What is modified bitumen roofing?

Modified bitumen is an asphalt-based commercial roofing system reinforced with polymers for added strength and flexibility. It is commonly installed on flat and low-slope roofs and is designed to withstand extreme temperatures, foot traffic, and weather exposure.

How long does a modified bitumen roof last?

A properly installed and maintained modified bitumen roof typically lasts 20–30 years. Routine inspections and minor repairs can extend its service life even further.

What are the different installation methods?

Modified bitumen can be installed using several methods, including torch-applied, cold-applied adhesive, self-adhered sheets, and hot-mopped systems. The best method depends on building type, safety requirements, and site conditions.

Is modified bitumen good for ponding water?

Yes. Modified bitumen systems are highly resistant to standing water, making them an excellent choice for flat roofs where drainage may be limited. SBS-modified systems, in particular, perform well in fluctuating temperatures and wet conditions.

How does modified bitumen compare to TPO or EPDM?

Modified bitumen offers superior puncture resistance and durability in high-traffic areas compared to many single-ply systems. While TPO and EPDM are lighter and highly reflective, modified bitumen excels in longevity, repairability, and overall toughness for demanding commercial environments.

Modified Bitumen Roofing

In Manteca, CA

oVER 30+ years experience. wE ARE licensed, bonded & insured.

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High-Performance Flat &
Low-Slope Roofing

Modified bitumen is one of the most dependable roofing systems for flat and low-slope roofs, and Avalon Roofing Services is Manteca’s trusted expert for these high-performance applications. With over 30 years of local experience, we provide professional modified bitumen installation, repair, and replacement in Manteca, CA, for commercial, industrial, and multi-unit residential properties.

Designed for strength, flexibility, and waterproof protection, modified bitumen performs exceptionally well in Central Valley conditions. These systems resist punctures, handle thermal movement, and provide long-term durability for warehouses, office buildings, retail centers, and apartment complexes. We install torch-applied, self-adhered, and cold-applied systems to meet your building’s needs, safety requirements, and code standards.

When property owners search for “flat roofing near me” or “modified bitumen roofing in Manteca,” they choose Avalon Roofing for precision, compliance, and lasting performance. We evaluate your roof honestly, engineer the right system, and deliver a watertight solution built to protect your investment for years to come.

ROOFING SOLUTION

Types of Modified Bitumen Roofs We Install

Modified bitumen roofing is a durable, flexible, asphalt-based system designed for flat and low-slope roofs. It’s engineered with polymer modifiers to improve strength, elasticity, and weather resistance. There are two primary types of modified bitumen roofing, plus several installation methods.

SBS
(Styrene-Butadiene-Styrene)

SBS Modified Bitumen is a high-performance flat and low-slope roofing system engineered with rubberized polymers that make asphalt flexible, elastic, and highly durable. The SBS modifier allows the membrane to expand and contract with temperature changes—much like rubber—without cracking or splitting. This flexibility makes SBS one of the most reliable roofing solutions for buildings exposed to wide temperature swings and seasonal movement.

APP
(Atactic Polypropylene)

APP Modified Bitumen is a premium flat and low-slope roofing system engineered with plastic-modified asphalt that delivers exceptional heat resistance, UV stability, and long-term durability. The APP polymer gives the membrane a tougher, more rigid structure than rubber-modified systems, allowing it to perform extremely well in hot, high-sun climates. Unlike rubberized SBS membranes, APP membranes are designed to maintain their shape and strength under prolonged heat exposure, making them ideal for roofs that endure intense sunlight and high surface temperatures.

Luxury Asphalt Shingles

Luxury asphalt shingles are high-end architectural shingles designed to deliver the best combination of look, performance, and longevity among asphalt roofing options. They’re often marketed as designer, premium, or high-profile shingles and are a step above standard architectural shingles.

BENEFITS OF Modified Bitumen ROOFING

Modified bitumen roofing is a proven solution for flat and low-slope roofs, offering exceptional durability, flexibility, and long-term protection. Engineered with reinforced asphalt and advanced polymer modifiers, this system resists punctures, cracking, and weather-related wear while maintaining a seamless, watertight barrier against leaks and standing water.

Designed to expand and contract with temperature changes, modified bitumen performs reliably in both extreme heat and cold. With multiple installation options and a service life that often exceeds 20–30 years, it delivers outstanding performance, low maintenance, and cost-effective protection for commercial and industrial buildings.

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Modified Bitumen Roof Frequently Asked Questions

What is modified bitumen roofing?

Modified bitumen is an asphalt-based commercial roofing system reinforced with polymers for added strength and flexibility. It is commonly installed on flat and low-slope roofs and is designed to withstand extreme temperatures, foot traffic, and weather exposure.
How long does a modified bitumen roof last?

A properly installed and maintained modified bitumen roof typically lasts 20–30 years. Routine inspections and minor repairs can extend its service life even further.
What are the different installation methods?

Modified bitumen can be installed using several methods, including torch-applied, cold-applied adhesive, self-adhered sheets, and hot-mopped systems. The best method depends on building type, safety requirements, and site conditions.
Is modified bitumen good for ponding water?

Yes. Modified bitumen systems are highly resistant to standing water, making them an excellent choice for flat roofs where drainage may be limited. SBS-modified systems, in particular, perform well in fluctuating temperatures and wet conditions.
How does modified bitumen compare to TPO or EPDM?

Modified bitumen offers superior puncture resistance and durability in high-traffic areas compared to many single-ply systems. While TPO and EPDM are lighter and highly reflective, modified bitumen excels in longevity, repairability, and overall toughness for demanding commercial environments.

Want to learn more? Get a free estimate scheduled with our asphalt roof professionals. We’d love to show you how a new roof can transform your home.