The Proven Workhorse of Commercial Roofing
Modified bitumen roofing has protected Tulsa commercial buildings for decades. Combining the waterproofing reliability of asphalt with the flexibility of polymer modification, modified bitumen (mod-bit) systems deliver multi-layer protection that withstands Oklahoma's extreme thermal cycling. Proof Construction installs SBS (styrene-butadiene-styrene) and APP (atactic polypropylene) modified bitumen systems from GAF, Firestone, and Carlisle.
Multi-Layer System Benefits
- SBS Modified Bitumen: Superior low-temperature flexibility for Oklahoma's freeze-thaw cycles. Remains pliable at -20°F, preventing cracking during winter thermal shock events.
- APP Modified Bitumen: Enhanced UV resistance for exposed membrane applications. Torch-applied for molecular bond strength.
- Multi-Ply Application: 2-4 ply systems provide redundant waterproofing layers. Each ply is staggered to ensure no seam aligns with the layer below.
- Surface Options: Mineral granule surface for UV protection. Smooth surface for reflective coatings. Foam-backed for enhanced insulation.