The floors of watertight balconies are built with two elements: the load-bearing element consists of floor beams onto which an element made of boarding or building boards and rolled bitumen material is attached. Onto that an element consisting of impregnated floorboards and impregnated wooden battens is attached. To allow water to flow away from the bitumen material layer, the floor beams of the lower elements and the wooden battens of the top element have been cut at an angle so that the balcony floor stays horizontal.
The accompanying images show two possible solutions for watertight balconies.

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