For one weak room, consider an extender if it can receive a usable signal from the router; a powerline kit is another option when the home's wiring can carry the connection to that room. For several weak rooms or floors, assess a mesh system, which Which? describes as a whole-home approach. If the router itself frequently disconnects or struggles with the household's devices, check whether an ISP upgrade or a compatible replacement addresses that problem before adding coverage equipment.
If Wi-Fi works near the router but drops in a study or bedroom, a targeted extender is worth assessing where it can still receive a usable signal. A powerline kit offers another route to that room, although Ofcom notes that results depend on the electrical wiring.
Video calls, streaming or gaming in different rooms call for coverage beyond a single dead zone. Which? describes mesh as a whole-home system; node placement and the layout of your home still matter.
If problems occur near the router as well as farther away, adding an extender may leave the underlying issue untouched. Ask about an ISP-provided upgrade, or check connection and support requirements before choosing a third-party router.
Start by comparing the connection near the router with the affected rooms. Then choose equipment for the area that needs coverage, the devices used there and the connection your home can provide.
| Priority | What to check | Your needs |
|---|---|---|
| One weak room | Check for a usable router signal where an extender would sit. Test whether the connection in the room supports its intended use; an extender cannot repair an unusable incoming signal. | I need video calls or streaming to work in one room, while Wi-Fi elsewhere is broadly usable. Which? describes an extender as a targeted-area option. |
| Several weak areas | Map the affected rooms and floors, then consider mesh node placement. Check whether the system offers Ethernet backhaul if you intend to connect nodes by cable. | Devices need coverage in several rooms, including when I move around the home. Which? describes mesh as a whole-home approach rather than a fix for just one spot. |
| A distant room | For powerline, check whether the receiving adapter offers the Wi-Fi or Ethernet connections you need. Ofcom says performance depends on the home's electrical wiring. | I want a connection for a distant desk, TV or console where a wireless link is difficult and running Ethernet cable is impractical. |
| Router and ISP setup | Check whether poor performance also occurs near the router. Before replacing it, confirm connection requirements, any provider phone-service arrangements and who will support the setup. | If the router itself disconnects or struggles with connected devices, I need to address that problem rather than only extend its signal. |
| Security support | Check the exact model's declared minimum security-update period and current support status. The National Cyber Security Centre advises against buying devices that are unsupported or nearing the end of support. | I want to know how long the networking equipment is expected to receive important updates before I install it at home. |
If performance is poor beside the router too, extending Wi-Fi into another room may leave the main problem unresolved.
Compare the connection near the router with the weak room before buying. If both are poor, investigate the broadband connection or router condition first.
Walls, floors, interference and, for powerline, electrical wiring affect what reaches a particular room. Ofcom specifically notes that powerline results depend on the wiring.
Use advertised figures to identify a product's stated capabilities, then plan extender or mesh-node positions around the signal in your home. Check the retailer's return terms if you need to assess the setup after installation.
Ofcom cautions that third-party routers can be difficult to set up and that the broadband provider may not help with resulting problems.
Confirm the connection type, any required login or VLAN settings, and whether provider equipment must remain for phone or other services. If retaining it, check whether access-point or mesh mode meets your needs.
The National Cyber Security Centre warns that devices outside manufacturer support can become easier to compromise or may stop working as designed.
Check the exact model's declared update-support period before purchase. During setup, install available updates and set a unique, strong administrator password.
TP-Link's UK product pages cover examples of each route discussed here: extenders, Deco mesh systems, powerline Wi-Fi kits and standalone routers.
Netgear is among the extender and mesh brands covered by Which? in its UK buying guidance.
Which? includes Amazon eero among the third-party router brands it tests for UK consumers.
These options include mesh systems for several weak rooms, a powerline kit for a distant room and an extender for one targeted area. Choose the route that matches where the signal fails, then check the exact product against your existing setup.
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A three-unit mesh option to assess when coverage is weak in several rooms or across floors. Plan where the units will sit, and check the setup requirements and declared security-update period for this exact model before buying.
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A router-and-two-satellite mesh option for several weak areas, with 2.5Gbps Ethernet stated in the product name. Check how it connects to your existing modem or gateway, whether provider services need the existing equipment, and the exact model's update-support period.
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Another three-unit mesh option for coverage across multiple rooms. Decide where each unit could be placed, and confirm ISP setup requirements and the declared security-update period for the exact model.
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A powerline option for a distant room that needs local Wi-Fi or a connection for a fixed device. Ofcom notes that results depend on household wiring; check the intended outlets, router compatibility if you want to use OneMesh, and the exact model's update-support period.
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An extender option for one weak area rather than several distant rooms. Check that it can receive a usable signal at its intended position; if you want EasyMesh roaming, check compatibility with your router and the exact model's update-support period.
Compare the connection near the router with the connection in the weak room. If both are poor, investigate the broadband connection or router first; if only the distant room struggles, check router placement and the signal at any proposed extender or mesh-node position.
An extender is principally a targeted-room option, not the same approach as whole-home mesh. Which? distinguishes extenders for a particular area from mesh systems for wider coverage, so several weak rooms or floors warrant assessing mesh placement and node count.
No result is guaranteed: powerline carries the connection through electrical wiring, and Ofcom says performance depends on how that wiring is set up. Check that the receiving adapter has the Wi-Fi or Ethernet connections needed in the distant room.
A third-party router may be an option once you have confirmed the connection and provider-service requirements. Ofcom cautions that setup can be difficult and your provider may not help with resulting problems; check required credentials, any fibre-ONT arrangement and phone service before replacing the supplied equipment.
Check the manufacturer's declared minimum period for important security updates and the exact model's current support status. The National Cyber Security Centre advises avoiding connected devices that are already unsupported or close to the end of support.