Q&A – Tape and high temperatures

With high temperatures incoming this summer, this homeowner wanted to make sure their roof stayed strong.

This homeowner, Kim, came to our experts with the following question: 

We had a Tuff Rib Metal Roof installed a week ago. One panel was removed and replaced to ensure that the deck was in fact dry after it was installed following a torrential rainstorm. To patch the titanium UDL 30 underlay the roofer used blue duck tape. Can the adhesive on this tape withstand the high temperature for the life of the roof? Also, is it in keeping with the warranty with titanium UDL 30?

One of our experts, John Kenney from Cotney Consulting, had some thoughts for Kim: 

Kim, that's a very good question because not all tapes are created equal, especially under a metal roof where temperatures can become extreme.

Titanium UDL 30 is a synthetic underlayment, and when repairs are needed, the best practice is to use a tape or flashing product that is approved or recommended by the underlayment manufacturer. The concern isn't just whether the tape will stick today — it's whether it will maintain adhesion after years of thermal cycling, expansion, contraction and elevated temperatures beneath a metal roof.

"Blue Duck Tape" is a broad term and can refer to several different products. Some construction tapes are designed primarily as air-barrier or housewrap tapes and are not specifically rated for long-term exposure to the temperatures that can develop beneath metal roofing. Depending on the roof color and climate, temperatures beneath a metal panel can exceed 150°F and occasionally reach even higher levels.

Without knowing the exact tape product used, I can't say whether it meets Titanium's requirements or whether it would affect warranty coverage. My recommendation would be to:

1. Ask the contractor for the exact tape manufacturer and product name.
2. Contact Titanium's technical department and verify whether that specific tape is approved for repairs to UDL 30.
3. Request written confirmation if warranty compliance is a concern.

The good news is that the repair area sounds very small and was made after a panel was removed for inspection, which is the right thing to do if there was concern about trapped moisture. The question now is simply whether the repair material is compatible with the underlayment system.

I would not automatically assume the blue tape is a problem, but I also would not assume it is approved. Verify the exact tape product with the contractor and then confirm compatibility directly with Titanium's technical department. That's the only way to know for certain whether the repair meets their installation and warranty requirements.

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