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Commercial Industrial Flat Roof Types/ Systems

With our years of experience we can repair or replace almost any type of commercial industrial roof. We specialize in:

TPO (Thermo-plastic Polyolefin)

TPO RoofingIt is relatively new in the roofing market but has a high return for its cost. EPDM is a synthetic rubber while TPO is a rubber-like plastic. Lightweight, completely waterproof, resistant to punctures and tears and highly flexible (important when considering the temperature fluctuations of winter and summer). TPO also is available in white colour resulting in a highly reflective surface that can save you heating and cooling costs. Some manufacturers of TPO roofing materials also market it as “seamless” due to the hot-air welded seams – a much stronger alternative to adhesives.

TPO is typically based on polypropylene and EP (ethylene-propylene) rubber polymerized together using state-of-the-art polymer manufacturing technology. This technology enables the production of TPO membranes that are flexible at low temperatures without the use of polymeric or liquid plasticizers.

Unlike some other popular thermoplastic roofing membranes, the TPO polymer does not contain chlorine and no chlorine-containing ingredients are added during sheet production. This lack of chlorine allows TPO marketers to advertise their membrane as an environmentally safe, “green” product.

The TPO resin is compounded with other components including a weathering package, fire retardants and pigments for color to create a product that can withstand the elements associated with rooftop exposure. Sheet are available in varying widths up to 3.66m and membrane thickness is typically 1.1 or 1.5 mm although membrane up to 2.0 mm is also available.

If you are not sure what type of roof you have, or if you are in need of flat roof repair, give us a call.

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EPDM (Ethylene Propylene Diene Monomer)

EPDM RoofingOne of the most popular commercial roofing options is EPDM roofing. Epdm roofing systems are lightweight and simple to install. It is a single-ply membrane like TPO and PVC made of synthetic rubber which has been improved over the years so that current EPDM roofing systems are incredibly durable, tear and highly puncture resistant while maintaining flexibility. EPDM roofs have superior resistance to extreme heat and fire, and ultraviolet radiation.

This type of roofing system is applied using a fully-adhered glue system, loose-laid with gravel or mechanically fastened. None of which require an open flame. The use of adhesive and nails to install results in the environmental benefits being reduced emissions from the amount of equipment needed to install it, there are fewer petroleum based product s and less landfill waste.

When proper insulation is used EPDM can also help to reduce your buildings heating and cooling costs.

Some argue that this type of roofing system is not the most aesthetically pleasing but then that is generally insignificant to a building owner. Alternatively, this type of roof is available in different colours like white grey or black and it can be manufactured in wide rolls to minimize the number of seams.

Single-Ply roofing systems are ideal for retro-fits because it costs less than a complete re-roof and is less intrusive. The job just needs to be done professionally.

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BUR (Built-Up Roofing)

BUR Flat RoofingBuilt-Up Roofing (BUR – “tar and gravel” – coal tar - asphalt and gravel) is the most classic “tar and gravel” system of roofing. Traditionally flat roofs have been installed by setting three - four layers of coal tar with coal tar saturated felts (tar-paper). Typically, the surfacing is gravel set in a flood-coat of hot asphalt. Coal tar is a by-product of the coal manufacturing process and makes an excellent water and oil resistant material. An unusual feature of a coal tar roof is its’ ability to soften in warm temperatures and "heal" itself. The warmer the temperature the faster and easier the membrane adjusts to changing conditions sealing minor ruptures and abrasions helping to keep it young.

BUR can be expensive on new constructions because of the increased cost of oil causing asphalt built up roofs have be one of the more expensive roofing systems to install. However, tar and gravel flat roofing systems have a long service period if it is well maintained and repaired.

It is always important to consider your location in the world when choosing a roof because of important factors like ultra violet rays. An asphalt and gravel roof can be adversely affected by ultra violet rays and will not maintain its integrity if water is ponding on top of it because it is moisture resistant rather than moisture proof. Alternatively Coal Tar Built-up roofing has a molecular structure that provides a natural resistance to water, ultraviolet rays and chemicals -things which are commonly found in a rooftop environment.

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Modified Bitumen Roof

Modified Bitumen RoofingModified Bitumen (MB) is asphalt that has had modifiers added to it to give it plastic or rubber-like properties. Installed in layers which are either torch welded or adhered using factory applied adhesive Modified Bitumen can be a cost-effective alternative. The longevity and warranty received on the product is dependent on the maintenance, quality of and number of layers installed.

Engineered modified bitumen originated in Europe in the mid 1960's and has become a standard commercial roof application and has been being successfully used in Canada since approximately 1975.

There are numerous surfacing options for this system which include a factory applied mineral surface, gravel surface, including “cool roof” coatings which are highly-reflective to save on building cooling costs. Mineral-surfaced roofing products are typically furnished with white granules, but are also available in designer colors to match asphalt shingles or to otherwise compliment the overall building design.

The latest innovation to modified bitumen is the self-adhering sheet. Using special combinations of polymers to modify the underside of the sheet, the rolls are manufactured with a release paper. When we remove the release paper and the sheet is rolled out, the sheet adheres itself to the substrate. This method eliminates the risks associated with the use of torches, hot asphalt, and is completely free of VOC (volatile organic chemicals) fumes during and after roof application.

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PVC (Poly Vinyl Chloride)

PVC RoofingPVC (Poly Vinyl Chloride) roofing is another popular choice for commercial applications. Flexible, durable, with little seams or joints and with quick and simple installation. PVC roofing is also chemical resistant making it excellent for applications for restaurants or other sites where grease or chemicals would otherwise eat away the membrane over time. Available in reflective colours as well, PVC Roofing is often times toted as the best roofing material available.

PVC meets all applicable building codes. PVC membranes also meet the cool roofing requirements of EnergyStar®, Green Globes™, and LEED®.

PVC is one of the most durable waterproofing options. It is a product that has proven it can serve its purpose for a longer period of time without need for replacement. This type of roofing also has an established end-of-life recycling program that converts the old membrane back into roofing membrane products. More in the way of environmentally friendliness, 47% of the PVC resins raw materials are derived from petroleum, less than any other single ply membrane. The remaining 53% are derived from salt.

As with most roofing materials, it is naturally fire retardant and will self extinguish with the removal of the flame source.

We do not want to promote any certain roofing material over another because the location of your roof and its surrounding environment are key factors in choosing a roofing system. Also, your available building finances must be taken into consideration. Some companies choose to invest in a more cost effective roof and then a maintenance program to extend the life of the roof while others choose to spend more on the roof and a more spread out maintenance plan. Call us to discuss which roofing system is right for you.

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Latest News & Posts

Commercial Industrial RoofingRoof Scan.ca Acquired by Roof Maintenance.ca In a push to provide the Greater Toronto Area with the highest quality commercial and industrial flat roofing services available, Roof Maintenance.ca has acquired ownership of infrared flat roof inspection expert and industrial roofing contractor Roof Scan.ca. This unification of companies will create the most effective commercial and industrial roofing services the Greater Toronto Area [...] Read more