Last modified on 18 June 2013, at 00:54

built-up roof



built-up roof (plural built-up roofs)

  1. (roofing) A continuous, semi-flexible roof membrane, consisting of multiple plies of saturated felts, coated felts, fabrics or mats assembled in place with alternate layers of bitumen, and surfaced with mineral aggregate, bituminous materials, a liquid-applied coating or a granule-surfaced cap sheet.