Proven Protection for
Flat & Low-Slope Roofs
For property owners in Florida seeking exceptional waterproofing performance and long-term value, RoofSource Inc. installs high-quality modified bitumen two-ply roofing systems designed for superior durability and leak prevention. This proven flat roofing technology combines modern polymer enhancements with time-tested installation methods to create a resilient, weather-resistant system tailored to Florida’s hot climate and heavy rain.
The Science Behind Modified Bitumen
Advanced Asphalt Technology for Modern Roofs.
Modified bitumen membranes represent a major advancement over traditional asphalt roofing. These systems use asphalt that is reinforced with specialty polymers—typically Atactic Polypropylene (APP) or Styrene-Butadiene-Styrene (SBS)—and reinforced with polyester or fiberglass mats for added strength.
The result is a flexible, impact-resistant, and temperature-tolerant roofing material that outperforms conventional asphalt roofs. Modified bitumen roofs are especially valued for their resistance to UV exposure, thermal movement, and water infiltration, making them a reliable option for both commercial and residential flat roofs throughout Florida.
Benefits of a Two-Ply Modified Bitumen System
Multi-Layer Protection for Long-Term Performance
This multi-layer approach creates a durable, low-maintenance roofing solution that stands the test of time—especially important for Florida property owners dealing with intense sun, high humidity, and tropical storms.
Superior Waterproofing
Redundant membranes provide multiple barriers against water intrusion for added peace of mind.
Enhanced Durability
Dual reinforced layers improve puncture resistance and tear strength, even under heavy use.
Temperature Stability
Designed to handle Florida’s seasonal temperature swings and high heat without premature failure.
Efficient Installation
Reduced installation time and structural load compared to older built-up roofing systems.
Modified Bitumen, Long-Lasting Flat Roof Solution.
In this video, we take you behind the scenes of a recent roofing project in Largo, Florida, where we removed multiple layers of roofing—including a surprising amount of mulch—and completely rebuilt the system from the
deck up.
To solve drainage issues, we installed an ISO board system to create slope on the flat roof before applying a new Modified Bitumen roofing system. We partnered with the City of Largo throughout the process to ensure the project met every requirement and was completed to the highest standard.
Project Highlights:
• Removal of debris and multiple roof layers
• Installed ISO board to create proper drainage slope
• New Modified Bitumen roofing system
• Coordinated with the City of Largo
• Durable, long-lasting flat roof solution
Tapered ISO Board Insulation for Better Performance.
For flat or low-slope roofs, proper drainage is critical to preventing ponding water and extending roof life. RoofSource Inc. offers the installation of tapered ISO board insulation beneath modified bitumen roofing systems. This energy-efficient, lightweight insulation can be customized to create slope and direct water toward drains, reducing the risk of leaks and water damage while improving overall energy performance—without major structural changes.
Cost-Effective, Proven Flat Roofing Technology
Modified bitumen remains one of the most cost-effective flat roofing options available today. Compared to some single-ply systems like TPO or PVC, it can offer lower initial installation costs, excellent long-term durability with minimal maintenance, proven waterproofing and UV resistance, and straightforward repairs when needed. For property owners seeking a balance of performance, affordability, and proven waterproofing, a modified bitumen roofing system is a smart investment in the future of their building.
Get a Free Modified Bitumen Estimate
Whether you’re replacing an aging flat roof or designing a new structure, RoofSource Inc. can help you choose the best roofing system for your needs. Our experienced Florida roofing team will provide a free on-site assessment and detailed estimate for your modified bitumen roof installation—including optional tapered ISO board insulation for improved drainage and performance.