Most property owners reconsider replacing a roof with minimal damage. Unfortunately, roof wear and tear show little visible signs. So, there’s another question Toronto ON property owners need to answer: when does a roof need to be replaced?”

After reading this post, you’ll know more about:

•          How often should roof be replaced?

•          The common lifespan of different commercial roofing materials

•          Different factors that age and wear roof performance and lifespan

•          Whether to go with repairs or full roof replacements

How Often Should Roof Be Replaced?

The average roof lifespan is about 15-50 years regardless of material. Toronto ON has a humid continental climate. Therefore, it has mild summers and extremely cold winters.

The consistent temperature helps mid-range commercial roof materials such as rubber roofs to go beyond its manufacturer lifespan estimates. The consistent temperature may add 3-5 years to roofing lifespan, but always consider this a “grace period” for replacing your roof.

Furthermore, it answers “how long does a 30 year roof really last.” Property owners should consider replacing their roof within the last 3-5 years of the lifespan of their roof.

The Lifespan of Common Commercial Roofing Materials

The best way to answer “how often should roof be replaced” is to know the average lifespan of common commercial-use roofs.

In this section, we list each trait and average lifespan of each roofing material.


Rubber roofs with slate and sawdust reinforcing can last for 20-30 years. In the weather of Ontario, EPDM roofs can last for 35 years. True enough, EPDM is capable of withstanding several hailstorms despite being the most affordable commercial roofing material avaialble.


The successor of rubber roofs has an extended lifespan of 35-40 years. Therefore, the consistent cool temperature in Ontario gives it about 43-45 years before expiring. How often should roof be replaced if you’re using TPO? It is possible you’ll only replace the entire roof once within a human lifepan.


The strongest of all single-ply membrane roofs can last for 40-50 years. True enough, it can go toe-on-toe with metal roofing materials.  Furthermore, it can carry heavy HVAC and other equipment with its 300 pounds-per-inch (PPI) strength. Therefore, how often should roof be replaced when using PVC roofs? Perhaps never or just once.

Related: The Best Flat Roofing Material for Commercial Properties

HVAC units on top of a PVC roof
PVC roofs have a strength of 300 PPI allowing them to carry numerous heavy equipment such as HVAC units.

Modified Bitumen

The modernized version of tar and gravel roofs has a shorter lifespan of 25-30 years than its predecessor. However, you can compare its lifespan to an adequate residential asphalt shingle roof.

Modified bitumen replaces tar with asphalt as a sandwiching material between waterproofing layers. However, the material exchanges the durability and lifespan of tar with asphalt leading to a shorter lifespan.

Felt Roofing

We do not consider felt roofing a long-term roofing solution because you’ll replace them frequently. How often should roof be replaced using felt roofing? Every 15-20 years.

However, roofers can install all felt roof squares of a commercial roof within a week. Therefore, use felt roofing when you want the quickest commercial roof installation possible.

roofing contractor installing felt roofing
Felt roofing is the fastest to install. However, it has a relatively short lifespan compared to other roofing materials.

Mastic Asphalt

This limestone and concrete-reinforced asphalt slab has a formidable lifespan of 50-70 years. In the weather of Ontario, it can last beyond 70 years on average. Therefore, hotels and high foot traffic-roofed properties use mastic asphalt. However, its price is quite expensive.

Concrete Slab/Tiles

Concrete slab and tile roofs have an average lifespan of 50-60 years. These commercial roofs have solid resistance against hailstorms and heavy foot traffic. However, they’re laborious and expensive to install.

commercial property with concrete roof
Concrete roofs can last for 50-60 years making them a formidable commercial roofing investment.

Metal Roofs

Properties with minimal roof foot traffic yet need a long-lasting roof that provides excellent protection against hailstorms should use metal roofs. On average, a metal roof lasts 50-70 years with a particularly quick installation process.

Weather and Environmental Factors in Toronto ON

Ontario has a humid continental climate that guarantees virtually consistent cold temperature. Therefore, most roofs endure less temperature fluctuations that help prolong the roof material lifespan. Furthermore, these other factors can shorten or lengthen the lifespan of roofing materials.

Roof Age

The list above lists all the average lifespan of commercial roofing materials. However, we advise that property owners consider replacing their roofs within the last 3-5 years of their roof age. This is the most important of all things to consider when replacing a roof.


Most Ontario property owners will find temperature to have minimal effect on the lifespan of their roof. The consistent cool weather in the region helps prolong the lifespan of roofing materials.


Property owners strive for excellent insulation to minimize utility costs. However, they will need exhausts to let indoor temperature escape. In turn, it “relaxes” the roofing material from internal air pressure. Therefore, roof materials remain under pressure without good ventilation.

Roof Repairs or Replacement?

Does my roof need replacing or do I just need to give it repairs? Hiring a professional roofing contractor is the best way to answer this question.

Ontario property owners are fortunate because most contractors offer free-of-charge roofing inspections. Therefore, having one do a regular inspection gives you a heads-up view of the health and lifespan of your roof.

However, you can do a quick inspection yourself. If your roof has decades of lifespan left, then you won’t need to replace it. Have a contractor inspect your roof to see the full extent of damages.

If the hailstorm damage proves detrimental, then contractors will likely recommend a replacement. If you have hail damage insurance, then you won’t have too much financial issues with replacements.

Furthermore, if you haven’t found a trusty contractor, we’d like to present the services of Skyluxe Roofing and Sheet Metal. With more than 20 years of experience with commercial roofing, we are confident in providing only the best repairs and replacement services for your roof. Call us today for a comprehensive roofing inspection FREE of charge!