Sustainable building materials
Building materials such as copper, zinc, and lead, as well as roofing materials such as bitumen, can leach. This means that substances from (building) materials slowly dissolve in, among other things, runoff rainwater. The substances can reach surface water and are harmful to the environment. Nowadays, only sustainable (CE-marked) building materials may be used. Even in older homes, rainwater can usually be disconnected without any problems, because the leaching of building materials decreases over time. Disconnection is not recommended only in the case of asbestos roofs. The municipal disconnection advisor can provide advice on this.

Costs
Sustainable construction is not necessarily more expensive than non-sustainable construction. Thanks to different construction methods and use of materials, sustainable construction can sometimes be cheaper.
Difficulty
It is advisable to seek advice on the use of sustainable building materials.
Flooding
Green roofs and certain types of paving can retain rainwater or slow down its drainage.
Heat stress
The use of sustainable materials and the installation of green roofs keeps your home cooler in the summer.
Water quality
Only use certified building materials when replacing gutters and roofing. This will prevent harmful substances from polluting our groundwater and surface water.
Tips
- Opt for sustainable building materials or choose a natural roof, a retention roof, or a sedum roof. With a green roof, you will also experience less heat in your home and contribute to increasing biodiversity.
- Sustainable buildings are more energy efficient in use and are often healthier for residents and users.
- More information (Rijksoverheid)
- More information (InfoMil)