Umbra™ is a value roofing underlayment designed to replace #15 roofing felt and unrated oil saturated felts. It is 8x lighter and 12x stronger than organic oil saturated felts. 10-year limited warranty, 1-month direct UV resistance.
? Meets ASTM D4869 for Type I, II, III and IV ? Meets ASTM D226/D226-09 for Type II ? Meets CSA A123.3-05(10) for Type 1, 2 and 3