Membrane TPO

TPO (Thermoplastic Polyolefin) membranes are typically white but also available in different colors for very large surfaces. These synthetic membranes now take a large share of the flat roof market and this proportion has been increasing for more than 25 years in Quebec.
Ideal for flat or low-pitched roofs, their polyester reinforcement allows them to be mechanically fixed (screwed) to the decking (bridging) of the roof. This installation method is the most used since it allows a great saving of installation time and glue, thus making it more economical and more ecological.

Reflects the rays of the sun

  • The white TPO membrane is said to be energy efficient because it reflects the rays of the sun which warm darker roofs. This reflectivity will potentially be useful in reducing energy consumption associated with cooling the building, but especially in combating the effects of urban heat islands created by absorbent surfaces such as concrete and asphalt. This reflective effect also allows a substantial reduction in summer overheating which accelerates the aging of the exposed materials.
  • The solar reflectivity index (IRS) of the TPO membrane is among the best on the market, exceeding the requirements of the EPA ENERGY STAR program and Quebec municipal regulations.


  • The TPO membrane offers superior resistance to aging caused by exposure to ultraviolet (UV), ozone, and pollution.
  • The TPO membrane is reinforced with polyester canvas, ensuring exceptional resistance to punctures, tears, and attacks from small rodents.
  • The seams welded with very hot air form an ultra-strong homogeneous bond.
  • No flame is necessary for the installation of the TPO membrane.
  • Different installation techniques and thickness of TPO are available, depending on the surrounding conditions and the use of your building. Consult our experts, they will guide you towards the best option.


  • We prefer a half-inch thick high-density polyisocyanurate panel under our membranes. This very rigid panel offers rot-proof support, perfect for absorbing the impacts of hail and traffic.
  • The TPO membrane comes in a width of 5 to 12 feet by 100 feet long. Serrated washers are screwed at regular intervals under all roller joints, as well as around the perimeters of the roof and around every mechanical component and detail of the roof.
  • The joints are welded using a welding robot, with the exception of a few details which are welded with a hand iron. All joints are checked after each day of construction.
  • At Couvertures Montérégiennes, the boxes of mechanical units (ventilation, air outlet, or other) are always manufactured and tested in the workshop in order to ensure a perfect seal when they arrive on site.


  • TPO membrane is the best alternative for durability, long term value
  • as well as for its warranty. A 10 to 35-year warranty is offered with the TPO membrane, both for material and labor.


  • Cleaning the drain of a pond-type roof is common to all types of coatings.
  • Not allowing objects to swirl on the roof ensures durability.
  • It is important to carry out regular inspections as a precaution, especially in the fall or after extreme weather events

We are accredited by Firestone,

GAF, and Johns Manville


Did you know?

In 2011, the Montreal borough of Rosemont-La-Petite-Patrie adopted a by-law imposing a reflective roof for any new construction or renovation. This regulation has since been ratified each year by new boroughs.

In 2016, the following boroughs adopted a by-law on reflective roofs: Rosemont, Hochelaga-Mercier-Maisonneuve, Villeray-St-Michel-Parc Extension, Sud-Ouest, Notre-Dame-de-Grâce-Côte-Des-Neiges, Ville-Marie, Ahuntsic-Cartierville, Outremont, Plateau-Mont-Royal, Anjou and St-Laurent.

Note that the boroughs of Rosemont and Outremont even banned the asphalt and gravel system in 2015 and that the Plateau Mont-Royal by-law only concerns new buildings and extensions.

The TPO membrane has been on roofs since the 1980s and the oldest roof of its type in Quebec is believed to be nearly 25 years old today and is still in excellent condition.