New Deck Defense® underlayment’s durable synthetic construction provides an immediate line of defense—so strong it can protect your roof for up to 6 months* of UV exposure. It also acts as a secondary water-shedding barrier for your roof once shingles are installed. In addition, unlike standard felt underlayment, it comes with a 30-Year Limited Warranty.**

Your roof is a big investment, and it's important to make sure it’s done right from the beginning to ensure it’s protected from water damage in the attic, such as mold growth and rotting deckboards. One of the first steps to a high-performing roof is using underlayment in conjunction with shingles to help shield your home from moisture infiltration.

*Special application required for extended exposure. See installation instructions.

**See actual warranty for complete details, limitations and requirements.