Commercial Roofing


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Built Up & Single Ply

Built-up roofing is used primarily for roofs with no slope. This method of roofing has existed for more than 150 years and is an extremely popular solution for flat roofing. Built-up roofing is made up of multiple layers of roof felts alternating with layers of bitumen to create a finished membrane. These systems are often called “tar and gravel” roofs because a layer of gravel is applied over the asphalt layers to secure the membrane. Built-up roofing is a popular choice because it is the least expensive of the four main types of flat roofing materials. Drawbacks are that built-up roofing is heavy and not as easy to install as some of the lighter alternatives.

Modified Roofing

This rolled material can either be applied using heat or peel-and-stick methods. Modified bitumen is available in light colors that can also reflect direct sunlight and create a cool roof that will create significant energy savings for the home.

What is Bitumen?

Bitumen is a refined petroleum product, more commonly known as “asphalt.” It is a strong and durable adhesive that binds together a wide variety of other materials without affecting their properties. Bitumen/asphalt is insoluble in water, it resists corrosion by most acids, salts and alkalis, and doesn’t contaminate water. It is a thermoplastic material: it softens with the application of heat and hardens as it cools. It is available virtually the world over and is economical.


From tools to fasteners, Pioneer Builders Supply carries over 500 different products to make your project seamless from start to finish.

Related Products

Roofing ventilation and underlayment are critical components of every project. Speak to our expert staff to ensure you invest in the best possible system for your job.