Modified Bitumen Roofing in Billings, MT
Modified bitumen roofing combines the proven performance of built-up roofing with modern polymer technology. APP (Atactic Polypropylene) and SBS (Styrene-Butadiene-Styrene) modified membranes provide superior waterproofing for commercial flat roofs across Billings, Montana.
APP vs SBS Modified Bitumen
APP (Plastic Asphalt)
- • Plastic-like consistency
- • Better UV resistance
- • Ideal for hot climates
- • Torch-down application
- • Less flexible in cold
SBS (Rubber Asphalt)
- • Rubber-like flexibility
- • Superior cold-weather performance
- • Better for Montana climate
- • Torch-down or cold adhesive
- • Self-healing properties
Why Choose Modified Bitumen?
- Multi-Ply Protection: 2-4 layers provide redundant waterproofing
- High-Traffic Ready: Walkable surface withstands foot traffic and maintenance
- 15-20 Year Lifespan: Durable asphalt-based construction
- Puncture Resistant: Thick membranes resist damage from debris
- Easy Repairs: Localized damage can be patched quickly
Installation Methods
Torch-Down
Propane torch melts the asphalt backing, bonding the membrane to the substrate. Creates a watertight seal. Requires certified installers.
Cold Adhesive
Asphalt-based adhesive applied with roller or spray. No open flame, safer for occupied buildings and sensitive areas.
Self-Adhered
Peel-and-stick membranes with release film. Fastest installation, no special equipment needed.
Modified Bitumen Cost
Modified bitumen roofing costs $5.00–$8.00 per square foot installed in Billings. Factors affecting price:
- • Number of plies (2-ply vs 3-ply vs 4-ply)
- • Installation method (torch, cold, self-adhered)
- • Insulation requirements
- • Roof complexity and penetrations
- • Tear-off of existing roofing
Free Modified Bitumen Estimate
Call Billings Flat Roof Contractors at (406) 500-9154 for modified bitumen roofing installation or repair.
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