industries, Inc. 11/29/2020	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/25261/find/
Hello Todd. Thanks so much for the reply. Here's some additional info for you: Battens were not used, so the decra shingles are screwed right on the the ice and water. The ice and water was used in all areas I called Certainteed and they said if their non high temp prouduct is used under a metal roof that it voids their warranty. What are the practical implications of having the ice and water shield warranyt being void?	Michael Ross 11/29/2020	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/25262/find/
To the best of my knowledge and experience, the risk is that the ice and watershield softens, melts, and even runs. While this is unusual and, I feel, unlikely in your case, it makes a mess, can even drip out at the eave, and diminishes the water resistance of the underlayment.	Todd Miller Isaiah Industries, Inc. 11/29/2020	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/25263/find/

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Non High Temp Underlayment Used Under Metal Roof