Asphalt Roofing Systems

Modified bitumen roofing systems are comprised of a membrane made from asphalt and a base mat which is lain over the roof in rolls. The seams are typically heated and welded together, or can be adhered together with cold-applied adhesive methods. Asphalt is made from naturally occurring bitumen and is blended with a proprietary mix of solvents and rubber modifiers. The resulting material is highly viscous, sticky, and waterproof. We would be glad to install your modified bitumen roof in Billings, MT.Modified Bitumen Roof in Billings, MT

Rubber modifiers help achieve the desired physical traits once the modified bitumen is rolled and prepared for shipping to its final destination. SBS and APP are the most common types of modifiers added during manufacturing. Styrene-Butadiene-Styrene helps improve flexibility and can provide for a wider range of expansion and contraction in hot or cold weather. Atactic Polypropylene helps improve the longevity of the roof by affecting the aging process.

If you need a modified bitumen roof in Billings, MT to be repaired or replaced, we can help! The expert roofers at Donahue Roofing are here to keep your building protected from the elements. Call us today for a FREE estimate! (406) 248-5428

Base Materials

The base mat is made from organic felt or fiberglass. Organic felt is made from materials found on once living organisms, such as rag fiber or cellulose fiber. Synthetic base mats are becoming increasingly popular. Polyester, fiberglass, and formerly asbestos are common materials found in synthetic base mats. Asbestos has been outlawed since the 1980’s, but is still in use on older buildings. It is important to have a qualified asbestos abatement contractor safely remove any asbestos in your building before replacing it with a more modern roofing system. Polyester is a more flexible base material, while fiberglass offers more rigidity. Each is lighter, more resistant to tears, and is more waterproof than organic base mats.

Benefits of a Modified Bitumen Roof

  • Extremely Durable
  • Easy to Repair
  • Weather Resistant
  • Easy to Install and Maintain
  • Flexible

The roofing contractors at Donahue Roofing can help with the repair or installation of your modified bitumen roof in Billings, MT. Whether on a smaller building or a larger commercial property, we have the experience and equipment necessary to properly repair your roof and ensure your property is well-protected for years to come. (406) 248-5428