Glossary

Wall chase (roza, regata en la pared)

A groove cut into a wall, ceiling or floor to bury the conduits of the electrical installation. It is then filled with plaster or mortar and painted, so the cables are hidden.

What a roza is

A roza or regata is the chase the electrician cuts into the wall to lay the conduit for the cables (in the US you would say channel or groove). It is cut with a wall chaser, an angle grinder or, in brick partitions, hammer and chisel. Once the conduit and boxes are in, it is filled with plaster and ready to paint.

How chases are routed

  • Horizontal and vertical runs only, never diagonal, so anyone can tell where the cables are and avoid drilling into them.
  • Horizontal runs close to the ceiling or the floor.
  • Vertical runs in line with the switches and sockets.
  • No chases in load-bearing walls or pillars without technical advice.

Chasing or surface wiring

Chases leave a clean wall but create dust, noise and plastering work. If you want to avoid that, surface trunking (raceway) or moulding is quicker and cheaper, although visible. Plasterboard (drywall) partitions need no chasing: the conduit runs inside the cavity.

Before the work starts

  • Ask for a draw wire in each conduit for future cables.
  • Photograph the routes before they are covered.
  • Ask who fills and paints, because the electrical quote does not always include it.

Cost

As an estimate, chased runs cost 15 to 35 euros per linear metre depending on the job, and a new chased line for a socket or a light 80 to 150 euros, plus VAT. See rewiring old apartments or, without building work, hiding cables in Seville, Spain.

Need an electrician in Seville, Spain?

Call us or send a WhatsApp message with a photo of the job. You get a fixed quote before any work starts.