Weak Wi-Fi in part of the house is rarely solved by a faster broadband package. The usual problem is that the signal from the router does not reach far enough, because of distance, thick walls, floors or interference. The fix depends on the size and layout of your home.
As a rule of thumb: if only one room is weak, try moving the router first and then consider a simple extender or powerline adapter. If several rooms or a whole floor struggle, a mesh Wi-Fi system is usually the most reliable answer. A new router alone helps most when the one you have is old, or when you need features it does not have.
This guide covers the free fixes first, then compares the hardware options and explains the numbers on the box. You can compare current models in the routers range.
Free fixes to try first
Ofcom, the UK communications regulator, has published simple advice for getting more from home Wi-Fi. Most of it costs nothing:
- Put the router in a central, open spot, ideally raised off the floor, rather than in a cupboard, behind the TV or at one end of the house.
- Keep it away from interference: microwave ovens, cordless phones, baby monitors and some lamps and speakers can all disrupt Wi-Fi. Ofcom specifically warned that using a microwave can reduce Wi-Fi performance.
- Use a cable where you can. A desktop PC, games console or smart TV near the router works better on an ethernet cable, and it frees up Wi-Fi for phones and laptops.
- Restart the router now and then, and keep its software up to date.
- Test the connection at the router itself. If the speed is poor even there, the problem is the broadband line, and the provider should be your first call.
Ethernet leads of different lengths are in the cables range.
Your options compared
| Option | How it works | Best for | Drawbacks |
|---|---|---|---|
| Wi-Fi extender | Picks up the router’s signal and repeats it | One weak room near the edge of coverage | Can cut speed; may create a second network name |
| Powerline adapters | Send data through your home’s electrical wiring | Rooms separated by thick walls or floors | Speed depends on the wiring; avoid extension leads |
| Mesh Wi-Fi system | Several units work together as one network | Larger homes, several floors, many devices | Costs more than an extender |
| New router | Replaces the router itself | Old router, need for newer Wi-Fi or more ports | Does not by itself fix range in a large home |
Wi-Fi extenders
An extender is the cheapest option. Place it roughly halfway between the router and the weak spot, where it still gets a good signal. Many basic extenders use the same radio to talk to the router and to your devices, so the speed available beyond the extender can drop noticeably. They suit one problem room rather than a whole floor.
Powerline adapters
Powerline kits use two or more plugs: one connects to the router with a cable, the other sits in the room that needs a connection and gives you an ethernet port, Wi-Fi, or both. They are useful in old houses with thick walls and in garden offices on the same electrical supply. Results vary with the age and layout of the wiring, and adapters work best plugged straight into a wall socket, not into an extension lead or surge protected strip.
Mesh Wi-Fi
A mesh system uses two or three matching units placed around the home. They share one network name and password, and your phone or laptop moves between them as you walk around. Better systems use a dedicated connection between the units, or let you link them with ethernet cable, which keeps speeds up. Most mesh kits connect to your existing router; some providers’ routers then need to be put into modem mode or have their Wi-Fi switched off to avoid two competing networks.
Reading the numbers on the box
- Wi-Fi standard. Wi-Fi 5 (802.11ac) is still common. Wi-Fi 6 (802.11ax) handles many devices at once more efficiently. Wi-Fi 6E adds the 6 GHz band, and Wi-Fi 7 (802.11be) is the newest standard. Your phone and laptop need to support the newer standard to benefit.
- Bands. The 2.4 GHz band reaches further and passes through walls better; 5 GHz is faster over shorter distances. Dual band routers offer both; tri band adds a second 5 GHz or a 6 GHz band. Many smart plugs and other small smart home gadgets only use 2.4 GHz, so keep that band switched on even if your phone and smart speakers prefer 5 GHz.
- Class numbers such as AC1200, AX1800 or AX3000 add up the theoretical maximum speed of all bands in megabits per second. Real speeds are much lower, and no single device gets the full figure, so treat them as a way to compare models in the same range.
- Ports. Count how many devices you want to connect by cable. Gigabit ethernet ports are the norm; faster multi gigabit ports only matter on very fast full fibre connections.
- Modem type. On a copper or part fibre line (FTTC) you need a router with a built in VDSL modem, or your provider’s router. On full fibre (FTTP) the fibre box on the wall has an ethernet socket, and any router with an ethernet WAN port can connect to it.
Do you need your provider’s router?
Most UK providers supply a router, and it is often fine for a flat or small house. You can usually use your own router or add a mesh system instead. Some providers’ services, phone lines or TV boxes work best with their own hub, so check with your provider before replacing it completely. Adding a mesh system behind the provider’s router is the lower risk option.
Quick checklist
- Test the speed next to the router to rule out a line fault.
- Move the router to a central, raised, open spot.
- Use cables for devices that sit still.
- One weak room: extender or powerline.
- Several rooms or floors: mesh.
- Old router or too few ports: new router.
- Check the modem type for your connection before buying a router.
Common questions
How many mesh units do I need?
A flat or small house often manages with two. A larger house over two or three floors usually needs three. Place each unit within good range of the next, not in the far corners of the house.
Will mesh Wi-Fi make my broadband faster?
It cannot make the line itself faster, but it lets more of the speed you pay for reach the rooms where you use it. If your speed is poor right next to the router, contact your provider.
Is Wi-Fi 6 worth it if my devices are older?
A Wi-Fi 6 router works with older devices, and it helps when many devices share the network. The full benefit only comes when your phones and laptops support it too. If you work from home, the guide to choosing a computer monitor may also help you set up your desk.
