Mesh Wi-Fi vs extenders vs powerline: which should you buy?
Three ways to get Wi-Fi into rooms your router cannot reach. Here is how each works, what it costs roughly, and which suits which kind of home.
If you have tried the free fixes in why is my Wi-Fi slow and some rooms are still weak, you need a way to carry the signal further. There are three main options.
The quick answer
| Wi-Fi extender | Powerline adapters | Mesh Wi-Fi | |
|---|---|---|---|
| How it works | Picks up your Wi-Fi and repeats it | Sends the connection through your electrical wiring | Several units that work together as one network |
| Best for | One problem room, on a budget | Garden offices, loft rooms, thick walls | Whole-home coverage, larger or awkward houses |
| Rough cost | Cheapest | Middle | Most expensive |
| Main downside | Often halves speed; separate network name | Depends on your wiring; can be unreliable | Cost |
Wi-Fi extenders
An extender sits roughly halfway between the router and the weak spot. It listens to your Wi-Fi and rebroadcasts it.
Good: cheap and easy to set up.
Not so good: because it has to receive and resend on the same radio, many extenders cut speed noticeably. Some create a second network name, so your phone may cling to the weaker one as you walk around.
Choose one if: you have one room that is just out of range, and you want the cheapest fix.
Powerline adapters
You plug one adapter into a socket near the router and connect it with a cable. You plug the second into a socket in the far room. The connection travels through your home’s electrical wiring. Many second adapters also create Wi-Fi.
Good: gets through thick walls and floors that stop Wi-Fi, and can reach a garden office on the same electrical circuit.
Not so good: performance depends on your wiring. Older wiring, extension leads and separate circuits can make it slow or unreliable. Plug adapters straight into the wall, not into an extension lead.
Choose them if: walls are the problem, or the room is a long way from the router.
Mesh Wi-Fi
A mesh system replaces or works alongside your router with two or three units placed around the home. They talk to each other and create one network that your devices move across seamlessly.
Good: the best all-round coverage. One network name. Most are managed with a simple app. Many support newer Wi-Fi standards.
Not so good: the most expensive option. Some systems work best if the units can link with a cable (called “wired backhaul”), which not every home can do.
Choose it if: you have a larger home, several floors, or dead spots in more than one place.
What about your provider’s kit?
Several UK providers sell or include their own Wi-Fi boosters, which are usually mesh units designed to work with their router. Ask before buying. It may be cheaper, and your provider will support it if something goes wrong.
Our suggestion
- Flat or small house, one weak room: try moving the router first, then an extender.
- Solid walls, loft or garden office: powerline.
- Three-bed house or bigger, or several weak spots: a two- or three-unit mesh system.