Modified Bitumen
Versatile multi-ply roofing system for low-slope applications.
About Modified Bitumen
Modified bitumen roofing combines the proven technology of built-up roofing with modern polymer-modified materials. Available in various application methods, modified bitumen provides excellent waterproofing and flexibility for low-slope roofs.
Key Benefits
Common Applications
Expected Lifespan
20-30 years
Ideal For
Low-slope commercial and residential roofs seeking proven, affordable performance

Modified Bitumen FAQ
Answers to frequently asked questions about modified bitumen for Chicagoland properties.
What is modified bitumen roofing?
Modified bitumen is an evolution of built-up roofing that uses polymer-modified asphalt membranes. It can be torch-applied, cold-applied, or self-adhered, providing excellent waterproofing for low-slope residential and commercial roofs.
Is modified bitumen good for Illinois flat roofs?
Yes, modified bitumen performs well in Illinois. The flexible membrane handles temperature swings without cracking, and multi-layer systems provide redundant waterproofing. It's a popular choice for low-slope roofs on additions, porches, and commercial buildings.
How long does modified bitumen last?
Modified bitumen typically lasts 20-30 years with proper installation and maintenance. Regular inspections and prompt repair of any punctures or seam issues help maximize lifespan in Chicagoland weather.
Ready to Get Started?
Contact us for a free assessment and quote for modified bitumen installation.