Frequently Asked Questions for green roofs

You can find answers to the most frequently asked questions about green roofs here. Feel free to contact us at any time, if you have any further questions. We will be happy to take on your concerns  and are ready to assist you with help and advice.

Questions on installation, servicing & maintenance for green roofs

When should I install a green roof?

Ideally, during the spring or autumn. Sufficient watering is important. However, sedum matting can be installed all year round during frost-free weather.

How should I service an extensive green roof?

We recommend two service visits per year (in springtime and in autumn).

What does servicing for extensive green roofs involve?

You will find servicing instructions here.

Does green roofs need winterproofed?

Since extensive green roofs require very little servicing, no special measures are necessary for overwintering.

Questions on technical prerequisites for green roofing

Which green roofs are permitted without an approval or permit?

Extensive green roofs are not subject to any technical approvals or permits.

How heavy is a green roof?

For a recommended substrate depth of 8 cm, additional loading of approx. 100-120 kg/m² when saturated with water must be taken into consideration for extensive green roofs.

Questions on design and implementation of green roofs

Do green roofs receive any subsidises?

There are no uniform national regulations. Many municipalities now provide direct or indirect subsidies for green roofs. You can either obtain further information here, or directly from your local municipal council..