Flat roofs are a popular choice for commercial and industrial buildings, especially in urban areas like Toronto and the Greater Toronto Area (GTA). While these roofs offer various advantages, one of the most common features you’ll notice is the layer of gravel spread across the surface. But why is this gravel so essential? In this blog, we’ll delve deep into the reasons behind the use of gravel on flat roofs, explore how commercial and industrial flat roofing is done, and discuss why these types of buildings often opt for flat roofs. We’ll also provide a comprehensive guide to the benefits and challenges of gravel roofing, ensuring that by the end of this article, you’ll have a thorough understanding of the subject.
The Process of Commercial and Industrial Flat Roofing
How Commercial and Industrial Flat Roofing is Constructed
Commercial and industrial flat roofs are constructed with durability and functionality in mind. The process begins with the installation of a sturdy foundation layer, usually made from a combination of rigid insulation and a vapor barrier. This base layer is crucial as it provides thermal insulation and prevents moisture from penetrating the building.
Once the base is in place, multiple layers of roofing material are added. In many cases, these layers consist of roofing felt or fiberglass, which are alternated with hot asphalt or bitumen. This creates what is known as a Built-Up Roof (BUR), a tried-and-true method that has been used for decades. The number of layers can vary depending on the specific needs of the building and the climate conditions it faces. More layers generally mean a more durable and long-lasting roof.
Why Commercial and Industrial Buildings Opt for Flat Roofs
Flat roofs are a common sight on commercial and industrial buildings for several reasons. First and foremost, they are cost-effective. The materials and labor required for flat roofing are generally less expensive than those needed for pitched roofs. Additionally, flat roofs are easier and quicker to install, which is a significant advantage for large commercial structures where time and budget constraints are critical.
Another reason for the popularity of flat roofs in commercial and industrial settings is their functionality. Flat roofs provide extra space that can be used for various purposes. HVAC systems, solar panels, and even rooftop gardens can be installed on flat roofs without significantly impacting the building’s overall design. This is especially important in urban environments where space is at a premium.
Moreover, flat roofs allow for easier access for maintenance and repairs. Unlike steeply pitched roofs, which can be dangerous and challenging to navigate, flat roofs provide a safer, more accessible surface for workers. This is particularly beneficial for large buildings that require regular inspections and upkeep.
The Role of Gravel in Flat Roofing Systems
Why Gravel is Used on Flat Roofs
Gravel plays a crucial role in flat roofing systems, particularly in Built-Up Roofs (BURs). The primary function of gravel is to protect the underlying roofing materials from the elements. The sun’s ultraviolet (UV) rays can be incredibly damaging to the roofing membrane, causing it to crack and deteriorate over time. By covering the membrane with gravel, the roof is shielded from direct sunlight, significantly extending its lifespan.
In addition to UV protection, gravel also helps to weigh down the roofing materials. Flat roofs are often exposed to strong winds, which can lift and damage the membrane if it’s not properly secured. The gravel adds the necessary weight to keep everything in place, reducing the risk of wind-related damage.
The Benefits of Gravel on Flat Roofs
Gravel also contributes to the overall durability of the roof. It provides a protective barrier against physical damage, such as foot traffic or falling debris. On a commercial or industrial building, where maintenance workers or contractors may frequently access the roof, this added layer of protection is invaluable.
Another advantage of gravel is its role in drainage. Although flat roofs are not perfectly level—they usually have a slight slope to allow for water runoff—water can still pool in certain areas. Gravel helps to facilitate drainage by preventing the formation of puddles, which can lead to leaks and other water-related issues.
Finally, gravel improves the fire resistance of the roof. The stones used in roofing gravel are typically non-combustible, providing an additional layer of protection in the event of a fire. This is particularly important in industrial settings where the risk of fire may be higher.
Major Faults and Challenges with Gravel Roofing Systems
Common Issues with Gravel Roofing
Despite their many benefits, gravel roofing systems are not without their challenges. One of the most common issues is the potential for gravel displacement. Over time, wind, rain, and even foot traffic can cause the gravel to shift or accumulate in certain areas. This can leave parts of the roofing membrane exposed, making them vulnerable to damage.
Another issue is the risk of clogged drains. If gravel or other debris gets into the roof’s drainage system, it can cause blockages, leading to water buildup and potential leaks. Regular maintenance is essential to ensure that the gravel remains evenly distributed and that the drains are clear.
The Importance of Maintenance and Repairs
Maintenance is key to the longevity of a gravel roofing system. Regular inspections should be conducted to check for any signs of wear or damage. If areas of the roof are found to be exposed or if the gravel is unevenly distributed, immediate action should be taken to rectify the situation.
Repairs to gravel roofing systems should always be carried out by professionals. While it may be tempting to try and fix minor issues yourself, improper repairs can lead to more significant problems down the line. Professional roofing contractors have the expertise and tools necessary to ensure that repairs are done correctly, preserving the integrity of the roof.
How Gravel Extends the Lifespan of Flat Roofs
The Protective Qualities of Gravel
Gravel extends the lifespan of flat roofs by providing a robust layer of protection against the elements. As mentioned earlier, it shields the underlying roofing membrane from UV rays, which can cause significant damage over time. This protection is especially important in climates with high levels of sun exposure.
In addition to UV protection, gravel also helps to mitigate the effects of temperature fluctuations. The stones absorb heat during the day and release it slowly at night, reducing the stress on the roofing materials caused by rapid temperature changes. This can prevent cracking and other forms of thermal damage, further extending the life of the roof.
Enhancing Roof Durability and Performance
Gravel also contributes to the overall durability of the roof by protecting it from physical damage. On commercial and industrial buildings, where the roof may be subjected to heavy foot traffic or the installation of equipment, the gravel acts as a buffer, reducing the risk of punctures and other damage to the roofing membrane.
Moreover, the weight of the gravel helps to anchor the roofing materials in place. This is particularly important in areas prone to high winds, where unsecured roofing materials can be lifted or displaced, leading to leaks and other issues. By keeping everything in place, gravel ensures that the roof remains intact and functional, even in challenging weather conditions.
The Value of Gravel in Flat Roofing Systems
Gravel is not just a simple addition to flat roofing systems; it’s a critical component that significantly enhances the durability, functionality, and lifespan of your roof. Whether it’s protecting the roof from harsh UV rays, facilitating proper drainage, or preventing physical damage, gravel serves multiple essential roles. For commercial and industrial buildings in Toronto and the GTA, where weather conditions can be unpredictable and often severe, having a well-maintained gravel roofing system is a must. The investment in gravel roofing pays off by reducing long-term maintenance costs, preventing leaks, and ensuring that your building remains safe and secure for years to come.
If you own or manage a commercial or industrial property, ensuring your flat roof is properly maintained should be a top priority. Gravel roofing not only extends the life of your roof but also enhances its overall performance, providing peace of mind that your building is well-protected against the elements.
Why Choose NorthCan Roofing?
When it comes to flat roofing systems, including those with gravel, you need a trusted partner who understands the intricacies of commercial and industrial roofing. NorthCan Roofing is the leading expert in Toronto and the GTA, specializing in the installation, maintenance, and repair of high-quality flat roofing systems. With years of experience and a commitment to excellence, NorthCan Roofing has built a reputation for delivering outstanding results that stand the test of time.
Don’t leave the safety and durability of your building to chance. Contact NorthCan Roofing today for a comprehensive roof inspection or consultation. Our team of seasoned professionals is ready to provide you with customized solutions that meet the unique needs of your property. Whether you need a new gravel roofing system, repairs, or regular maintenance, NorthCan Roofing covers you. Protect your investment, enhance your building’s value, and ensure long-term peace of mind by partnering with the best in the business.