ROOFING UNDERLAYMENT

摘要

A roofing underlayment is provided. The roofing underlayment includes a carrier substrate including a felt mixture and a binder mixture; a volume of asphalt flux saturating the carrier substrate; wherein the felt mixture includes between 75% and 95% by weight corrugated paper/cardboard fibers and between 5% and 25% by weight fiberglass fibers; and wherein the binder mixture includes a mixture of alum and rosin having a mixture ratio by weight of alum to rosin in a range between one to one (1: 1) and four to one (4: 1). The volume of asphalt flux may result in a carrier saturation of between forty and fifty-five percent.