Metal roof underlayment

john J
1/20/2012
I am a homeowner and still learning the roofing terminology. I am thinking about installing the metal tile (Decra villa tile) DIRECTLY on the roof (on 1/2" plywood or osb) without batten (per the manufacture). A roofing store person told me that I should use GAF TigerPaw (feels like plastic to me) instead of a #30 felt. Later I realized that part of the tile will be sitting directly on the underlayment. Would the high temperate metal tile damage/burn the plastics-like TigerPaw over time? What's your suggestion for a proper underlayment for such metal tile? Thanks in advance for your feedback.
Todd Miller
Classic Products, Inc.
1/20/2012
The synthetic underlayments like Tiger Paw are being used extensively underneath metal roofing and they handle high temperatures well. Over time, they break down much less in high temps than do traditional felts.
Guest User
1/20/2012
Thanks Todd, that's very assuring. One more question along the line. If I use Tiger Paw, I was told that's all I need for the underlayment (to meet the local code). Do you think I should put down others around eaves and valleys? If so, what type of underlayment. The weather here (around San Francisco) is - hot in the summer, hardly any rains. Rains a lot during winter, no snow, temperature hardly goes down 30F. Wind can be 30+ MPH during rain (maybe a couple of times a year).
Todd Miller
Classic Products, Inc.
1/20/2012
You should be fine with the tiger paw alone as long as it meets code and I believe it does. One more thing though make sure that you do not need anything special as far as underlayment to meet fire code requirements in your area. You probably don't but check with the roofing manufacturer.
Info @windowsonwashington.net
An informed customer is our best customer.
1/20/2012
1. Definitely use and underlayment. 1-b. You don't need battens for the Villa Tile. It is a direct to deck application. Med tile is a batten system. 2. The synthetic underlayment are 100% fine at those temperatures and will hold up better over time compared to felt. I would go that route personally and that is one of the products that we use (i.e. synthetic underlayments).
Guest User
1/23/2012
Thanks a lot!
Info @windowsonwashington.net
An informed customer is our best customer.
1/24/2012
Good Luck. Post up some progress pictures. We love to see that.

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