FAQ
Here you will find the most frequently asked questions and answers 24 hours a day, 7 days a week. However, the technical issues may be different for each project. So if your roof is complex, we recommend that you contact our technical department. They will be happy to help you.
Application of DerbigumA gravel zone :
Is required in some cases to prevent fire propagtion on the surface of the roof.
Facilitates the the maintenance of the glass surfaces of adjacent facades / windows
Prevents the overgrowth of certain sensitive elements (rainwater drains for example)
Separates zones with and without vegetation
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