Modified Bitumen
A properly applied modified bitumen roof with its waterproof membrane can be the perfect solution for providing proper roof drainage and keep your building dry inside.
Modified Bitumen (MB) roofing is an asphalt-based, close cousin of the Built-up-Roof (BUR), designed for buildings with low-slope or “flat” roof structures. Modified Bitumen Roofing Systems are designed to withstand harsh exposure to extreme environmental elements. With five layers of protection, it’s one of the most trusted flat roofing systems used in the industry today.
Modified bitumen roofing South Florida property owners choose offers exceptional strength, long-term flexibility, and outstanding waterproofing—making it one of the most reliable commercial roofing options in our climate. Because South Florida buildings face extreme UV exposure, heavy rain, and hurricane winds, modified bitumen systems provide the durability needed to protect your investment. With proper installation and maintenance, these systems deliver decades of dependable performance.
What Is Modified Bitumen Roofing?
Modified bitumen is a multi-layer commercial roofing system made from asphalt reinforced with either APP (Atactic Polypropylene) or SBS (Styrene-Butadiene-Styrene). These added polymers improve flexibility, impact resistance, and overall durability. Because the system installs in multiple layers, it creates a strong, weather-tight surface ideal for flat and low-slope roofs commonly found on South Florida commercial buildings.
Benefits of Modified Bitumen Roofing
1. Extreme Weather Resistance
Modified bitumen performs well in intense heat, high humidity, and hurricane-force winds. The material expands and contracts without cracking, which helps protect your building year-round.
2. Strong Waterproofing
Multiple layers create excellent waterproofing. Additionally, seams are sealed using advanced methods that reduce the risk of water intrusion—a major advantage in South Florida’s rainy season.
3. Easy to Maintain
Because the system is durable and simple to repair, business owners benefit from lower long-term maintenance costs.
4. Versatile Installation Options
Modified bitumen roofing can be installed through:
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Torch-applied systems
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Peel-and-stick self-adhered membranes
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Cold-applied adhesives
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Hot asphalt applications
This flexibility allows us to choose the safest and most effective option for your property.
Why Modified Bitumen Works Well in South Florida
Because the material handles thermal expansion and contracting better than many roofing options, it remains stable under intense UV exposure and high heat. Additionally, its layered structure helps resist damage from flying debris during storm season—making it an ideal choice for local businesses.
Our Modified Bitumen Installation Process
We follow a detailed, manufacturer-approved procedure:
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Roof Inspection & Moisture Scan
We assess the roof deck, drainage, and existing materials. -
Surface Preparation
We clean the surface thoroughly to ensure proper adhesion. -
Applying Base Layer
A base sheet is installed to create the foundation for the modified bitumen membrane. -
Installing Modified Bitumen Membrane
Based on your system type, we apply the membrane using heat, cold adhesive, or self-adhesion. -
Sealing and Detailing Flashings
We reinforce edges, penetrations, and seams for long-term protection. -
Final Quality Inspection
We verify all seams, transitions, and layers meet manufacturer specifications.
The framework for Modified Bitumen Roofing Systems is a five-layer combination of roofing components.
- Insulation – Used to provide “R” value, or thermal resistance, for temperature stability of the roof system
- Modified Base Sheets or Plies
- Modified Bitumen Membranes – Factory fabricated sheet membrane composed of co-polymer reinforced with polyester or fiberglass
- Adhesive – Waterproofing material with a bonding agent applied either hot or cold
- Surfacing – Provides UV protection and weathering resistance
APP vs. SBS Modified Bitumen
APP (Atactic Polypropylene)
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Offers superior UV resistance
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Performs best under high heat
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Creates a rigid, durable surface
SBS (Styrene-Butadiene-Styrene)
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More flexible and elastic
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Handles structural movement well
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Ideal for roofs with frequent foot traffic
During our inspection, we evaluate your roof’s slope, existing material, and building use to recommend the best system.