Modified Bitumen Roofing
Multi-Layer Protection for Maximum Durability
Modified bitumen roofing combines the proven reliability of built-up roofing with modern polymer technology. Its multi-layer construction provides exceptional puncture resistance, waterproofing, and flexibility — ideal for commercial buildings with heavy rooftop foot traffic.
Why It Matters
PROVEN TECHNOLOGY, MODERN PERFORMANCE
Modified bitumen has been protecting commercial buildings for over 40 years. Its multi-layer construction creates a redundant waterproofing system — even if the surface layer is damaged, the underlying layers continue to protect your building.
- Multi-layer redundant waterproofing
- Superior puncture and tear resistance
- Handles heavy foot traffic from rooftop equipment access
- Flexible performance in temperature extremes
- Multiple installation methods — torch, cold-applied, self-adhered
- Granulated or smooth surface options
What Sets Us Apart
THE YOSEMITE DIFFERENCE
We install both APP (atactic polypropylene) and SBS (styrene-butadiene-styrene) modified bitumen systems — selecting the right polymer for your climate and application.
Our torch-applied installations are performed by certified technicians using hot-work safety protocols that meet insurance and OSHA requirements.
Modified bitumen is our recommendation for buildings with frequent rooftop equipment maintenance access — its puncture resistance outperforms all single-ply systems.
Installation Methods for Modified Bitumen
Torch-Applied: Hot-air welded for the strongest bond — ideal for most commercial applications. Cold-Applied: Uses adhesives instead of heat — required when hot work permits are restricted. Self-Adhered: Peel-and-stick application for areas where flames and adhesive fumes are prohibited. We select the method based on your facility's requirements, safety considerations, and local codes.
Modified Bitumen Lifespan and Maintenance
A properly installed modified bitumen system delivers 20–30 years of service. Key to longevity: proper drainage, regular inspection of seams and flashings, timely repair of any punctures from foot traffic, and periodic re-coating of granulated surfaces. Our maintenance programs are specifically designed to maximize the service life of modified bitumen systems.
Need Modified Bitumen Roofing?
Don't wait for the damage to get worse. Our Tyler-based team is ready to help — call now or schedule a complimentary inspection.