Made up of layers of asphalt and insulation, and reinforced with either polyester or fiberglass, modified bitumen roofs blend traditional and modern roofing technologies to create a multi-tiered protection system – great for protecting commercial low-slope buildings from water, extreme temperatures and wind. Modified bitumen roof systems have a number of installation methods, including asphalts and cold adhesives.
Modified bitumen roofing systems consist of six primary elements:
- Modified bitumen membranes – the main element of the roofing system, made from an infusion of polyester or fiberglass.
- Insulation – provides increased ‘R’ value, UV resistance, and limits heat transfer.
- Base sheets – adds increased durability and strength.
- Adhesives – secures roofing material and provides water resistance.
- Surfacing – protects the roof from ultraviolet light.
- Flashing – seals gaps in roof perimeter and prevents leaks.
The Benefits of Modified Bitumen Roofing:
- High flame resistance means an increased change of attaining Class-A fire rating.
- Can be applied directly over existing roof in the case of a re-roof.
- Has a lifespan of over 30 years.
- Highly reflective material lowers energy costs.
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