Modified Bitumen Roof Systems
Mike Huddleston Roofing Systems is a leading contractor in the modified bitumen roof systems industry in and around the DFW, Texas area.
We Specialize In Modified Bitument Commercial Roofing Systems
What Are Modified Bitumen Roof Systems?
Modified Bitumen roof systems are asphalt based and provide superior waterproofing characteristics. The typical life span for these systems is about 10 to 20 years. Modified Bitumen roofs are usually installed as a two ply system and are always fully adhered. These roof systems are made up of asphalt that has been modified with a polymer to create plastic or rubber like properties. The modifiers provide increased resistance to brittleness, cold temperatures and increased elasticity and strength.
The most common modifiers are APP (Atactic Polypropylene) and SBS (Styrene Butadiene Styrene).
The SBS Modifier
SBS modifier when combined with asphalt, produces rubberized properties. By adding 10%-15% SBS to the asphalt it is then able to be stretched six times its normal length and then can return to its original size once relaxed. This helps deal with the stresses of normal expansion and contraction of a roof. Reinforcements for SBS modified asphalt include fiberglass, polyester, or a combination of both. These membranes are most commonly applied with hot asphalt or cold adhesive. There are also self adhering SBS membranes, which contains an adhesive backing.
- Hot Asphalt application – Hot Asphalt is applied to the felts or substrate with the use of a machine or is physically mopped down and then the membrane is laid over the hot asphalt. The hot asphalt acts as the adhesive and allows the membrane to bond to the substrate.
- Cold Adhesive – The modified membrane is set in a cold process using specially formulated asphalt based adhesives as it is being applied.
- Self Adhered – The bottom surface of the membrane is covered with an adhesive and release paper. Once the paper is removed the adhesive allows the membrane to adhere to the substrate without the use of additional adhesives.
There are numerous surfacing options for APP and SBS modified roofs including factory applied mineral surfaces, gravel surfaces, smooth surfaces, and “cool roof” coatings, which are highly reflective coatings that can help save on cooling costs.
Modified Bitumen (MB) roofing is an asphalt-based, close cousin of the Built-up-Roof (BUR) designed for buildings with low-slope or “flat” roof structures. Engineered modified bitumen roofing membranes originated in Europe in the mid 1960′s and have been used successfully in the United States and Canada since approximately 1975.
Frequently Asked Questions
How Often Should You Inspect Your Roof?
It’s a good idea to inspect the roof several times during the year, especially in Winter and Spring, and then clear it off as needed. All of the leaves don’t fall at the same time, so one cleaning may not be enough.
How Can I Prevent Roof Damage?
Many types of roofs can be damaged by inexperienced people walking on them or working from them, and there is the danger of slipping or falling. If roof damage occurs, you are much more likely to develop a leak, so make sure it is an experienced person on your roof.
What Is The Main Cause of Roof Damage?
Roof leaks can be caused by many different things, however, 90% of all roof leaks are caused by improper installation or by defective metal flashing. Rarely does the actual roofing product fail.
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1285 North Main Suite 201
Mansfield, TX 76063
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