Roofing Types
Flat roofs are traditionally found on commercial and industrial buildings, but they can also be installed on low sloped residential homes. The Roofers are well-versed in a variety of different roofing systems, and we are ready to apply our expertise to your next roofing project.
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The modified bitumen systems were developed in Europe during the 1960’s and were brought to the North American marketplace in the early to mid-1970’s.
The key to these membrane roofing solutions is the controlled manufacture of a heavy roofing sheet (usually 120 to 180 mils thick). These are made from multiple layers of asphalt and reinforced around a core of plastic (APP) or rubber (SBS) modifiers.
These systems are then installed by heat welding, using a special torching apparatus or they are hot mopped into place using new or conventional methods of asphalt application.
The standout characteristics of mod-bit systems are in their toughness, lightweight loading, and resistance to wind and fire. They also provide a long-lasting surface that is easy to inspect and maintain.
Built-up roofing (“B.U.R.”) has long been considered the traditional roofing material in Canada, and predominantly found on commercial and industrial buildings. It enjoys a long and illustrious track record of success. The multi-ply configuration provides additional layers of protection against moisture penetration along with somewhat of a self-sealing property during warm weather.
In a B.U.R., the felts act as reinforcement for the thin layers of waterproofing bitumen (asphalt or coal tar pitch) roof coatings.
The system is typically surfaced with aggregate (typically pea-gravel) set in a flood coat of bitumen for purposes of reflecting ultraviolet rays, severe weather, and impact protection.
B.U.R. systems are durable, long lasting, and relatively resistant to construction and post construction traffic. They are appropriate for both a new flat roof and a flat roof replacement.
Thermoplastic polyolefin (TPO) roofing membranes are a type of commercial roofing product that offers benefits both in terms of installation – relatively simple compared to other roofing products — and performance – resistant to ultraviolet (UV) rays. The term polyolefin comes from two words – namely polymer and filler.
Blending polymer and filler, such as fiberglass, carbon fiber and rubbers, creates a TPO single-ply membrane that is resistant not only to UV rays, but also to ozone and chemical exposure.
