Modified Bitumen Roofing
Modified Bitumen is an evolution of traditional built-up roofing (BUR) that combines the proven waterproofing of asphalt with modern polymer modifiers. This creates a flexible, durable membrane ideal for Florida's flat and low-slope commercial roofs.
RSA Hurricane Rating: Good
Solid choice with some considerations
Quick Specifications
Why Choose Modified Bitumen Roofing?
Proven Waterproofing
Asphalt-based technology has protected buildings for over a century. Modified bitumen adds flexibility.
Easy Repairs
Damage is easily repaired with compatible materials. Patches bond seamlessly to existing roof.
Budget Friendly
Lower initial cost than many single-ply options with proven performance.
Multi-Ply Protection
Multiple layers create redundant waterproofing protection.
Reflective Options
Cool roof coatings and granulated surfaces provide energy efficiency.
Walkable Surface
Provides a durable surface that can handle regular foot traffic.
Hurricane Performance in Florida
How Modified Bitumen Roofing stands up to Florida's toughest storms
Storm Resistance
Important Considerations
Miami-Dade NOA Approved: Several modified bitumen systems have Miami-Dade NOA approval when installed with approved methods and edge details. Not as widely used in HVHZ as TPO or PVC.
Florida-Approved Manufacturers
We only install products with Florida Product Approval and Miami-Dade NOA certification
20 Year System
20 Year System
20 Year System
20 Year System
20 Year System
15 Year System
Ideal For
- Budget-conscious commercial projects
- Buildings requiring walkable roof surfaces
- Restaurants with rooftop equipment
- Existing modified bitumen replacement/recover
- Multi-tenant buildings with interior access needs
- Applications where repairs may be frequent
Consider Alternatives If
- High-Velocity Hurricane Zones (better options available)
- Coastal properties seeking maximum wind resistance
- Buildings where maximum lifespan is priority
- Properties seeking lowest energy costs (TPO better)
- Applications requiring pristine appearance
Maintenance Tips
Keep your Modified Bitumen Roofing roof performing at its best
Annual Inspections
Check for blisters, cracks, and seam separations especially after hot summers.
Coating Maintenance
Reflective coatings may need reapplication every 5-10 years.
Drain Maintenance
Keep all drains and scuppers clear to prevent ponding.
Blister Repair
Address blisters promptly before they split and allow water entry.
Seam Inspection
Check seams and flashings annually for adhesion issues.
Ponding Correction
Address any areas where water ponds for more than 48 hours.
Ready to Get Started with Modified Bitumen Roofing?
Get multiple same-day estimates and your Roof Health & Storm Readiness Report
Or call us at 855-443-ROOF