RhinoRoof synthetic roofing underlayments are a step above traditional felt underlayments providing more dependability and durability. This light weight underlayment is stronger than felt underlayments which allows for wind and weather resistance. It can be installed at low temperatures, will not become stiff and can be used in conjunction with Titanium PSU30 for extra protection against ice damming and other weather conditions. RhinoRoof underlayments are offered in two warranty options; U10 that is equipped with a 10-year warranty or U20 which is equipped with a 20-year warranty.