Designed for use with low sloping roofs, modified bitumen is a durable, weather-resistant roofing system that is frequently used by commercial, industrial, municipal, and institutional structures all across the country. The manufacturing method behind the name reveals that standard roofing asphalt is modified during the distillation process, replacing plasticizers and reinforcing the material with fiberglass or polyester fibers to increase durability and strength. There are two primary types of modified bitumen, including SBS or styrene-butadiene-styrene, which is used to boost flexibility within the membrane and offer increased ability to expand and contract over time. The second type is APP or atactic polypropylene, which helps the material to last longer by increasing the aging ability. SBS is used more frequently than APP, due to its flexible nature.


Benefits of Modified Bitumen

Property owners choose modified bitumen because it is affordable, durable, weather-resistant, and easy to repair. The low-cost maintenance of this material makes it incredibly attractive to budget-conscious organizations. Designed to outlast built-up roofing materials, which only last approximately 10-15 years, the average lifespan of modified bitumen is approximately 12-20 years or more, depending on the type that is chosen. The manufacturer and installation process used will greatly impact the results when this type of roofing material is selected. Factory-manufactured rolls help to assure quality control and consistency, which is necessary to take advantage of all the benefits of modified bitumen roofing. When installed properly by a reputable installer, this self-adhered system can provide protection similar to hot-asphalt applied systems at a fraction of the cost and without lengthy installation times.


Which Type is Best?

For commercial or industrial applications, it is best to seek counsel with an experienced roofing installation company that is knowledgeable about the requirements and needs of New England structures. A qualified roofing service will consider all of the variables, including the location, budget requirements, local building code regulations, and the condition and construction of the building itself. Modified bitumen is an excellent choice for roofing projects at schools, hospitals, offices, restaurants, hotels, and even multi-family structures, such as apartment or condominium complexes. To learn more about self-adhered roofing systems like modified bitumen and compare them to single-ply roofing alternatives, such as TPO or EPDM rubber roofing, contact A&M Sheet Metal & Roofing at 401-654-4128 and speak with one of our representatives.