Green roof
Turn your gray roof into a beautiful piece of nature or a flower meadow. The vegetation on a natural roof consists of sedum, grasses, perennials, and various herbs. This vegetation has a wide variety of flowering times and colors. Not only does it look beautiful, but it also provides a pleasant living space for birds, butterflies, bees, and other insects. Because the package is thicker, a natural roof can retain more water.
Want to create a natural roof? The steps are similar to those for installing a sedum or retention roof. However, you will need to use different materials and plants. A natural roof requires a thicker substrate layer and a higher drainage plate. The substrate layer and drainage plate form the underlay and base of the green roof.
Costs
The cost of a green roof is higher than that of a sedum roof because more material is required.
Use of space
A green roof does not take up any extra space in your garden.
Difficulty
It is important that the roof can bear enough weight to prevent leaks. The roof structure must have sufficient load-bearing capacity.
Earthmoving
No earthworks are required. However, the substrate and plants must be installed on the roof.
Maintenance
Just like in the garden, plants on the roof also need maintenance. Fertilizing annually is good for the plants. Tip: think about maintenance before planting. Checking the drainage is important.
Climate goals
Green roofs reduce heat stress. They also slow down and reduce rainwater runoff. These roofs also contribute to biodiversity through the variety of plants they support. To accommodate larger peak rainfall events, a combination with an infiltration facility is sometimes necessary.
Biodiversity
Contribution to improving biodiversity
Points of attention
- The roof must be able to bear a minimum load of 100kg/m ².
- Try to keep grasses out of the planting.
- Because the package is thicker, a green roof can retain more water.
- Weeds must be removed during maintenance.
- Check the drains regularly.
