The terrace deck is constructed at a deeper level so the structure forms a single level with the surrounding ground surface. May only be constructed as a deck with open gap in order to ensure ventilation. A min. distance of 4 cm between the construction beams and rising, solid components must always be observed. A min. distance of 2 cm between the floorboards and rising, solid components must always be observed. Not suitable for Signum and Dynum floorboards if sufficient ventilation/rear ventilation cannot be ensured.