Over the last twenty years, flat roofing systems have become more popular around the Greater Toronto Area. Yet, while flat roofing systems have come with many advantages, they also bring with them new challenges as well. For example, while flat roofs are easy to install, their cost-effectiveness also makes them a less cost-effective long-term option for roofing material. The end result is that the homeowner must either replace or repair their flat roof over time.

The increased cost of commercial flat roofs in Toronto and throughout the rest of the province have prompted a variety of solutions. One of the most common solutions is uv sealants. While commercial grade uv sealants have the benefit of being easier to apply and less expensive than residential products, they do come with one major drawback. That is that UV sealants may not be the right solution for all kinds of flat roofing systems in Toronto.

There are two main types of flat roofing systems found in the Greater Toronto Area (GTA): flat roof terrace roofs and parapet wall finishes. Both are effective solutions for reducing infiltration and heat transfer. Unfortunately, they have different pros and cons when it comes to UV exposure. While both can provide a degree of UV resistance when properly installed, rooftop UV exposure can increase if certain conditions are present. These include: high temperatures during the day, cold nights, or condensation between the flat roof surface and the underside of the flashing.

To solve this problem, commercial grade of sealants have been developed that employ a double water-based urethane membrane. This water-based barrier forms a protective sheath on the surface of the roofing system, while simultaneously providing a high degree of UV resistance. While these systems are more expensive initially, due to the cost of materials as well as the labour involved with installing them, they can prove to be an excellent solution. Ultimately, a combination of flat roof membranes and flashing will ensure that any UV exposure is kept to a minimum, even when high temperatures are experienced.

Not all roof replacement or repair work will require a urethane membrane, however. As a rule of thumb, most any roof repair or replacement work should involve some type of barrier application to reduce infiltration. These applications are often available in both commercial (for industrial or commercial applications) and residential (for domestic applications).

Two of the most common causes of leaks on flat roofs in Toronto are pitched roofs and drainage problems. The former results from the lack of adequate support; often a roof that doesn’t sit level is susceptible to pitch. Asphalt pitches can be notoriously unstable, frequently requiring a specially designed underlayment to ensure that the structure remains solid and level. Drainage problems can be caused by a buildup of dirt and debris within the gutters, causing small tears that are easy to seal. In addition, drains can be clogged with debris, which prevents water from draining. To solve both of these problems, a sealant application is required along with routine cleaning and repairs.

For pitch-topped roofs, a roofing membrane may be recommended as an effective solution for water runoff and drainage problems. A rubberized coating will stop the pitch from becoming worse, while at the same time protecting the roofing and surrounding areas. Drainage outlets can also become clogged with dirt and debris, especially around drainage outlets and at the edge of the pitch. To address this issue, a sealant application will be required, along with regular cleaning and repairs. If these measures are not followed, the roof may begin to sag and break, which could result in the need for a complete roof replacement.

Regardless of the type of flat roof replacement, damage and leaks can be quickly corrected, which allows homeowners to get back to their homes and businesses without putting anyone’s life at risk. Preventive maintenance is essential to ensure that damage does not become worse and leaks are not allowed to become bigger or more expensive. By hiring a professional, knowledgeable company to perform all of the necessary repairs, home and business owners can rest easy knowing that their roofs will be protected from the elements and are ready to face the challenges of the coming year.