Built-up roofing (BUR) is the most common roofing material used in flat roof surfaces or low-slope roof styles. Made up of layers of material that are laminated together, it is primarily composed of four components: a base sheet, felt, bitumen and a surfacing component like gravel or asphalt on top.
Kirtley Sons & Roofing, one of the leading commercial roofing contractors in the area, discuss everything you need to know about BURs, from types to advantages.
“Hot” and “Cold” BURs
BURs have two types: “hot” and “cold.” These terms refer to the bitumen used in the roofing process. It is deemed hot when the bitumen gets heated, turning it into a liquid during installation. BUR without the component of heat is considered a cold one.
Between the two, the latter offers better performance. Plus, it doesn’t give off toxic fumes during application. Even so, modern BUR products used in commercial roof installation add rigid insulation layers to improve the structure’s energy efficiency.
Advantages of BUR
Depending on the climate and the materials used to construct the roof, BUR is expected to last between 15 to 40 years. It works better in warmer climates than in cold areas.
With an aggregate top layer, a BUR system has outstanding resistance against fires and ultraviolet (UV) radiation. It also provides excellent waterproofing and doesn’t require as much maintenance as any other roof.
Kirtley & Sons Roofing is the name to call for your commercial roof maintenance and installation needs. Trust the one with nearly 60 years of experience, certifications from top manufacturers and quality workmanship.
Call (281) 371-6776 to learn more. You may also fill out our contact form to request a free estimate. We serve residents of Tomball, TX, and surrounding areas.