Mid-States Asphalt manufactures a full line of woodfiber and perlite tapered insulation panels, cant strip and tapered edge strip. Mid-States tapered insulation is used in a wide variety of built-up roofing (BUR) and single ply roofing applications to help create positive drainage and prevent water from ponding. While 1/2”, 1/4” & 1/8” slopes are standard, special inclines are also available.Other sizes available include 1/16", 3/16" and 3/8". Mid-States tapered insulation is available for most warranted jobs.