Why the Room Furthest From the Router Is Always the Worst

Every house has one. The back bedroom, the study at the end of the hall, the granny flat, the room where video calls go to die.

It is never random. It is physics, and once you understand what is happening the fix becomes obvious.

What is actually happening to the signal

WiFi is a radio signal. It gets weaker with distance, and it gets weaker again every time it passes through something solid.

Plasterboard barely slows it down. Timber is fine. Brick takes a real bite out of it. Double brick, concrete, tiled bathrooms, mirrors and metal appliances take a serious bite. Stack three or four of those between your router and your phone and there is very little left by the time it arrives.

This is why the far room problem is so much worse in older homes. A modern build with lightweight internal walls lets the signal through. A solidly built older home does not. Same router, same plan, completely different result.

There is a second thing happening as well. When your phone finally does connect at the edge of range, it drops to a slower connection speed to stay connected at all. So it is not just weak, it is genuinely slower. Then it holds onto that weak connection stubbornly even when you walk back toward the router, because devices are reluctant to let go.

Why moving the router helps less than you would think

The standard advice is to put the router in the centre of the house. It is good advice and it does help.

The problem is that most people cannot. The router lives where the connection point is, and that is usually in a hallway cupboard, the garage or a corner of the lounge room, because that is where the cable enters the building. Moving it means relocating that connection point.

Even when you can move it, centring the router in a large or solidly built home just means everything is moderately weak instead of one end being strong and the other being useless. You have spread the problem, not solved it.

Extenders, and why they disappoint people

A plug-in extender picks up your WiFi signal and rebroadcasts it. In theory that pushes coverage further into the house.

In practice, an extender can only rebroadcast what it receives. Put it in the far room where the signal is already weak and it will faithfully rebroadcast a weak signal. Put it halfway, where the signal is still strong, and it may not reach far enough to help the room you bought it for.

They also halve throughput on most setups, because the same radio is talking to your device and back to the router at the same time.

Extenders are not useless. They are just a compromise, and people buy them expecting a solution.

What actually works

The reliable answer is more than one signal source, each with a proper connection back to the modem.

That means running a cable to a second point in the house and putting an access point there. It now broadcasts at full strength from a spot that is genuinely close to the problem area, rather than relaying a tired signal from the other end of the building.

Proper network data cabling is often the foundation of this setup, particularly when you need reliable connectivity between multiple access points.

Two well-placed access points on cable will beat five extenders every time. In most homes you only need one or two extra points, and cabling can usually be run through roof spaces, under floors or along existing service paths without opening up walls.

If cabling genuinely is not possible, there are wireless options worth discussing, but the wired approach is the one that holds up over time.

Where to start

Work out how many rooms actually have the problem, and whether it is one dead spot or general weakness across half the house. One is a placement issue. The other is a coverage design issue.

From there, fixing dead zones and whole-home WiFi are two different jobs with different answers, and it is worth knowing which one you have before buying anything.

Written by Yariv, Owner and Lead Installer at AVsion. 14 years installing AV, WiFi and security systems across Sydney’s eastern suburbs. ACRS Master Cabler A036841.

Frequently asked questions

Why is my WiFi weak in the back of the house?

Distance and building materials. WiFi is a radio signal that loses strength every time it passes through a wall, and solid brick, concrete and tiled areas absorb far more of it than plasterboard. By the time the signal reaches the far end of the house it may be too weak to be useful. Devices at the edge of range also drop to slower connection speeds to stay connected, so the room feels doubly slow.

Will a WiFi extender fix my dead zone?

Sometimes, but they often disappoint. An extender can only rebroadcast the signal it receives, so placing it in the weak area simply rebroadcasts a weak signal. Most extenders also reduce throughput because the same radio handles both directions of traffic. They can help in smaller homes with a single mild dead spot. For larger or solidly built homes, a wired access point delivers a much better result.

Is it better to move my router or add another access point?

Moving the router helps if it is currently in a corner or inside a cupboard, but the router usually has to stay near where the connection enters the building. In larger homes, centring it just spreads the weakness around rather than solving it. Adding a second access point connected by cable gives you a full strength signal starting close to the problem area, which is far more effective.

How many access points does a house need?

Most homes need one or two in addition to the main router. It depends on floor area, the number of levels, and what the walls are made of. A single storey home with lightweight internal walls may need nothing extra. A two storey brick home with a studio out the back may need two. We assess the layout and construction rather than working from floor area alone.

Can you run network cabling without damaging walls?

In most homes, yes. Cabling can usually be run through roof spaces, under floors, or along existing service paths, with only small access points needed at each end. Older homes and slab-on-ground builds can be more restrictive, which is why we look at the property first and explain what is realistic before any work starts. Cabling connected to the telecommunications network is carried out under our ACRS Master Cabler registration.

Why does my phone stay on weak WiFi even when I walk closer to the router?

Devices tend to hold onto a connection until it becomes unusable rather than switching to a stronger one nearby. This is normal behaviour and it is why people often experience poor performance even in reasonable coverage. A properly configured multi-point network handles this far better, because the network guides devices onto the best available connection instead of leaving them stuck.