The Modified Bituminous Membrane (MBM), is a traditional waterproofing method for flat roofs. It has been around a long time for the main reason that it works well and lasts a long time. When other methods have been used to waterproof your roof and failed, the MBM will most likely do the job.
What are the Advantages?
The advantages of this material are numerous. It has a proven track record of maintaining its waterproof attributes even in the harshest of conditions. It is esthetically pleasing to look at compared to some other types of materials, making it a perfect choice for residential applications. It is rot-proof and protects the sub-structure from rot and moisture, and the most important attribute this method of waterproofing has is it is quite effective in protecting the building from water infiltration even in high rainfall areas, making it an ideal solution for the climate we have here in Southern Ontario.
What is MBM?
Bitumen is a sticky, black, viscous liquid or semi-solid form of petroleum. It is mainly used in road construction or flat roof installations to waterproof the structure. It is blended with a polymer to give it excellent heat and cold flexibility. Once the polymer modified bitumen is created, it is applied to a non-woven polyester/fiberglass cloth which has excellent tear, stretch, puncture and movement resistance. It comes in rolls, which are easy to apply to the roof structure with minimal effort.
Economics of MBM
MBM comes with an excellent manufacturer’s warranty that is at least 10 years or more making it very economical. In most cases, the life expectancy far exceeds the manufacturer’s warranty. It is inexpensive to install, and in cases where the roof is also an access point, like a terrace, it is safe to walk on. Most professional flat roofing contractors are trained to install this type of roof so you can select the contractor with the best price and guarantee.
Precautions
Like any other roofing material, proper preparation of the roof surface is the key to having your roof last a long time. The surface needs to be thoroughly cleaned and free from dirt and debris prior to any part of the membrane being installed. The slope of the roof also has to be determined to make sure there are no low spots as standing water will be detrimental to the life of this material. Any good roofing contractor can ensure these standards are met.
Conclusion
This material, when properly installed, takes advantage of polymer science by creating a durable, long lasting material that is strong, non-degradable, and impermeable making it an ideal choice for your flat roof installation. Call your local contractor to discuss if this material is right for your particular installation.