So you don't want network cables running all around the house but the wifi signal from your router doesn't quite get to those hard to reach areas.  Why not consider a Homeplug Network Adapter Kit.  These little plugs provide a convenient solution to extend your home network by using standard electrical outlets.  The kit provides you with everything you need to set up an internet connection in any room without running new wires.

They are simple to set up. You plug one homeplug into a wall socket near your router and connect a network cable to/from the router, then you put the other homeplug into a wall socket near the computer and run a network cable to/from it.

Netgear Homeplug Adapter Kit 75 Euros including IVA

We can also supply units that will emit a wireless signal.  You plug one homeplug into a wall socket near your router and connect a network cable to/from the router and then you put the other homeplug into a wall socket near the computer and it transmits a wireless signal for you to connect to.  Ideal if you want to receive a signal while sitting near the pool or on the terrace.

Netgear sender and wifi transmitter kit  150 Euros including IVA

The above prices include delivery to customers in Alcalali, Benidoleig, Benissa, Benitachell, Calpe, Denia, Jalon, Javea, Moraira, Murla, Orba, Parcent, Pedreguer, Sagra, Sanet y Negrals or Teulada.  Installation is available at additional cost if required.