Modified bitumen roofing is a multi-ply flat roofing system that combines asphalt with polymers for flexibility and strength. At L&L Roofing & Construction, we install modified bitumen using several proven methods depending on the building’s needs and safety requirements.
Main Installation Methods
Torch-Down (Heat-Welded)
- A propane torch melts the asphalt underside to bond it directly to the substrate.
- Creates a seamless, watertight layer.
- Common for commercial applications where open flame use is permitted.
Cold-Applied Adhesive
- Uses liquid adhesives instead of heat.
- Safer installation with no open flame.
- Provides strong bonding for multiple layers.
Self-Adhered (Peel-and-Stick)
- Pre-applied adhesive backing is peeled away during installation.
- Simple, flame-free method often used for smaller jobs or residential flat roofs.
- Clean installation with less odor and faster application.
Hybrid Systems
- Combine layers and methods for maximum durability and redundancy.
FAQ: How Is Modified Bitumen Installed?
Q: Which installation method is best?
A: It depends on your building. Torch-down is highly durable, while cold-applied and self-adhered systems are safer in sensitive environments.
Q: How long does installation take?
A: Most projects take a few days to a week, depending on roof size and preparation needs.
Q: Do all methods provide the same lifespan?
A: Yes—when installed correctly, all modified bitumen systems can last 20–25 years.
Q: Can modified bitumen be installed over an existing roof?
A: Sometimes. If the existing roof is in good condition and local codes allow it, overlays may be an option.
At L&L Roofing & Construction, we believe in doing the right thing—because it’s the right thing. That means choosing the safest and most effective installation method for your property, not just the quickest one.
Call us today at (770) 874-0372 to schedule a consultation and learn more about modified bitumen roofing installation in Gainesville and nearby areas.