The building consists of two roof terraces situation one above the other and which are surrounded by a wooden wall. The concrete deck was first covered with a primer before applying a Derbicoat NT. One part was insulated before receiving a vapour barrier in Derbicoat NT 2,5 mm and a final layer in Derbigum SP FR 4 mm, completely bonded. The finishing of the upstand was also done in Derbigum SP FR 4 mm. Because the lower terrace is completely covered, it was possible to continue working even in bad weather.