Flat and low-pitched roofs contribute to the creation of thermal islands in summer because their black or dark surfaces accumulate the energy of the sun. These localized hothouse effects increase the surrounding air temperature by several degrees. Simply installing light coloured or white roofing materials can reduce the effects on your health and save energy on air-conditioning, reducing GHG emissions.

Our recommendations :

1. Elastomeric membranes are asphalt membranes combined with elastomer (flexible polymer). Their lifespan is approximately 21 years in Canada: good quality products that are well installed can last longer. Choose white membranes: they reduce thermal islands and the heat transferred to the building in summer, which allows you to save energy on air-conditioning.
2. Well-installed green roofs are a very eco-responsible solution because they reduce harm to your health by reducing the effect of thermal islands. They also encourage biodiversity, reduce water runoff pollution and improve roof insulation, cutting energy consumption for heat and air-conditioning. But the structure of existing homes usually has to be significantly reinforced to support the additional weight, which could lead to high costs. These roofs require regular maintenance and sometimes irrigation.

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