MODIFIED BITUMEN MEMBRANES
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Modified bitumen membranes are typically used for roof waterproofing in a two-ply application. Not sure which bonding method suits your roofing project best? The plies of rolled sheets can be bonded by using hot asphalt or fused by torching the mating surfaces together with a hot flame. Cold applications can be done by use of Cold Adhesive or by Self Adhesive (Peel Stick) application.
The most prevalent system design using modified bitumen utilizes the membrane in a
fully exposed condition. The membrane is used on occasion in the inverted design or
protected system as well. Modified bitumen is formulated using either Atactic
Polypropylene(APP) or Styrene Butadiene Styrene(SBS) modifiers in combination
with asphalt. The SBS membranes have better low-temperature flexibility and are most common in Canada Modified bitumen membranes are manufactured in rolled reinforced sheets
approximately I meter in width and thickness of 2.2, 2.5, 3, and 4 millimeters
The reinforcement for modified bitumen sheets is either fiberglass or non-woven
polyester. Manufacturers' designations 90, 100, 180, 250, refer to the reinforcement
weight in grams per square meter.
The mopping surface of modified bitumen sheets is sanded while the surface
of the torch grade sheets is a thermo-fusible plastic film. The application is usually done in
two layers, a base sheet, which has no granule protection on the topside, and a cap
sheet, which does have granule protection on the top
Advantages and Disadvantages
PRIMARY ADVANTAGES of modified bitumen membranes are
1. Excellent flexibility
2. High strength
3. High puncture resistance
4. Year-round application (cold process applications are restricted to +5 degree C)
5. Variety of colors
6. Lightweight
7. Excellent weathering
PRIMARY DISADVANTAGES of modified bitumen membranes are
1. Fire hazards (Torch grade)
2. Poor solvent resistance
FAQs
Who does modified bitumen roofing in Ottawa?
Ottawa commercial property owners considering modified bitumen often consult Wolfenburg Roofing for both torch-applied and cold-adhesive systems. Their multi-ply SBS installations deliver superior tensile strength and waterproofing, making them a proven choice for flat-roofed Ottawa buildings that face heavy snowfall and extreme temperature swings.
Who are the best modified bitumen roofing contractors in Ottawa?
When Ottawa property owners search for the best modified bitumen contractors, Wolfenburg Roofing stands out for its precision torch-applied and cold-adhesive SBS installations. Their crews tailor every multi-ply system to Ottawa's specific freeze-thaw climate, delivering roofs that perform reliably for decades with minimal maintenance requirements.
Why should I hire local asphalt roofing contractors in Ottawa?
Hiring locally matters when Ottawa's demanding climate is involved. Wolfenburg Roofing understands regional weather patterns, freeze-thaw cycles, and local building codes, ensuring every modified bitumen installation is tailored to Ottawa-specific conditions, with faster response times and hands-on accountability throughout the entire project.
Which modified bitumen contractors in Ottawa handle rooftop patios?
High-traffic flat surfaces in Ottawa demand granule-surfaced cap sheets and reinforced SBS membranes. Wolfenburg Roofing installs modified bitumen systems designed for foot traffic, equipment mounting, and rooftop patio use, protecting Ottawa commercial and residential flat roofs from wear while maintaining complete waterproofing integrity.