External pavements of a house
External pavements are outdoor pedestrian spaces that are generally provided to allow people to walk around the perimeter of the house and to protect the masonry from garden damp.
The two main ways of creating a pavement are:
- floating pavement on a draining gravel trench
- floating floor on supports
- floor glued to a screed resting on a concrete casting, duly waterproofed
- floor laid in sand and cement on concrete casting
The first type of floor is draining, i.e. water flows through the floor and is then drained through a trench with a drainage pipe at the bottom.
The second method involves waterproofing the floor on which the screed rests with a bituminous sheath, which in turn is protected from infiltration by a cement membrane. In this case, the water drains away, by slope, towards the outside and must be managed.