PETEX 15 is the superior alternative to standard 15# conventional roofing felt for your DIY roof project. PETEX 15 is a contractor grade synthetic roof underlayment with a great price and ease of quick installation for your DIY experience. PETEX 15 roofing underlayment provides your DIY project a longer term solution than standard 15# felt PETEX 15 synthetic roofing underlayment is a great cost-efficient synthetic roofing underlayment for your DIY asphalt shingle roofing projects. PETEX 15 roofing underlayment is proudly made in the USA.