Built-Up Roofing

A built-up roofing system, commonly referred to by the acronym “BUR” is a popular choice for flat or low-slope roofing systems, and has been widely used for over 100 years. Commonly referred to as “tar and gravel” roofs, these roofing systems are generally composed of layers of asphalt and base material which helps provide reinforcement and additional weatherproofing. These layers are alternated until a finished membrane is secured to the roof decking, providing a seal against the Built-Up Roofing in Billings, MTelements. Often, the bottom layer is secured to the roof decking with mechanical fasteners or adhesives. If you have a built up roof in Billings, MT that needs to be repaired or replaced, call Donahue Roofing today!

We can also install a new built-up roofing system on your recent construction. We offer FREE estimates, and will be happy to discuss all the available options for your specific building and budget. (406) 248-5428


The reinforcing fabric is, like the base material in asphalt shingles or a modified bitumen roof, typically composed of either organic fibers such as wood-based cellulose, fiberglass, or polyester. The bituminous material is derived from asphalt, coal tar, or a cold-applied adhesive substance. If asphalt or coal tar is to be used, it will first be heated and then mopped onto the base mat or applied with a mechanical spreader.

The surface material for a built-up roof is generally gravel, small granules of various minerals, slag, fiberglass, cap sheets made with mineral surfacing, or a coating of hot asphalt, aluminum, or elastomeric rubber compounds. These roofing systems can be heavy, and will require a certain amount of bracing in order to support the additional weight. Because of this, built-up roofs are not ideal on older buildings.

If you  have a built up roof in Billings, MT that needs to be repaired, we are here to help! The expert roofing contractors at Donahue Roofing can install a new built-up roof, and we are experienced in working with a number of alternative flat roofing systems as well. We are happy to offer FREE estimates on all our work, so please stop by or call us today! (406) 248-5428