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Modified Bitumen Roofing in Minneapolis, MN

What is Modified Bitumen?


Modified bitumen roofing is a type of low-slope or flat roofing system that combines the durability of asphalt with added flexibility and strength. It is commonly used in commercial and residential applications and is known for its excellent waterproofing properties.

Modified bitumen roofing is made from asphalt that has been modified with rubber or plastic polymers. These modifiers improve the roofing system’s elasticity, weather resistance, and overall durability. The modified bitumen is typically reinforced with fiberglass or polyester to add strength and stability.

Installation Process


The installation process of modified bitumen roofing involves rolling out the modified bitumen sheets on the roof surface. These sheets are either self-adhesive or require the application of hot asphalt or a torch to bond them to the roof substrate. The seams between the sheets are then heat-welded or sealed with adhesives to create a continuous, watertight membrane.

Advantages of Modified Bitumen Roofing


Modified bitumen roofing systems are known for their durability and longevity. The combination of asphalt and modifiers provides excellent resistance against weather elements, including UV rays, hail, and wind. They also have excellent flexibility, allowing them to expand and contact with temperature changes without cracking or compromising their integrity. 


Modified bitumen roofing provides effective waterproofing due to its seamless membrane and durable composition. It minimizes the risk of leaks and water damage, making it suitable for flat or low-slope roofs. Maintenance requirements for modified bitumen roofs are low. Routine inspections and minor repairs can help prolong the roof’s lifespan and ensure its performance.

Disadvantages of Modified Bitumen Roofing   


Installing modified bitumen roofing involves heating and bonding the sheets, which can be time-consuming and labor-intensive. Improper installation can lead to performance issues and premature failures. Modified bitumen roofing can be more expensive compared to other roofing systems, primarily due to the cost of materials and the specialized installation process. However, its durability and long lifespan can offset the initial investment over time.

Your Trusted Modified Bitumen Roofing Contractors

It is our goal to exact excellence in all aspects of everything we do. When you choose Allweather Roof as your Modified Bitumen contractor, you can trust that you’re getting a commercial roof which will stand up to foot traffic and last for years to come. Request a Quote for more information.