In what aspect is modified bitumen generally more advantageous than roll roofing?

Modified bitumen is generally more advantageous than roll roofing in terms of greater flexibility. This flexibility is key to the longevity and performance of a roofing system. Modified bitumen is created by adding polymers to traditional asphalt, resulting in a material that can accommodate temperature fluctuations and structural movements without cracking or becoming brittle. This is particularly beneficial in climates with extreme temperature variations, where materials can expand and contract, leading to potential damage.

The flexibility of modified bitumen also allows it to withstand the stresses caused by foot traffic, equipment, or other loads on the roof surface, ensuring that it retains its integrity over time. This property is crucial for maintaining watertight seals and preventing leaks, which can lead to significant maintenance costs and damage to the structure below.

While roll roofing may have other benefits such as lower initial costs or availability, these factors do not contribute to the long-term performance and reliability that flexibility provides in the modified bitumen system. Thus, for homeowners and contractors looking for durability and resilience in their roofing choice, modified bitumen stands out as a superior option.