A mesh system is the right answer when one router cannot cover your house and the problem is distance rather than a single impenetrable wall. Buying well comes down to two decisions: how many nodes, and whether you need a dedicated backhaul radio. Almost everything else is marketing.
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The short answer
Start with one node per floor, plus one for any room behind a particularly bad wall. Tri-band systems reserve a radio purely for node-to-node traffic and are worth the extra money if you cannot run ethernet between units; dual-band systems are fine if you can. Every node should have ethernet ports, because even one wired node transforms the whole system.
Dual-band or tri-band
A dual-band mesh node uses the same radios to talk to your devices and to the other nodes. That halves throughput on the link between them, because each packet is received and retransmitted on the same radio.
A tri-band system adds a third radio used only for node-to-node traffic, which removes the halving entirely. It costs more and it is the main thing you are paying for at higher prices.
The exception that changes everything: if you can run an ethernet cable between nodes, a dual-band system with a wired backhaul performs as well as a tri-band one with a wireless backhaul, for considerably less money. A cable along a skirting board is worth an hour of your time.
The picks
TP-Link Deco S4 Mesh AC1900, 3-Pack
The sensible starting point for most houses. Three nodes at a price that is often less than a single premium router, ethernet ports on every unit, and a setup process that takes about fifteen minutes from the app. It is dual-band, which means the wireless link between nodes costs you throughput, so place them carefully or wire at least one. For general browsing, streaming and video calls across a normal house, it is more than enough.
TP-Link Deco X15 Dual-Band AX1500 Wi-Fi 6 Mesh
A step up to Wi-Fi 6, which is worth having less for the speed and more for how much better it handles a house full of devices at once. If you have twenty or more connected things, that difference is real. Still dual-band, so the same wired backhaul advice applies.
TP-Link Deco 7 Pro Tri-Band Wi-Fi 7 Mesh
The tri-band option, and the one to choose if running ethernet between nodes is genuinely impossible. The dedicated backhaul radio means nodes talk to each other without stealing bandwidth from your devices, and in a large house with nodes far apart that difference is substantial rather than marginal. Expensive, and worth it only for the specific problem it solves.
TP-Link Deco 7 Dual-Band BE5000 Wi-Fi 7 Mesh
Current-generation hardware without the tri-band premium. Sensible if you are buying for the next several years and can wire at least one node. Wi-Fi 7 brings little most households will notice today, but it is not a reason to avoid it when the price is close.
ASUS RP-AX58 Wi-Fi 6 Range Extender
Listed because mesh is not always the right answer. If exactly one room has poor coverage and it is used for light browsing, an extender placed at the midpoint is far cheaper and adequate. Understand the trade: a single-radio extender halves throughput, and devices cling to it even when the router would be better.
How many nodes
- Flat or small house: two nodes, and often one good router is enough.
- Two-storey house: two to three, one per floor plus one if the layout is awkward.
- Three storeys or a long house: three, possibly four.
- Add one for any room behind stone, foil-backed insulation, or a chimney breast.
More nodes is not automatically better. Each wireless hop costs throughput, and a chain of three nodes gives the last one very little to work with. Two well-placed nodes beat four badly placed ones.
Place nodes for their link back to the main unit, not for the room you want to cover. Roughly halfway between the router and the dead zone, where the app still reports a good connection between nodes. Putting a node in the dead spot itself is the single most common mesh mistake and it does not work.
What matters and what does not
Worth paying for
- Ethernet ports on every node, so you can wire the backhaul later
- A tri-band design if wiring is impossible
- An app that shows node-to-node link quality, which you need for placement
- The ability to add nodes one at a time
- Support for splitting bands, for smart home devices
Ignore
- Headline speed figures, which add every band together and assume ideal conditions
- Coverage area claims, measured in open space and meaningless in a real house
- Buying four nodes when two well-placed ones would do
- Systems requiring a subscription for basic features
- Replacing a perfectly good router before trying to move it
Before buying anything, move your existing router. Routers usually sit where the line enters the house, which is typically a corner and close to the worst possible position. A router relocated to a central spot, up high and in the open, covers houses that the same router in a hallway cupboard cannot. It costs nothing and it works more often than people expect.
How many mesh nodes do I need?
One per floor to start, plus one for any room behind a particularly bad wall. Two well-placed nodes beat four badly placed ones, because each wireless hop costs throughput.
Is tri-band worth the extra money?
If you cannot run ethernet between nodes, yes, because the dedicated backhaul radio avoids halving your throughput. If you can wire them, a dual-band system performs just as well for less.
Can I keep my existing router?
Usually. Put it in modem or bridge mode and let the mesh handle the network, or connect the mesh to one of its ethernet ports and disable its Wi-Fi. Running two Wi-Fi networks causes more problems than it solves.
Will mesh fix a stone wall?
Only if a node can be placed on the far side of it with a usable link back. Mesh is still wireless, so a wall that blocks Wi-Fi blocks the backhaul too. That is the case where powerline or a cable is the real answer.
Is Wi-Fi 7 worth waiting for?
For most households, no. Wi-Fi 6 already handles a busy house well. Buy Wi-Fi 7 if the price is close, not as a reason to delay.
The bottom line
Move your existing router first, because it is free and it sometimes solves the problem outright. If you do buy mesh, start with one node per floor, insist on ethernet ports, and wire the backhaul if there is any way to do it. Choose tri-band only if wiring is genuinely impossible, since that is the specific problem the extra radio exists to solve.
