Flat Roof

Pros and Cons of Different Commercial Flat Roofing Systems

If you are considering a commercial flat roof for your building, there are several different types of flat roofing systems to choose from. Each type of system has its advantages and disadvantages, so it is essential to do your research before making a decision. 

Read on to learn the different commercial flat roofing systems and their pros and cons.

Single-Ply Membrane Roofs

A single-ply membrane flat roofing system is a type of flat roofing system that uses a single layer of material to provide waterproofing and protection from the elements. This type of system is often chosen for its simplicity, as well as its durability, and low maintenance requirements.

Once installed, a single-ply membrane flat roofing system provides an effective barrier against water and wind. This makes them ideal for commercial and industrial buildings, where weather protection is essential.

The single-ply membrane has several advantages over other roofing materials. It is lightweight, so that it can be installed quickly and easily. Moreover, a single-ply membrane is recyclable, making it an environmentally friendly option.

However, they are more susceptible to punctures and tears and can be damaged by ultraviolet light. They also tend to be less stable in high winds and can be more challenging to repair if damaged.

Built-up Roofs

A Built-up flat roofing system is a type of roofing system composed of multiple layers of materials. Built-up flat roofing systems are also commonly referred to as tar and gravel roofs. They are installed by applying layers of asphalt and then covering the asphalt with gravel. 

A built-up roofing system offers several advantages over other types of roofing systems. It is durable and relatively easy to repair if damage occurs. Additionally, built-up roofing systems can be customised to meet the specific needs of a building, and they can be adapted to accommodate changes in the structure over time.

However, they are generally more expensive than other roofing systems and require more maintenance. Built-up roofs are also less energy efficient than different roofs and can be more susceptible to leaks and damage.

Sprayed Polyurethane Foam Roofs

Sprayed Polyurethane Foam roofing systems provide a high-performance, seamless roofing solution for flat roofs. It is a two-component system consisting of isocyanate and polyol resin. These ingredients react when mixed to form a rigid, seamless barrier that expands and cures upon application to the roof surface.

SPF roofs are highly durable, with an expected lifespan of 20-30 years. They are also highly resistant to wind, hail, fire, and other weather damage. In addition, SPF roofs reflect heat away from the building, helping to keep energy costs down.

A disadvantage of an SPF roofing system is that it can be susceptible to ponding water. Ponding water is when water collects on your roof and stays there for more than 48 hours. If not adequately addressed, ponding water can lead to leaks in your roof or premature deterioration of the SPF material.


There are several commercial flat roofing systems, each with advantages and disadvantages. When selecting a roofing system for your commercial flat roof, it is essential to consider the specific needs of your building and the climate in which it is located. A qualified roofing contractor can help you select the best system for your needs and budget.

If you are looking for the best commercial roofers in Saskatoon, look no further than Wilderness Roofing. We provide the best roofing experience possible for our customers. We offer a full range of roofing services, from repairs and replacements to new construction. Contact us today so we can assist you! 

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