Waterproofing Layer

Every metal roof needs a waterproofing membrane installed over plywood. In most cases, if the installation of a metal roof is done over an existing roof, such as asphalt shingles, it does not require such membrane. The old roof covering will act as a protecting layer.

Always install waterproofing membranes when installing steel roofing in Toronto for new construction homes. It will protect the house from moisture and condensation.

There are many types of waterproofing membranes available on the market, and it is important to use the correct type for specific application. For example, for standing seam metal roofing system, the best practice is to use High Temperature, self-adhesive roofing underlayment.

Construction of a Wooden Strapping

The next step in the installation of a steel roof in Toronto is the installation of strapping. These are wooden planks that are installed over the insulation layer or the old roof covering in the case of a metal roof over an existing roof.

Double strapping should always be installed, especially when installing a metal tile roof. Some metal roofing systems do not require strapping, please refer to manufacturing guidelines or speak with our metal roofing specialists.

The metal sheets are attached directly to the wooden strappings. Such a wooden grate creates a special gap that promotes air circulation under the metal sheets. The air layer allows you to get rid of moisture and serves as protection against the formation of fungi and moss inside the roof.

Roof Perimeter Flashing

Perimeter flashings are set in the next step. They are installed around the entire perimeter of the roof and protect its edges from moisture and debris. They also protect against strong winds that can damage the fastening of the main sheets of metal roofing.

Flashings are made from the same metal as the main part of the roof. This guarantees their strength and durability, which is inherent in the steel roof. Flashings are securely fastened with self-tapping screws for a snug fit to her cut. This is a very important stage in the installation of a metal roof and all connections must be made with high quality.

Installing New Roof Valleys

Almost every roof of a residential home has several slopes. These points of intersection of the roof bends are considered the most vulnerable to leaks. Special valleys are set up to avoid this problem. They serve as an additional protective layer along which water smoothly rolls off the roof into the drainage system.

Valleys are installed under the base coat. Their ends are bent at the edges of the roof for better retention of rainwater and ice. This allows you to stop rainwater from entering under the main layer of the metal roof covering. A waterproofing layer is glued onto the cut valleys for better waterproofing.

Mounting Metal Sheets 

This is followed by the installation of the main covering of the metal roof. Metal sheets are attached directly to the double strapping using special screws. The method of installation of different types of metal roofs is different. This is due to the technology of fastening metal sheets and their shape.

Installation of metal tile sheets starts from the bottom of the roof and progresses to its very edge. This results in a slight overlap that allows rainwater and ice to slide off the roof without obstruction. For standing seam metal roofs, the sheets are arranged vertically and are using hidden faster system.

Ridge Elements

Ridge elements are designed to protect the edge of the metal roof from water ingress into the interior of the structure. Special techniques and many additional elements are used when installing ridge elements. This is a very responsible process in a metal roofing installation.

Front additional elements are also set at this stage. They are designed to protect all roof cuts from moisture. Also, the front additional elements have a decorative value. They hide all the inner layers of the roof, allowing you to admire the beautiful and complete look of the new metal roof on your home.

Installation of Snow Stops or Snow Guards

The installation of snow stoppers is the final step in the installation of a metal roof. These elements are a protective tool in the winter season. Metal roofing services protect the surrounding area from the fall of huge layers of snow from the steel roof.

Layers of snow and ice crumble against the snow guards and fall to the ground in small pieces. This prevents the possibility of an ice avalanche from coming off your metal roof. Snow guards are an integral part of metal roofing in Toronto.