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The right commercial roofing specialists for your building!

A leaking roof can affect the structural integrity of a building and the health of its occupants. During spring, summer or fall, a roof that leaks water can lead to considerable damage and, eventually, the presence of mold. During the winter, ice can build up under the top layer of your roof and cause water damage once it thaws. Ensuring that your roof is in good condition is vital in preserving your investment, your business and the well-being of your employees.

Whether you need to repair or replace the roof of your commercial building, you will need a professional who has proven themselves and who will know how to do quality work, in line with your requirements, your budget and your time frame. You should also be aware that most insurance companies no longer cover water damage that occurs at a higher level than the ground, so it is all the more important to choose the right contractor to repair or prevent damage.

This is where RenoAssistance comes in. We have already identified and verified the best roofing experts for this type of work, so that you can start your roofing project immediately with a business you can trust.

roof contractors commercial

What are the different roofing options for your building?

It needs to be noted that for your roof you will have several choices between different materials, whether your roof is flat or sloped! Below is a list of different types of roofs with their advantages, disadvantages and their lifespan.

Gravel and bitumen (multi-layer)

For flat roofs, gravel and tar have been the standard for several decades. However, today there exists other solutions that are beginning to take its place as the preferred choice.

  • Advantages: Classic and popular solution. Contractors don't need to have more specific permits, such as with elastomeric membrane, to install it.
  • Disadvantages: This type of roofing requires more maintenance since, over time, the gravel extends all over your roof and it's important to redistribute it as evenly as possible to preserve the protective effect of the mixture. If this maintenance is not done, the life expectancy of the roof will be diminished.
  • Lifetime:15 to 30 years

tar and gravel roof

Elastomeric membrane

As the successor to gravel and bitumen, the elastomeric membrane is gradually becoming the most popular solution for flat roofs. It's essentially a big roll that contractors melt on your roof so that the materials stick to it, providing effective insulation against the water. Its installation can be dangerous so it requires experts who have a special permit to operate the torch directly on your roof to avoid any risk of fire. Therefore, it is necessary to entrust the work to experienced professionals to ensure the integrity of your roof and the building in general.

  • Advantages: Simple solution with a clean finish, solid material that is resistant to temperature extremes and impact and does not require special maintenance.
  • Disadvantages: Just like gravel and bitumen, it is not a green solution and being black, it attracts heat. (However it is possible to get the material in white which costs a costs a bit more, but the costs you potentially saving on air conditioning may be worth the investment since the white attracts less the rays of the sun and thus reduces the temperature of your building)
  • Lifetime: 25 to 35 years

elastomer roof


Also in flat roofs, TPO and EPDM are environmentally friendly solutions that reduce the cost of air conditioning, since the white colour reflects the suns rays, in turn reducing the absorption of heat and keeping your building cooler.

  • Advantages: A better solution for the environment than the multi-layer and elastomeric membrane and also saves you energy costs on air conditioning. It's price is also a little lower than the multi-layer and the elastomeric membrane.
  • Disadvantages: This material tends to be less resistant than others and can tear if a sharp object comes into contact with the surface. It's important to clean it once a year of anything that may have accumulated on its surface to ensure preservation.
  • Lifetime: 25 to 30 years or more (if properly maintained)

tpo epdm roof


The most common material for sloped roofs, the shingle offers a simple, efficient and, above all, cheap solution!

  • Advantages: Low cost, with no special maintenance and the possibility of customization with several colours.
  • Disadvantages: Average life is half that of quality sheet metal.
  • Lifetime: 20 to 25 years

shingle roof

Sheet metal

For sloping roofs, a second popular solution is available to you. This is the sheet metal roof. Care must be taken here since there are several types of sheet metal. In this case we are talking about quality sheet that is made for durable and tough roofing, not lightweight and foldable sheet metal.

  • Advantages: Better resistance than shingles, more sophisticated look, increased strength in terms of resistance to impacts or wear and tear, and a lifetime that is twice as long as shingles.
  • Disadvantages: More expensive than shingles.
  • Lifetime: 50+ years

metal roof

Green roof

Vegetation roofing can be a very attractive investment for your building. Aesthetically, plant life vibrantly breaks up the monotony of urban buildings and can even serve a more functional purpose with the inclusion of a terrace to overlook your neighbourhood and enjoy the weather. It's also a good way to insulate and protect your building from extreme temperatures and the sun's rays. This type of roof provides you with an extra living space that you did not have access to before. What better place for your employees to enjoy their lunch break?

  • Advantages: Allows you to create a terrace, a garden and other living space on your roof. In addition, reduces the effect of hot sun rays on your building in summer and insulates against the cold in winter. This type of roof will help reduce air conditioning and heating costs during summer and winter.
  • Disadvantages: Requires a lot of maintenance and has a very high cost compared to other roofing solutions.
  • Lifetime: Depending on maintenance, can last 50 years.

building green roof

When should you change your building's roof?

The renovation of roofing is not to be taken lightly. Pushing back its replacement could cause you much greater costs if ever the materials found under the roof are damaged in any way. There are various symptoms that can indicate it may be time to replace your roof:

  • The materials that protect the roof are old and appear to be damaged in some places
  • Water infiltration in the attic has occurred at the flashings
  • Due to insufficient support from the framing, the roof structure is falling in at one or more places
  • Frame damage due to excess snow and ice on the roof surface during the winter
  • High moisture content in the attic

tar and gravel commercial roof

Let us get you the right price for your roof replacement

The choice of roofing materials on the market may seem broad, making price comparisons difficult. Take a look at some of the questions you should to ask yourself to ensure a good roofing job:

  • For a sloped roof, should you choose shingles or a metal roof?
  • For a flat roof, should you choose a multi-layered roof (also known as tar and gravel roof), modified bitumen, an elastomeric membrane, or TPO or EPDM?
  • In your situation, is the best guarantee 15, 25, 30 years or more?
  • For a new construction, should you choose a flat, inclined or green roof?
  • Will you need de-icing cables? Will you need to buy windshields and snow shields?
  • What type of ventilation will you require? How much will you need?
  • Do you need flashing (weather protection)?

Therefore, it is important to consult an expert who can guide you and ensure that you don't risk working with a dishonest contractor who inflates your bill. Our renovation advisors can help you find up to 3 contractors to compete on your commercial roofing project, all for FREE!

Talk to a renovation advisor now! 1-888-670-9742

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