Why one router is not enough

Wi-Fi signals weaken quickly through concrete walls, floors and metal. In tall, narrow houses with several floors, a single router on the ground floor often leaves the upper rooms with weak signal, low speed and dropped calls.

The 5 GHz band is faster but travels less far than 2.4 GHz, so devices far from the router fall back to slower connections. Adding a stronger router helps only a little; the walls are still there.

The real fix is to bring a Wi-Fi transmitter closer to where people use the internet.

The three main options

A range extender, or repeater, listens to your router and rebroadcasts the signal. It is cheap and easy, but because it uses the same radio to receive and send, throughput can fall to around half, and many models create a separate network name.

A mesh system uses several units that work together under one network name and hand devices from one unit to another as you move. Better systems have a dedicated radio or a cable link between units. An access point connected by Ethernet cable gives full speed on every floor and is often the best value if you can run cable.

  • Extender: cheapest, simple, lower speed and roaming problems.
  • Mesh: seamless roaming, easy app setup, higher cost.
  • Wired access point or mesh with Ethernet backhaul: best speed and stability.
  • Powerline adapters: use house wiring, results vary with the electrical installation.

Placement matters most

Put a mesh node or extender halfway between the router and the dead zone, where it still receives a good signal, not inside the dead zone itself. A unit that receives a weak signal can only rebroadcast a weak signal.

In multi-storey homes, place units on the stairwell or directly above each other, and keep them in the open rather than inside cabinets or behind the TV. If you can run even one cable between floors, use it for the link between units.

Use the same Wi-Fi name and password as before where possible so devices reconnect automatically.

How to measure the improvement

Run a speed test in each room before and after, on the same phone, at a similar time of day. Note download, upload and ping. A good setup gives similar results everywhere, with ping staying low and stable.

If the speed near a node is much lower than near the router, the backhaul link between units is the bottleneck. Moving the node closer or using a cable usually fixes it.

Before and after measurements
Room            Before        After (mesh, cable backhaul)
Ground floor    280 Mbps      285 Mbps
2nd floor       45 Mbps       240 Mbps
4th floor       5 Mbps / drops 210 Mbps

Working with your provider modem

If you add your own mesh system, avoid two layers of NAT. Either set the mesh to access point or bridge mode, or switch the provider modem to bridge mode and let the mesh router handle the connection.

Turn off Wi-Fi on the provider modem or give it a different name if you keep both, to stop devices clinging to a weak signal. Some providers also offer their own mesh units that integrate with the modem.

Double NAT can break port forwarding and some online games, so check your NAT setup after installation.

Common questions

Will mesh increase my internet plan speed? No. It improves Wi-Fi coverage, so you get closer to the speed you already pay for.

Can I mix brands? Usually not for mesh; extenders and wired access points work with any router.

Is Wi-Fi 7 necessary? Not for most homes. Good placement and a wired backhaul matter more than the newest standard.