Commercial Built-Up Roofing in Southern California

Dunlap Roofing Company

Commercial Built-Up Roofing in Southern California / Dunlap Roofing Company

The commercial built-up roof system, or asphalt flat roofing, consists of multiple plies of roof felts laminated with bitumen (typically asphalt). The asphalt or coal tar is heated in a kettle or tanker and then applied by mop or mechanical spreader. Cold-applied adhesives typically are solvent-based asphalts that do not have to be heated in a kettle or tanker. The most common surface for built up roof systems consists of gravel with a heavy application of asphalt or cold tar. The number of plies in a cross section is the number of plies on a roof: the term “four plies” denotes a four ply roof membrane construction. Sometimes, a base sheet, used as the bottom most ply, is mechanically fastened. Built up roofs generally are considered to be fully adhered if applied directly to roof decks or insulation.

Dunlap Roofing Co. is your best option for maintenance and installing built-up commercial roofing systems in Southern California.

CSLB # 290883 B, C-33, C-39, ASB certification
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