Switch to Synthetic | Roofing | Owens Corning Roofing
30 ASTM D 226 TYPE II
Heavy Duty Asphalt Roofing Felt (30#) – Gardner Coatings
Durable Synthetic Underlayment Roofing Roofing Paper Stronger Than Felt Ice and Water Shield High Temp - China Roofing Underlayment, Building Material | Made-in-China.com
G 30 Felt - G.A.P. Roofing, Inc.
Standard Duty Asphalt Roofing Felt (30#) – Gardner Coatings