I know a few people that have used similar roof materials and have had problems with the materials melting as well. But keep in mind I live in Augusta GA and our summers get to 100+. If you lived in a place where the hottest it gets is like 80+ or so it would be fine. I mean even where I run my power cable in my trunk when it gets warm it made an impression in my OEM deading material. So trial and error may be your best bet.