China Gothic Style Fiberglass Reinforced Asphalt Shingle for Exposed Roofing, Find details about China Gothic Style Asphalt Shingles, Asphalt Shingle for Roofing from Gothic Style Fiberglass Reinforced Asphalt Shingle for Exposed Roofing
Underlayment: At standard slopes (4" per foot or greater) a shingle underlayment is needed. Yosaite
Waterproof breathable membrane (WBM110). On low slopes (2" to 4" per foot), PE waterproof membrane
(OM400) and Self-adhesive bitumen membrane (BMS030A) are recommended to use.