Wi-Fi extender vs a second router vs a cable to the ceiling: fixing a Nigerian two-storey signal dead spot

The Nigerian double-storey house has a physics problem the marketing solves badly: the ground floor router broadcasts through a concrete slab with steel mesh inside, and concrete-and-steel is the champion of Wi-Fi assassination. The box of hope sitting on the shelf - the plug-in extender - usually makes it worse before dinner. Here is why, and the order of fixes that works.

Why the extender disappoints

A single-band extender receives the signal and re-sends it on the same radio - it talks twice so it goes half as far, and everything behind it shares one breath. Dual-band extenders do better (receive on one band, rebroadcast on the other), but they still sit in the dead zone receiving the very signal that is already struggling. The honest rule: extenders amplify a bad situation; they do not fix it, and each one added to the house is another neighbour's channel to fight over at night.

The three real fixes, in cost order

• The second-router-as-access-point trick. Any cheap router with an Ethernet port can be an access point: run one cable - even an ugly external one clipped along the wall - from the main router to the second floor, plug it into the second router's LAN port, turn off that router's DHCP, and give it the same network name and password on a different channel. Now devices roam to whichever is louder. This is the same job a mesh kit does for many times the money.
• Powerline adapters, with an if. In houses on stable wiring - one meter, clean connections - powerline carries the network through the electrical copper to another room's socket. The if: Nigerian homes often have separate circuits, old joints and stabiliser-heavy wiring; a good kit on one ring beats a bad one across two meters. Buy from a shop that lets you test on your own circuit before the week is out.
• The ceiling-cable endgame. One Cat6 run in the ceiling - through the roof space if you have one, clipped externally if you don't, with proper conduit where the sun hits - turns every future fix into plug-and-play. It is the one installation a competent electrician can do on the same visit as the wiring repairs, which is how the labour cost stays civilised.

What to do tonight, free

Move the router: central, high - top of a wardrobe, not behind the TV where the metal panel eats it - and change the control-channel to the one your phone's Wi-Fi scanner shows as empty, because on a street of thirty networks, the least-crowded channel is worth more than any box. Then decide from the signal you actually measure - a phone's Wi-Fi reading at the dead spot is the instrument this whole page rests on, and it is in your pocket.