Fix Your Wi-Fi Dead Zones Before You Buy Anything

Before you spend anything on new hardware, try this. A large share of dead zones are caused by where the router sits and what stands between it and you. Those cost nothing to fix, and no amount of money spent on a faster router will fix them if you skip this step.

Work through the list in order. If you reach the end and still have a dead zone, then you have a hardware problem, and our mesh Wi-Fi guide is the next step.

1. Move the router. Really.

Most routers live where the cable enters the house. That is a decision made by an installer for their own convenience, and it is very often the worst possible spot: a corner of the building, at floor level, inside a cupboard, behind a television.

A router broadcasts roughly spherically. Put it in a corner and you are heating your neighbour's garden with half of it.

What actually helps:

Get it central. Not "central in the room it's in" but central in the area you want covered. If the house is long, the middle of the house beats the front room.

Get it high. On a shelf, not on the floor. Signal travels down more readily than up, and floor level puts every piece of furniture in the way.

Get it out in the open. A cupboard door, a media unit, and a stack of books all cost you signal. So does the back of a TV, which is both a large metal object and a source of interference.

Keep it away from the kitchen. Microwaves interfere with 2.4GHz directly. Large metal appliances reflect signal. A router on top of the fridge is a common and quietly terrible idea.

If the cable enters somewhere hopeless, a longer cable from the wall socket to a better router position is one of the cheapest upgrades available.

2. Work out what's actually in the way

Distance matters far less than what the signal has to pass through. In rough order of how badly they hurt:

Concrete, brick, and stone absorb a lot, and they are the reason older European housing needs more hardware than a timber-frame build of the same size. A single solid wall can cost you more than three plasterboard ones.

Metal is the worst of all, because it reflects rather than absorbs. Foil-backed insulation, which is common in modern builds and in loft conversions, can turn a room into a near-perfect Wi-Fi cage. So can a large mirror, which is glass over a metal backing. If one room is inexplicably dreadful and the rest of the house is fine, look for foil insulation or a big mirror on the wall facing the router.

Water, which means fish tanks, boilers, and to a surprising degree people. A room that works fine when empty and struggles when full of guests is not imagining it.

Underfloor heating and wire mesh in floors will block signal between storeys, which is why a node per floor is standard advice.

Trace a straight line from the router to the dead zone and ask what it goes through. The fix is often to move the router a metre to the left so the path avoids the chimney breast.

3. Split your bands, or don't

Your router broadcasts on 2.4GHz and 5GHz, and possibly 6GHz. They behave differently in a way that matters here.

2.4GHz travels further and penetrates walls better. It is also slower and far more congested, because every neighbour and every microwave is on it.

5GHz and 6GHz are much faster but much worse through obstacles. They are excellent in the same room and poor two walls away.

Most routers present these as one network and decide for you, which is usually right. But if a specific device in a far room keeps struggling, forcing it onto 2.4GHz can turn "unusable" into "fine". Slow and connected beats fast and dropped.

This is also why cheap dual-band kit sometimes outperforms expensive kit in an old house: it isn't better, it's just using the band that gets through the wall.

4. Change the channel

If you live in a flat or a terrace, you are sharing the airwaves with everyone around you, and on 2.4GHz there are very few non-overlapping channels. Routers pick automatically and often pick badly, then never reconsider.

A Wi-Fi analyser app on your phone will show you which channels your neighbours are crowding. Move to a quieter one in the router's settings. This is free, takes five minutes, and in a dense building it can be the whole fix.

The 5GHz and 6GHz bands are far less crowded, which is another argument for getting devices onto them where the walls allow it.

5. Try an extender before you try mesh

A basic extender rebroadcasts what it receives. That leads to the single most common mistake: people put the extender in the dead zone, where it dutifully picks up a terrible signal and rebroadcasts it, faithfully, as a terrible signal.

An extender belongs roughly halfway between the router and the dead zone, somewhere the signal is still healthy. Placed correctly they are a cheap and legitimate fix for one awkward room.

Their limits are real. They typically halve throughput, because they receive and retransmit on the same radio. They often create a second network name you have to switch between manually. They're a patch, and for one stubborn back bedroom, a patch is often all you need.

6. Now, and only now, consider mesh

If the router is in a good place, the obstacles are understood, the channel is clear, and you still cannot cover the house, you have a genuine coverage problem and mesh is the right answer. Multiple broadcast points, one network name, and devices handed between them as you move.

That's the point at which spending money actually buys you something, and our mesh guide for large homes covers which system to pick and how many nodes you'll need. Two things worth carrying over from it: buy by walls rather than by advertised square footage, and if you can run an Ethernet cable between the nodes, do, because a wired backhaul beats every wireless one.

The honest summary

Dead zones feel like a hardware failure and usually aren't. A router moved out of a cupboard, put on a shelf, and shifted two metres towards the centre of the house will fix more problems than most upgrades, and it costs nothing at all.

Do the free things first. If they work, you've saved the price of a mesh system. If they don't, you now know exactly what you're buying and why, which is a much better position than guessing.