St. Louis Commercial Roofing

Modified bitumen roofing is a cost-effective roofing product for St. Louis commercial and industrial buildings that have a flat roof.

Duration Construction has assisted hundreds of businesses in St. Louis over the years using modified bitumen as their roofing solution.

Sometimes referred to as APP, SBS, or mod bit, modified bitumen is an evolved form of traditional asphalt roofing. Made by combining asphalt with modifiers and solvents, the pieces are connected at the seam by using intense heat, creating a seal that water cannot permeate.

Other methods of installation can also be used, including cold applied, self-adhered, and weldable, where the seams are torched to fuse together. Duration Construction will go over all installation options available to you to find which will be most economical and beneficial for your commercial roof.

Benefits of a Modified Bitumen Roof on Commercial Property

Before the introduction of modified bitumen roofing in the 1970s, commercial and industrial buildings with a flat roof had few options other than asphalt and gravel. With this type of roofing application, various seams are used, which create entry points for water. This caused premature leaking in the roofs and a significant number of repairs to maintain.

Not only are leaks prevalent in the older asphalt and gravel roof construction, they are more difficult to locate. Modified Bitumen is a seamless application. Even if comprised, an imperfection is easy to locate and repair quickly. Another issue with asphalt as a roofing product by itself is it’s sensitivity to UV light rays from the sun. This causes early degrading of the material. The gravel used served the purpose of protecting the asphalt from the sun and in holding it in place as asphalt is not attached to the roof surface the way that modified bitumen is.

Modified bitumen also contains elements that allow it to reflect UV rays. Additionally, it is unaffected by expansion and contraction due to the lack of seams. Duration Construction roofing contractors work flawlessly with this innovative roofing product and can ensure that each application is executed to perfection.

What Modified Bitumen Manufacturers Does Duration Construction Work With?

Duration Construction is committed to providing only the highest-quality roofing products to our commercial and industrial clients. As a local company, we frequent your businesses too and have your best interests as our highest priority. To this end, we have developed excellent relationships with several modified bitumen manufacturers to provide competitively priced roofing solutions. Among them are well-respected names in the roofing product industry, including:

• Duralast
• Carlyle
• Versico
• Firestone
• Mule Hide

All of these roofing material manufacturers have an impeccable reputation for consistent high quality in their products.

Frequently Asked Questions About Modified Bitumen Roofing Products

The roofing experts of Duration Construction are dedicated to providing the best service to all of our clients, and take the time to answer any questions you have regarding your business roofing solutions and modified bitumen roofing products.

What does modified mean?

The traditional waterproofing medium, asphalt, is a primary component, but modified slightly to make it a more dependable roofing product on a commercial or industrial building. The most common modifiers used are SBS and APP, which give the asphalt better resistance to UV rays, among other things.

Is bitumen roofing available in a color other than black?

Yes, in some circumstances we will recommend a white modified bitumen roof for better energy efficiency for your building. This acts as a reflective material, bouncing heat away from the building.

What happens if a crack does form on the surface?

Cracks in a modified bitumen roof are easily identified and repaired using asphalt compounds. Cracks or breaks are rare, but can occur under extreme circumstances.

How long can I expect my modified bitumen roof last?

This type of roofing system will usually last 10 to 15 years, but that is a low average. With the expert installation done by Duration Construction and regular inspections of the surface, it could last 20 years or more.

Are there conditions that could affect the longevity of a modified bitumen roof?

Yes, a darker colored roof absorbs heat, which will cause premature aging of the material. So will an inadequately ventilated attic space below the surface of the roof. Extreme heat is the number one contributing factor to the durability of modified bitumen.

Commercial Roofing Contractors

Businesses across St. Louis are dependent on a durable roofing product to protect their building structures. Duration Construction takes this responsibility seriously, and will provide for you the absolute best-modified bitumen roofing product, applied with precision for maximum protection.

Protecting your business is a major priority and Duration Construction understands the urgency and importance to keep your business proficient and safe. We offer professional guidance and solutions to keep your day to day business operational.

• Low slope roofing systems
• TPO
• PVC
• EPDM
• Coatings
• Modified bitumen
• Built-up roofs