A weak signal in the back bedroom feels like a broadband problem, so people upgrade their plan and nothing changes. It rarely helps, because a faster line does not travel any further through a brick wall. Coverage is a separate problem with its own, mostly inexpensive, solutions.
Confirm it is coverage first
Run our speed test standing next to the router, then again in the problem room. If the first is close to your plan and the second collapses, you have a coverage problem, not a service problem. If both are poor, read why Wi-Fi tests slower than your plan instead.
Move the router. The free fix nobody does
Routers end up wherever the cable enters the house, which is often a corner, a cupboard, or the floor behind furniture. Signal radiates outward and is absorbed by everything solid, so placement matters enormously:
- High and central. A shelf in a hallway beats a cupboard in the corner by a wide margin.
- Out in the open. Cupboards, media units, and metal shelving all absorb signal.
- Away from interference. Microwaves, cordless phones, and baby monitors sit in the same frequency range. Water absorbs radio well, so aquariums and even boilers matter.
- Aerials positioned deliberately. On routers with external aerials, one vertical and one horizontal usually covers more of a multi-storey home than both upright.
Use the right band
Modern routers broadcast on 2.4 GHz and 5 GHz, and newer ones add 6 GHz. The trade-off is simple: 2.4 GHz travels further but is slower and far more congested; 5 GHz is much faster but weakens more quickly through walls. Devices sometimes cling to the wrong one. Where your router allows separate network names per band, connecting stationary devices explicitly to 5 GHz, and leaving distant, low-demand devices on 2.4 GHz. Resolves a surprising number of complaints.
On 2.4 GHz, only channels 1, 6, and 11 do not overlap. If your router picks channels automatically and your area is crowded, manually setting one of those three sometimes helps.
Extending coverage properly
When placement is not enough, the method matters more than the money:
- Wired access point. Best. Run Ethernet to a second router or access point in the far part of the house. Full speed, no compromise. This is what to do if a cable run is at all possible.
- Mesh system. Very good. Purpose-built nodes that hand devices between them seamlessly and, on tri-band models, keep a dedicated radio for node-to-node traffic. The right answer for most homes.
- Powerline adapters. Situational. Data over mains wiring. Excellent in some houses, poor in others depending on the age and layout of the circuits.
- Cheap repeaters. Last resort. A basic repeater receives and retransmits on the same radio, which halves throughput by design, and often creates a second network you have to switch between manually.
Take the load off the air
Every device on Wi-Fi competes for the same airtime. Wiring the stationary ones. Television, console, desktop. Frees capacity for everything that genuinely needs to be wireless. Our comparison of Ethernet vs. Wi-Fi covers which devices are worth cabling.
Consider the router age
If your router predates Wi-Fi 6 and came free with a contract several years ago, it is likely the ceiling on your whole network. A modern router or mesh set will outperform it on both range and capacity, particularly with many devices connected.
Frequently asked questions
Do Wi-Fi boosting apps work?
No. Software cannot change radio physics. Analyser apps that show channel congestion are genuinely useful for diagnosis, but nothing on the phone increases signal.
Will a mesh system slow my speed?
A good tri-band mesh keeps a dedicated radio for traffic between nodes, so the loss is small. Cheap dual-band mesh shares that path and gives up more.
How many nodes do I need?
Most homes need one main unit plus one or two nodes. More is not better. Overlapping nodes can cause devices to hop unnecessarily.
