APP and SBS-modified bitumen systems deliver redundant waterproofing layers, superior puncture resistance, and the proven durability of asphalt — built for the most demanding commercial rooftops.
We install APP torch-applied, SBS cold-adhesive, and self-adhered modified bitumen systems — selecting the right method based on your building, climate, and access requirements.
Heat-fused APP membrane creates a fully-bonded, monolithic waterproofing layer. Extremely durable, fire-resistant surface with excellent UV stability.
Cold adhesive application — no open flame required. Ideal for occupied buildings or areas where torch application creates safety or code concerns.
Peel-and-stick modified bitumen for roofs where speed and safety are priorities. Clean, consistent installation with excellent adhesion.
Redundant base and cap sheet installation for maximum waterproofing protection — the preferred spec for critical facilities and demanding environments.
Contact us today for a free on-site assessment and proposal. No obligation, no pressure.
Modified bitumen is a multi-layer commercial roofing system made from asphalt modified with polymers — either APP (Atactic Polypropylene) or SBS (Styrene Butadiene Styrene) — for enhanced flexibility and durability. It is installed in multiple layers (typically a base sheet and cap sheet) for a robust, redundant waterproofing assembly ideal for flat and low-slope commercial roofs.
Modified bitumen can be installed using several methods: torch-applied (heat-fused with open-flame torches), cold-applied (using adhesives), hot-mopped (with hot asphalt), or self-adhered. The method depends on the specific product, building conditions, and code requirements. On Top Commercial Roofing's certified crews select the right installation method for your project.
A properly installed modified bitumen roof typically lasts 20 to 30 years. APP-modified systems tend to offer better UV resistance, while SBS-modified systems offer superior flexibility in cold temperatures. Regular maintenance and inspections help maximize the service life of any modified bitumen system.
Yes. Modified bitumen is well-suited for Texas commercial buildings. APP-modified bitumen systems perform especially well in high-UV environments like Texas due to their excellent heat and UV resistance. The multi-layer construction also provides redundant protection against the heavy rain and hail events common in the DFW area and across Texas.