#15 perforated roofing felt

An asphalt roofing felt made of a specially formulated organic sheet, which has been fully saturated with waterproofing asphalt. This perforated with small holes to permit release of vapors caused by hot asphalt during mopping-in as a ply in built-up roofing system. This felt is pre-conditioned to lay flat and remain stable during and after installation. NO.15 perforated asphalt felt is designed to be used as a ply sheet in hot-asphalt B.U.R. roofing may also be used as a general-purposed construction felt or as a cover sheet curing fresh concrete where a controlled drying rate is required.