Installing a green roof? These are the most important focus points


Green roofs are extremely popular these days. Especially in cities, people enjoy their natural character, and they are sometimes even mandatory. Are you also considering installing a green roof? Then it is crucial to be aware of the various important focus points. That way, you can be sure of a high-quality and green roof.

Choosing between the different types of green roofs

No two green roofs are the same. Ask yourself a few questions before installing one: do you want to use the roof as a garden? Are you willing to spend time on the maintenance of your green roof? If the answer to both questions is a resounding ‘yes’, choose an intensive green roof. This type of roof requires the same maintenance as a garden. The vegetation can consist of herbs, grasses and even trees. Of course it is important that your roof construction is sufficiently sturdy, as a green roof can weigh up to 1000 kg/m2. They get even heavier when it rains.

Do you prefer a green roof that requires less maintenance? Then choose an extensive green roof. This type of roof is planted with mosses, grasses and succulent plants. Bear in mind though: this type of roof also requires some attention. It is recommended carrying out a check and maintenance twice a year.

Choosing the right roof covering

A solid and suitable roof covering can save you a lot of headaches. EPDM is sometimes used to seal green roofs. This synthetic material is very thin and has a low puncture resistance. As such, you should really avoid it as a roof covering for a green roof. It is better to go for a bituminous waterproofing system to avoid problems. In addition, these membranes are often root resistant and have high puncture resistance, so that you can walk on the roof with peace of mind. Because this roof covering can be applied in two layers, the underlying insulation layer is also durably protected. Discover the Sopralene MF 5800 Garden.

Compartmentalise your roof

If your roof covering is divided into compartments, you save a lot of hassle in the event of a leak. You can then rapidly trace the source of the leak, and take action immediately. Compartmentalising is also easy to implement with a bituminous membrane. A green roof, in which EPDM has been used, needs to be completely pulled out in the event of a leak, and it requires a lot of time and money to repair it. The chance of a leak is therefore much smaller than with EPDM. The risk of a leak is also much lower with a bituminous two-layer system, compared to a single-layer thin plastic film. Moreover, bitumen has a very long service life, 40 years on average.

Would you like more information about green roofs and the right bituminous roofing material? Then don’t hesitate to contact us.