The classic, extensive green roof: a base layer dotted with succulents.

What is a sedum green roof

extensive green roof got its name from the low maintenance needed. It maintains itself, so to speak: providing fertiliser once or twice a year is enough. This type of green roof provides high performances on water consumption and offers thermal benefits, while the overall weight of the green roof remains low. The build-up height is from 9cm and the water-saturated weight from 90 kg/m².

Technical properties

Building height

From 9 cm

Water-saturated weight

From 90 kg/m²


Minimum, 1 to 2 times a year provide fertiliser

Construction of a green roof


Extensive vegetation consisting of various species of Sedum - these are 'succulents'. Can be installed using cuttings, plug plants or sedum vegetation mats (pre-cultivated).

Substrate layer

Relatively thin substrate layer (5-7cm) consisting of mineral rocks e.g. Lava, bims and a small amount of organic material where vegetation takes root and provides cover over time (e.g. 60% after one year).

Filter layer

Separation layer between substrate and drainage. Allows excess water to pass through and makes the water in the drainage layer available to the vegetation through condensation.

Drainage layer

Drain excess water to roof drains. This layer may contain water reservoirs that provide an additional water buffer. There are many different options as drainage, feel free to ask for more info!

Protection and absorption layer

Protection of the roof against mechanical damage; at the same time, it also buffers a quantity of water.


Root-resistant roof waterproofing.

Some advantages of an extensive green roof


Green roofs provide a natural barrier to weathering, protecting your roof structure from the elements and extending its lifespan


The evaporation process of plants on green roofs lowers the ambient temperature, creating a natural coolness and contributing to a more pleasant microclimate.

Water buffering

Green roofs absorb rainwater and thus prevent overloading the sewer system, contributing to effective water control and reducing flood risks.

Attracting insects

The diversity of plants on green roofs attracts different insects, contributing to a healthy ecosystem and promoting biodiversity.


The vegetation layer and substrate layer act as sound insulation, absorbing sounds and contributing to a quieter environment.

Absorption of CO2 and particulate matter

Plants on green roofs absorb carbon dioxide (CO2) and filter fine dust from the air, contributing to a cleaner and healthier living environment.

Protection against fire

Green roofs reduce the risk of fire spread by creating a green buffer layer that acts as a natural fire retardant.

So much more...

Find out how a green roof not only benefits the environment and health, but can also transform your living space into a green paradise tailored to your specific needs

Green roofs realisations

Discover all possibilities

The classic, extensive green roof: a base layer dotted with succulents.

A vibrant mix of native plants and flowers.

Integrate greenery on slopes up to 45 degrees with our specially designed green roof.

Suitable for growing fresh vegetables and herbs, on your roof.

A true roof garden, perfect for extensive planting and relaxation.

Captures rainwater and discharges it delayed, while you enjoy the green look.