A built-up roof system, commonly referred to as BUR, stands out as a popular choice for structures with low-slope or flat roofs, boasting over a century of use in the U.S. Mighty Fine Roofing specializes in BUR systems, known for their exceptional protective qualities due to their redundant nature. Comprising multiple layers of ply sheets and asphalt, capped with an additional layer of asphalt and granules, BUR systems provide robust resistance to weather and heavy-duty protection for buildings.
The components of a Built-Up Roof System (BUR) can be assembled in various ways. Typically, it starts with a base sheet installed over polyisocyanurate (polyiso) insulation or a cover board, often secured with mechanical fasteners. This base sheet acts as the initial layer of waterproofing protection and establishes a surface for subsequent sheets, adhered with hot asphalt.
Asphalt is applied over the base sheet for the installation of reinforcing felt, also known as a ply sheet. While traditional methods involve mopping hot asphalt onto the base sheet, advancements in manufacturing allow for alternative options such as cold-applied adhesive solutions. Saturated in asphalt or adhesive, the reinforcing felt forms a barrier, enhancing resistance to water intrusion. This process is repeated, adding more plies until the desired layering is achieved. The system is then finalized by capping it with a mineral-surfaced cap sheet or covering the top layer with asphalt and spreading gravel or slag.
The benefits of Built-Up Roofing (BUR) contribute to its enduring popularity, including its time-tested technology with over a century of proven history. The redundancy of BUR systems ensures multiple layers of protection, safeguarding the building even if the top layer is damaged. Depending on materials and installation, BUR systems may qualify for guarantees or warranties of up to 20 years. Additionally, reflective cap sheets are available to deflect the sun’s rays, aiding in reducing internal temperatures. With a range of options in asphaltic roofing systems, Mighty Fine Roofing guides clients in selecting the best solution, considering characteristics and preferences for optimal performance.
Asphalt Flat Roof Characteristics
The BUR roof system, or asphalt flat roofing, consists of multiple plies of roof felts laminated with bitumen. The bitumen typically used is asphalt (hence the name “asphalt flat roofing”), coal tar or cold-applied adhesive. 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 don’t have to be heated in a kettle or tanker. The typical 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.
Over the years, BUR has earned a great reputation with building owners, architects, engineers, roofing product manufacturers and roofing contractors. The asphalt flat roofing system has a good life expectancy, usually in the 15 to 25 year range
Mighty Fine Roofing Built Up Roof Expert
Choosing Mighty Fine Roofing for your built-up roof system installation is an assurance of unmatched expertise, reliability, and customer-centric service. With a rich history of successful installations in Marco Island Florida, Mighty Fine Roofing is a trusted authority in the roofing industry.
Our skilled professionals bring extensive experience to every project, ensuring meticulous attention to detail in the installation of built-up roof systems. We understand the nuances of the dynamic South Florida climate, and our expertise allows us to tailor solutions that stand up to the region’s challenges, providing enduring protection for your property.
Mighty Fine Roofing’s commitment to customer satisfaction goes beyond installation. We offer a comprehensive approach, including regular maintenance to maximize the lifespan of your built-up roof system. This dedication to ongoing support ensures that your investment continues to deliver optimal performance over the years.
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We primarily work in South Florida both east and west coast including Fort Myers, Naples, Marco Island, Miami, Fort Lauderdale, and West Palm beach