You can find several buildings or homes with flat roofing in Calgary. Yet, what is it about that’s made it so commonplace? Where and when did this type of roof become popular? Learn everything you need to know about the origins of flat roofs here. 

Why Flat Roofing in Calgary Exists Today

Origins of Flat Roofs

For the most part, some of the first homes and buildings were constructed with flat roofs. Flat roofs were typically found in dry climates, where infrequent rainfall and freezing temperatures were a rarity or non-existent. So, it was no wonder how flat roofs were common in places like the American southwest and the Middle East since the climates matched those ideal conditions. However, you can get a good idea of how far back they date based on flat roofs characteristic of the Egyptian, Persian, and Arabian styles of architecture.

Factors Towards Building Upon Flat Roofs 

The early foundations of flat roofs used easily accessible materials such as leaves, straws, and branches. Creating a flat roof involved using those materials and pressing them into clay to fill the empty spaces and create a solid barrier for the top of homes and buildings. However, due to the limitations of materials used, a flat roof’s biggest flaw at the time was needing a basic drainage system. 

Despite this flaw, it inspired the need to innovate on flat roofs in various ways—these range from using more durable, suitable materials for certain climates and structuring flat roofs differently. For instance, places experiencing snow benefit from a sloped roof to avoid leaks from seeping inside. Over time, these factors help facilitate the evolution of the flat roof, eventually leading it to become a staple type of roofing across the globe. 

Foundation of Modern Flat Roofs

In 19th century America and Europe, modern flat roofs found popularity. By this time, better waterproof materials, like concrete and steel, were readily available. Various metals such as lead, tin, copper, and asphalt were deemed the most effective since they were durable for many years. 

Once the late 1950s and 1960s rolled in, a notable material called mineral felt – bituminous felt roofing sheet – became popular since it was lightweight and affordable. However, its drawback was it’s prone to leaks. Thankfully, the issue was short-lived from using better materials like TPO, PVC and EPDM rubber roofing.

EPDM has been one of the most popular materials since the late 1970s and remains as such until this day. It makes sense since this material is cost-effective, with the lowest cost per square foot. TPO, or thermoplastic polyolefin, is another common material that modern flat roofs can use. Like EPDM, it’s also very durable and heat resistant since it is made of a vinyl composite. However, it’s a tad better since it offers a higher degree of UV protection and structural integrity, allowing it to support more weight.

With these new materials, modern flat roofing in Calgary wouldn’t have existed without innovations making it possible. 

City Roofing & Exteriors consistently takes pride in serving Calgarians. At City Roofing, we understand the importance of customer satisfaction. We put safety, quality work and on time delivery as our top priority. We work hard to assist our customers in providing proper roofing systems to meet their budget and needs. We offer completed roofing services in Calgary and area on both residential and commercial projects. We guarantee that you will be satisfied with our work and recommend City Roofing as your roofing consultant and contractor. Give us a call at 403-608-9933 or send an email to [email protected]

Winter ushers in a sudden drop in temperatures that don’t go unnoticed by everyone in the city. Naturally, the shift to colder conditions has many homeowners planning to find ways to make their homes warmer. One such method is by finding parts of the house to insulate. However, for those with flat roofing in Calgary, it has them wondering whether it’s possible to insulate. Find the answer here if you have been pondering whether it’s possible.

Insulation For Flat Roofing in Calgary 

How Insulation For a Flat Roof Works

For those with flat roofing, insulating is possible! Yet, when it comes to installing insulation, there are various ways of going about it. For instance, you can install insulation from the inside or the outside. 

Here are a few of the following methods to consider:

Inside Insulation

Many roofing companies in Calgary may refer to inside insulation as a hot roof. What exactly does this mean? For the most part, hot roofs are where the insulation is attached to the floor decking and rafters. In turn, it helps create thermal protection. However, this form of insulation has its limitations. If your ceiling height is limited, the insulation will reduce not only the room’s height but may impede doors and windows opening too. It’s why these are mainly common for pitched roofs.  

Outside Insulation

Regarding outside insulation, it’s also commonly referred to as a cold roof. Typically, this type of installation involves proper ventilation through the layer of insulation, waterproofing, and the rest of the roof. The process is done by applying a strong adhesive to the foam board, laying it down on the roof surface, and securing it with washer head nails. After, the rubber waterproof membrane adheres to the surface of the foam board. More layers of foam board are normally used in this application to achieve the needed R-value. Yet, for this method, be mindful of insulating rim joists – without doing so can create moisture and air infiltration issues.

Materials Used for Flat Roof Insulation

Beyond choosing to insulate inside or outside, you must also discern what materials to use. It’s important to understand what materials there are to know which would work better than others. Check out the following insulating materials down below:

  • Polyisocyanurate: It’s the most popular flat roof insulation option – and for a good reason. This material achieves a high R-value even with minimal thickness as closed-cell foam. Its thinness is great for working on a flat roof with little space. 
  • Expanded Polystyrene: Just installed a flat roof? If so, this material is best. However, avoid this for existing flat roofs since it works by expanding into crevices. It must be dealt with much care to avoid cutting off ventilation. 
  • Extruded Polystyrene: This material may not have high performance. However, if you’re looking for an easy installation for an existing roof, this is for you. 

The Benefits of An Insulated Flat Roof

For any Calgarian, the common reason to consider insulating their flat roof is to stay warm during the cold winter months. Yet, an insulated flat roof brings plenty of other benefits. 

Check out a few of the benefits here:

  • Stays cooler during hot summer weather
  • Reduced carbon emissions
  • Less energy consumption
  • Lower heating bills
  • Improved energy rating

City Roofing & Exteriors consistently takes pride in serving Calgarians. At City Roofing, we understand the importance of customer satisfaction. We put safety, quality work and on time delivery as our top priority. We work hard to assist our customers in providing proper roofing systems to meet their budget and needs. We offer completed roofing services in Calgary and area on both residential and commercial projects. We guarantee that you will be satisfied with our work and recommend City Roofing as your roofing consultant and contractor. Give us a call at 403-608-9933 or send an email to [email protected]

If you own a home with a flat roof, you’re most likely aware of how common leaks are for these types of roofs and how hard it can be to prevent them. Luckily, there are plenty of options for materials for flat roofing in Calgary, and if you know which ones work best in your area, you can greatly reduce the chances that your flat roof will leak in the future. Here are some of the most popular materials for flat roofing materials on the market today.

Types of Materials for Flat Roofing in Calgary

EPDM Membrane Roofing 

This variant of rubber roofing is among the most popular today due to its durability, reliability, and affordability. EPDM roofing is also resistant to water damage and abrasion, making it a great option for flat roofs when your home is susceptible to frequent rainfall. EPDM roofing is also easy to clean and can last 15-25 years if properly installed. The only downside is that it can become brittle in cold temperatures. The best way to deal with this is to store your flat roof supplies in a warm place, such as your garage, once the temperature drops.

TPO Membrane Roofing

This version is closely related to EPDM roofing, with several of the same benefits. Many people consider them the same. However, EPDM roofing is a type of TPO roofing. While most people are familiar with TPO membrane as far as flat roofs go, only some know about its sister product – TPO roofing. You can think of them as the same thing, and in some cases, you may use EPDM roofing on your flat roof. In other instances, you may use a thicker version of TPO for your flat roof, known as TPO membrane or TPO rubber.

PVC Membrane Roofing

PVC membrane is most commonly found in flat roofs installed, but there is a good reason for that. The material is generally more durable than the EPDM membrane since it’s inexpensive and easier to install. However, it has no special qualities of EPDM or TPO membranes. The downside is that it’s harder to clean than other types of flat roofing, so you may choose this type only if you have no other option.

Standing Seam Metal Roof

Lastly, you have standing seam metal roofs. The material is more durable than EPDM, withstanding years of use in these regions. It is less expensive than EPDM, but it has the same problems as other metal flat roofs – it isn’t very easy to clean and requires significant maintenance.

There are several flat roofing options today, each with its benefits and drawbacks. However, it’s important to note that not all materials are created equal. PVC membrane roofing is the most popular choice among flat roofers today, as it is fairly durable and affordable. If you’re in a similar situation to the one described above, this is the type of flat roof you should buy for your home.

City Roofing & Exteriors consistently takes pride in serving Calgarians. At City Roofing, we understand the importance of customer satisfaction. We put safety, quality work and on time delivery as our top priority. We work hard to assist our customers in providing proper roofing systems to meet their budget and needs. We offer completed roofing services in Calgary and area on both residential and commercial projects. We guarantee that you will be satisfied with our work and recommend City Roofing as your roofing consultant and contractor. Give us a call at 403-608-9933 or send an email to [email protected]

Roofing is the most important aspect of your property because you must carefully choose a durable, long-lasting and affordable roof. There are various roofing options available, but you should find flat roofing in Calgary as it offers many benefits regardless of the kind of your property. Before you decide to install a flat roof on your property, you will need to know the pros and cons of this roof. Even though this kind of roof is less popular than the other roofing options, you need to be aware of some misconceptions the property owners have regarding this roofing system

In times of heavy rainfall, you should consider something other than this roof. But overall, a flat roofing system is one of the most valuable investments you can make for your property. There might be some false myths about this roof as it is one of the most attractive and durable roofing systems. It would help if you debunked these myths while considering installing a flat roof at your commercial or residential property so that you can get the desired results from the roof installation project. Flat roof installation offers an excellent opportunity for property owners to consider this option for enjoying its benefits over a long time. 

Common Misconceptions of Flat Roofing in Calgary 

Flat Roofs Tends to Leak & Accumulate Water

It is one of the most common myths that you get to hear from people when you decide to install a flat roof on your property. The notion that a flat roof will accumulate water is false because these roofs are not perfectly flat, which means water will flow down the slope. There is a slight pitch on the roof. That means that water will not gather on the roof, and the risks of any leakage are also eliminated. Flat roofs are installed with proper drainage, so your roofing system is not susceptible to leaks. 

You Can’t Insulate Flat Roofs

Flat roofs are constructed to offer extra protection and an extra layer of insulation on your property. Even though installing a flat roof is trickier than the other sloped roof style, you can easily insulate the roof for amazing results all year round. Hence, there is no need to worry about changing weather conditions or extreme temperatures when you have a flat roof. Summer or winter will not impact the people living or working inside the property because the flat roofing system offers excellent insulation in all kinds of weather.

Maintenance Costs of Flat Roofs Are Very High

This myth about a flat roof is debunked because each kind of roof needs to be maintained regularly. The roof maintenance costs depend on the kind of roofers you hire, and it does not directly relate to the type of roof you have on your property. The maintenance of flat roofs is not costly, disruptive or complicated, which means you can enjoy using such a roof for many years without any hassles. 

City Roofing & Exteriors consistently takes pride in serving Calgarians. At City Roofing, we understand the importance of customer satisfaction. We put safety, quality work and on time delivery as our top priority. We work hard to assist our customers in providing proper roofing systems to meet their budget and needs. We offer completed roofing services in Calgary and area on both residential and commercial projects. We guarantee that you will be satisfied with our work and recommend City Roofing as your roofing consultant and contractor. Give us a call at 403-608-9933 or send an email to [email protected]

With the end of summer, the seasonal shift ushers the start of autumn. There is nothing like seeing the city’s greenery transform into various red, yellow, and orange colours during this time. As beautiful as this time might be, its changes can leave anyone with flat roofing in Calgary susceptible to possible issues. See why it’s necessary to protect your flat roof this fall, so you can avoid potential problems from occurring! 

Protection for Flat Roofing in Calgary this Fall

Keep Things Spotless

Seeing the leaves change colours isn’t the only thing that occurs – the leaves fall from trees too, hence, why autumn is also known as fall. If you wait too long, those with flat roofing in Calgary will potentially find heaps of leaves have been collected. Cleaning your flat roof is particularly important for those with nearby trees close by their house. 

A bunch of leaves together might seem harmless, but they can bring in moisture damage. How so? Well, many forget that leaves are organic matter. Their makeup is naturally made with lots of water – approximately 95%-98%. Water seeping into your flat roof can create a breeding ground for mold and fungus. In turn, this leads to deterioration that can severely reduce the lifespan of your flat roof. 

That’s why cleaning your flat roof and surrounding area, such as the gutters and outlets, is important so they can catch water and prevent water damage. With how storms can be in Calgary, check your flat roof for branches and debris as soon as possible to avoid such issues. 

Spotting Possible Repairs

As you finish cleaning your flat roof, it’s also the perfect time to spot any possible repairs. Once you have a clear view, you can check for any signs of repairs. 

For instance, you may see splitting or cracks on your flat roof. This issue, in particular, can arise during the fall when the temperature begins to drop, which can cause unwanted pools of water to freeze and thaw during warmer or colder fall days. These fluctuations in temperature can lead to leaks that can get inside your home and create more damage in its wake. 

You will want to address any leaks as soon as possible. Winter is just one season away from fall, where more problems can occur when the temperature drops even further. Calgary winters can become harsh – and you don’t want the cold creeping inside because you failed to get repairs done. Therefore, it would be in your best interest to get repairs to restore its structure and ensure it doesn’t lead to even worse repairs in the future. 

Many might not think about maintenance and repairs when it comes to their flat roof during the fall. However, it’s probably the best time to check. It’s better to ensure your flat roof is structurally sound by properly protecting your home from the outside elements. The least you can do is provide it with some maintenance and possible repairs. 

City Roofing & Exteriors consistently takes pride in serving Calgarians. At City Roofing, we understand the importance of customer satisfaction. We put safety, quality work and on time delivery as our top priority. We work hard to assist our customers in providing proper roofing systems to meet their budget and needs. We offer completed roofing services in Calgary and area on both residential and commercial projects. We guarantee that you will be satisfied with our work and recommend City Roofing as your roofing consultant and contractor. Give us a call at 403-608-9933 or send an email to [email protected]

The construction of flat roofing in Calgary is not limited to one type. On the contrary, homeowners can choose a few options based on the material. Like all materials, these flat roofing materials come with advantages and drawbacks. Learn what these flat roof systems offer and see which one best suits your needs. 

The Available Types of Flat Roofing in Calgary 

Rubber Membrane Roof (EPDM)

A rubber membrane roof (EPDM) is a popular material for many with flat roofing in Calgary. Based on its makeup, many gravitate toward it for plenty of good reasons. 

Firstly, its rubber material is great for durability. Are you worried about damage from sunlight? EPDM has you covered with that, along with so much more. In Calgary, the weather can be all over the place – no matter what season. EPDM makes a good choice for material since it is waterproof and can handle whatever temperature and weather conditions.

Along with that, its durability contributes to having a long lifespan – approximately last for 40-50 years without needing much maintenance. Not only that, but EPDM provides various colours you can put on your flat roof. However, the downside to having such options is that it will cost you more. EPDM is a bit pricier than the other materials soon to be covered. 

Built-Up Roof (BUR)

Another common flat roof material would be a Built-Up Roof (BUR). BUR is your typical hot-tar-and-gravel roof built from three or more plies of waterproof material. Its unique composition from multiple layers of different materials includes reinforced bitumen and fabric before putting a final stone or gravel layer on top. 

From how many materials are put together, BUR is more durable and has a longer lifespan – which can last around 60 years! However, BUR doesn’t mean it’s not without its drawbacks. If the colour of your flat roof is important, you will find yourself limited in options. Also, the layer in BUR with stone or gravel can prove to be an issue during particularly high winds. 

Speaking of the material, since there is so much, the cost of BUR can be quite expensive. 

Modified Bitumen Roof (MBR)

Consider this flat roof material BUR’s cousin as they share similarities but have key distinctions that set them apart. A Modified Bitumen Roof (MBR) is a system that’s asphalt-based with a five-layer combination of roofing components. These include materials such as co-polymer reinforced with polyester or fibreglass. 

From such a composition, they provide plenty of benefits. From the asphalt, it helps create thermal resistance that helps keep your roof’s temperature regulated. In turn, it can help reduce the costs of your energy bill. Furthermore, it is fairly durable since it does provide good weather resistance as it’s a waterproofing material. 

However, the issue with MBR is its torch-down application, which can pose a fire hazard. Also, there are limits to its durability since it’s not as scuff- or tear-resistant as rubber-membrane roofs. This material has a good balance of pros and cons, so it’s why the price of these isn’t too high nor too cheap. 

City Roofing & Exteriors consistently takes pride in serving Calgarians. At City Roofing, we understand the importance of customer satisfaction. We put safety, quality work and on-time delivery as our top priority. We work hard to assist our customers in providing proper roofing systems to meet their budgets and needs. We offer completed roofing services in Calgary and areas on both residential and commercial projects. We guarantee that you will be satisfied with our work and recommend City Roofing as your roofing consultant and contractor. Give us a call at 403-608-9933 or send an email to [email protected]

The summertime heat remains relentless well into August. Many homes with flat roofing in Calgary get the brunt of the sun’s harsh UV rays. In turn, this can create potential issues if you don’t find a way to cool it down.

See how you can cool down your flat roof here! 

How Heat Affects Your Flat Roof

Flat roofs are overall great to have. In some cases, you can even potentially turn it into a rooftop deck for you to relax and enjoy. However, there is perhaps one drawback to a flat roof is its tendency to trap heat.  

How does this occur? From thermal expansion. On cloudy or cooler evenings, you can expect your home to be on the colder side. However, the opposite occurs when it comes to hot sunny days. When your flat roof absorbs the sun’s heat, it ends up expanding. Normally, this isn’t a big issue for some flat roofs, but there is a possibility it can cause problems. 

For instance, some sections of your roof expand even when there isn’t enough space. In turn, it causes materials to push themselves out along the seams. As a result, it can create gaps that leave your roof vulnerable to water seeping inside. 

Potential water damage is a serious issue. It can not only get expensive for repairs but can weaken your roof’s strength and invite mold. Even if you might not be paying the cost of damages, you could be paying more for energy because of the heat from your roof. 

Man applies waterproof and thermal insulation of a roof from rain and sun.

Ways to Keep Your Flat Roof Cool

Thankfully, there are ways you can help cool down your flat roof. 

Here are a few ways you can keep your roof cool:

Roofing Coatings

The goal in mind to help reduce heat is by using materials that can help to reflect a majority of solar heat. You can find plenty of materials that do just that, which include the following:

  • Elastomeric paint
  • Large polyvinyl chloride (PVC) sheets with heat-sealed seams
  • Asbestos film shield
  • A thin layer of solar panels

Foam Insulation 

Another good solution would be to install a layer of solid foam insulation directly under your flat roof. Insulation is meant to help create barriers to the transmission of heat and moisture. In turn, you can expect it to ward off intense heat from coming into your home this summer. Plus, you will thank yourself for adding insulation as it helps to improve your energy efficiency and ultimately reduces your utility bills! 

Windcatchers

Lastly, you can consider using windcatchers. If you’re not familiar with them, windcatchers have been around for centuries in places with hot climates. They’re usually shaped like a dome with vertical weather vanes that rotate at the slightest breeze. From this, it helps to direct cool air downwards into your home. Plus, you don’t have to worry about its installation affecting the temperature in your home when it gets cold. Windcatchers are equipped with a vent seal to keep cold air out. 

City Roofing & Exteriors consistently takes pride in serving Calgarians. At City Roofing, we understand the importance of customer satisfaction. We put safety, quality work and on time delivery as our top priority. We work hard to assist our customers in providing proper roofing systems to meet their budget and needs. We offer completed roofing services in Calgary and area on both residential and commercial projects. We guarantee that you will be satisfied with our work and recommend City Roofing as your roofing consultant and contractor. Give us a call at 403-608-9933 or send an email to [email protected]

There is nothing like basking in the summertime sunshine. Having a place to let yourself soak up the rays and relax with others would be great. Thankfully, it is possible to create such an oasis from home – specifically at the top of it! 

Those with flat roofing in Calgary can easily transform it into a rooftop deck. Yet, what exactly is it? What does it entail? Learn more about flat roof decking and whether it might be a great home addition to have this summer!  

Looking into Flat Roof Decking in Calgary

Understanding Flat Roof Decking

Have you ever been to areas around the city where their rooftops are turned into a certain space? For example, restaurants with patios at the top of their roof. If so, that’s a result of the flat roof decking. 

Flat roof decking isn’t limited to public spaces’ rooftops – some homes can have them too!

You see flat roof decking commonly at penthouses since they’re typically connected to the rooftop. However, houses can have them as well if they have a flat roof. From flat roof decking, it constructs an outdoor space into whatever the person wishes it to be.

Naturally, when flat roof decking is done, it’s finished off with fencing for safety reasons.

The Benefits of Flat Roof Decking

Flat roof decking comes with various benefits. Namely, one of the biggest is how you can transform the rooftop to suit you. 

Do you like entertaining and socialising with friends but don’t have patio space down below? Instead, turn your rooftop into a patio! Many friends and family will love the novelty of its location. Plus, you can bet that it can provide you and everyone with outstanding views. And with summertime celebrations, you can bet you will get a clear view of fireworks that erupt into the sky!

If you happen to have more of a green thumb, you can easily turn your rooftop into a garden paradise. There is enough room that you can grow various plants and vegetables without worrying if they’re getting enough sun or not. It gives them all the sun exposure they need to thrive. 

Beyond turning the rooftop space to your liking, there are other benefits such as:

  • Fire resistance with high-quality thermal performance. 
  • Provides your roofing system sound & structural support.
  • Creates a slope for improved wind-uplift performance & a slope for drainage.
  • Increase the value of your home by giving personality. 

What to Consider for Flat Roof Decking

Before you install flat roof decking, there are a few considerations you need to be mindful of before reaching out for a quote on the project. 

  • Ensuring your flat roof is strong enough to support a deck. 
  • Getting a permit.
  • What materials & colours to use.
  • Think about how the weather will impact it.
  • Find protection for thermal contraction & expansion.
  • Ensure water resistance to avoid leaks. 

If you’re uncertain whether flat roof decking is possible, you can always reach out for help from flat roofing companies in Calgary to find out and get a potential quote. 

City Roofing & Exteriors consistently takes pride in serving Calgarians. At City Roofing, we understand the importance of customer satisfaction. We put safety, quality work and on time delivery as our top priority. We work hard to assist our customers in providing proper roofing systems to meet their budget and needs. We offer completed roofing services in Calgary and area on both residential and commercial projects. We guarantee that you will be satisfied with our work and recommend City Roofing as your roofing consultant and contractor. Give us a call at 403-608-9933 or send an email to [email protected]

Your commercial property is an investment, so it’s only right that you want to take the necessary steps to protect it. By maintaining your roofing system, you can feel confident that severe weather or pesky critters won’t find their way inside, ensuring your property’s security and structural integrity.

Therefore, when it comes time to replace your flat roofing in Calgary, it makes sense that you would want the best materials available. But is there a true standout when it comes to flat roofing materials? Let’s explore your options below.

The Pros and Cons of Flat Roofing Materials

Built-Up Roof (BUR)

This is your traditional hot-tar-and-gravel roofing option. With three, if not more, layers of waterproof membrane alternating with hot tar, you’re sure to have a reliable, leak-proof roof. 

This type of flat roofing is attractive, fire-retardant, and relatively inexpensive. The main drawback to this style is the installation process: it’s smelly, heavy, and requires a true pro to ensure a proper finish.

Modified Bitumen Roof

This single-ply roofing material is infused with a mineral-based wear surface. It comes in a roll, and as you unroll it, a torch is used to heat and adhere the material to the surface of the roof. That said, there are peel-and-stick options available now, which can be safer to install.

This type of flat roofing can be perfect for those looking to save money in the long run, as its light-coloured mineral surface is able to reflect heat and cut down those energy bills. However, the installation process does present a fire risk, and it’s not as scuff-resistant as other options.

Rubber Membrane Roof

This material may resemble an inner tube, but its durability and resistance to damage and sunlight prove it’s here to stay! Rubber roofs can be anchored with fasteners, glue, or ballasted with stone.

This material is fairly light, yet can still hold up against scuffs and tears. Additionally, if leaks ever form, they are relatively simple to patch. The main downside to this option is the cost; the standard black material absorbs heat, thus increasing your energy bill, while the lighter-coloured options generally cost more, thus impacting the price of your roof replacement.

Final Verdict

Ultimately, there is no one material that can be described as being the best. Take your time to research your options and connect with a contractor to determine which flat roofing material would make the most sense for your property.

At City Roofing and Exteriors, we take pride in our work and by serving Calgarians. We work hard to assist our customers in providing proper roofing systems to meet your budget and needs. We guarantee that you will be satisfied with our work. Give us a call at (403) 608-9933 or email us at [email protected].

When you begin to notice unexplained cases of mould, water stains, condensation, or even leaks, you know it’s time to replace your flat roof. While the varying types of flat roofs may be similar in appearance, they each have their own pros and cons.

Let’s take a look at some of the types of flat roofs available to you and how they can work to protect your property.

3 Types of Flat Roofs

  1. Built-up Roof (BUR)

This is the traditional hot tar and gravel roof that is comprised of three (sometimes more) plies of waterproof material, which alternate with hot tar. While they once used tar paper, it’s more common to find roofing companies using more advanced materials, such as fibreglass membranes.

The most attractive fact about this particular flat roof is that it is generally the least expensive option. Gravel is also fire-resistant, which is an added bonus.

On the other hand, this is a rather heavy material that is smelly and messy to install. Therefore, it’s recommended a professional is hired to install the roof and that the building not be occupied during the installation.

  1. Modified Bitumen Roof

This is a single-ply roof that has a mineral-based surface. During installation, modified bitumen roofing is rolled out and then heated with a torch to ensure proper adhesion. However, there are peel-and-stick options coming out as well, which can be safer to work with.

Worker preparing part of bitumen roofing felt roll for melting by gas heater torch flame. On the back of the sheath there is the stamp "Made in Italy" product

This type of roof is moderately priced, but more expensive than BUR. However, the mineral surface creates a lighter colour, thus reflecting the sun and reducing energy bills. Therefore, you may find yourself making back some of that initial investment through savings.

  1. Rubber Membrane Roof 

This is another single-ply material that tends to resemble the feel of an inner tube. Rubber membrane roofing can be anchored with either fasteners, glue, or stone.

This type of roofing is easy enough to install that property owners could do it themselves if they so wished. The material is highly resistant to scuffs and tears, and any leaks that may appear in this roofing are easy to patch. 

It is, however, the most expensive option and more susceptible to punctures.

If you’re considering flat roofing in Calgary but are unsure of where to start, don’t hesitate to reach out to a professional roofing company. With their years of experience, they’ll be able to advise you on which flat roof makes the most sense for your property.


At City Roofing and Exteriors, we take pride in our work and by serving Calgarians. We work hard to assist our customers in providing proper roofing systems to meet your budget and needs. We guarantee that you will be satisfied with our work. Give us a call at (403) 608-9933 or email us at [email protected].

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