Technical interfaces: electrical, pool and drainage systems

The precise positioning of service pipes within the foundation is absolutely essential. Carving out the reinforced concrete slab at a later stage is time-consuming and compromises its structural integrity. Therefore, the rule is: plan first, then pour.

An overview of the dimensional specifications

Details on installation

• Conduit pipes for electrical wiring: To ensure that no cables lie in the way in the room, the conduit pipes should be positioned in the foundation so that they either exit directly within the wall route or discreetly in a corner. Maintain a safety distance of at least 8 cm from the outer edge of the house wall.
• Drainage & septic tank: The downpipe must be positioned precisely beneath the roof drain. Where the foundation and house are the same size, the ideal position is 10 cm from the outer corner of the foundation to the outer edge of the drainage pipe.
• Special case: pool equipment: If the house is used to house pool equipment, the thicker pipes and their fittings require more space. A distance of 20 cm from the outer edge of the wall ensures there is sufficient room for manoeuvre for tools and hands during installation or subsequent maintenance.

Planning tip for concrete foundations: Mark the positions of the pipes on the formwork before the concrete is poured, and secure them to prevent slipping. Even a deviation of just a few centimetres can result in a pipe ending up directly beneath a load-bearing joist later on.