Why Is My Wi-Fi Slow in Some Rooms?

If your internet is fast near the router but unreliable in a bedroom, study or back room, the internet connection itself may not be the problem. More often, the issue is how the Wi-Fi signal is travelling through your home.

Distance is only part of the problem

Wi-Fi loses strength as it travels. Walls, floors, cupboards, appliances and building materials can all reduce the signal. A router placed at one end of the house may simply have too much to get through before it reaches the other end.

Router placement matters more than people expect

A router hidden behind a television, inside a cabinet or down at floor level is starting at a disadvantage. Where possible, it should be reasonably central, elevated and away from large obstructions.

2.4 GHz and 5 GHz behave differently

5 GHz Wi-Fi can provide excellent speed, but generally has less range through walls. 2.4 GHz usually travels further but can be slower and more congested. Modern systems often manage this automatically, but device behaviour and router settings can still affect the result.

Interference can make a strong signal feel bad

Neighbouring Wi-Fi networks, Bluetooth devices and other wireless equipment can compete for airtime. You might see several signal bars while still experiencing slow or inconsistent performance.

When mesh Wi-Fi helps

For larger or awkwardly shaped homes, a properly positioned mesh system can be a good solution. The key word is properly. Adding nodes in poor locations can create another weak link rather than fixing the problem.

What to check before spending money

• Run a speed test close to the router and again in the problem room.
• Check whether the problem affects one device or everything.
• Restart the router if it has not been restarted in a long time.
• Look at the router's location and what is surrounding it.
• Check whether an extender or old mesh unit is actually making things worse.

The best fix depends on the layout of the house, where the internet enters the property and what devices need reliable coverage.

For workplaces and small businesses, see our business Wi-Fi and networking.