Modified Bitumen



Modified Bitumen


Modified Bitumen: The Choice For Flat And Low Slope Roofs

Modified bitumen roofing is an asphalt-based solution designed for buildings with low slope or flat roof structures. It can be installed by heat-welding, hot-asphalt, and cold-process adhesives and is considered one of the most popular roofing systems.

If you need a commercial roof replacement, modified bitumen is a high-performance solution that offers ease of application and long term efficiency. Although there are layers involved in mod-bit roofing because of the recommended underlayment, it is considered a singly-ply, not a built-up roofing system.

There are two types of modified bitumen systems:

APP (Atactic Polypropylene)

Applied using a heat-welded method, the top surface comes in either smooth or granular. The consistency and uniformity of the factory produced sheet results in a membrane that has greater stability and flexibility than that of a laminated built-up roof system.

SBS (Butadiene Styrene)

Usually applied using hot asphalt, bonding adhesives, heat welding or heat activated self-adhesives, the top surface is a mineral granular of choice of colors. It has the benefits of a built-up redundant system with the quality of a factory single ply membrane.

Concord Roofing & Construction is recognized as one of the top commercial roofing repair and replacement contractors in Texas. We provide a best-in-class customer service experience that includes superior materials and expert installation at a competitive price.

The Modified Bitumen Roofing System Advantage


It’s Tough

The combination of fiberglass and/or polyester reinforcement layers makes modified bitumen extremely tear-resistant, a big advantage over other commercial roofing systems. This feature makes modified bitumen roofing the ideal choice for low-slope commercial roofing with high foot traffic, such as rooftop cafes


It’s Waterproof

Several layers of bitumen on a properly-installed roof makes modified bitumen roofs the most waterproof commercial roofing choice available.


It’s Efficient

It’s easy to turn a modified bitumen roof into an energy-efficient “cool roof” simply by treating the top layer with features such as solar reflectance and thermal emission.


It’s Flexible

Low-slope and flat roofing materials have to be flexible for impact resistance and temperature fluctuations. Modified bitumen expands and contracts without losing its shape.


At Concord Roofing & Construction, we have extensive experience providing quality commercial roof installations to satisfy all your roof repair and replacement needs. All roofing systems we install are guaranteed by the manufacturer for material performance and we are in compliance with strict installation standards.



We pride ourselves on being trusted by our clients and recognized in our industry as leaders.

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