What causes weak Wi-Fi signal at home?

Walls, floors, and large appliances block Wi-Fi signals. The thicker or denser the material, concrete and brick in particular, the greater the signal loss. It's vital that you learn how to improve Wi-Fi signal if you want to maintain your connection. To improve Wi-Fi signal, it helps to learn about what a Wi-Fi signal booster does and the causes of poor Wi-Fi.

Your router's position matters more than most people realise. A router tucked away will create weak spots in the rooms furthest from it and interrupt your internet connection. Thick walls can do the same thing, and dead spots interfere with connected devices.

Other common causes include:

• Microwave ovens and cordless phones operating on the 2.4GHz band, the same frequency as many routers
• Neighbouring Wi-Fi networks creating channel congestion in apartments and townhouses
• An ageing router with outdated hardware that can no longer cover modern homes with multiple devices
• Too many devices connected simultaneously, reducing available bandwidth per device

If your home has consistent dead zones in the same spots, the cause is almost always physical distance or obstruction. If the problem is sporadic, interference is more likely. Finding the best Wi-Fi extender Australia has to offer is one of the best things you can do to fix it.

How to fix a Wi-Fi dead zone: Six proven methods

Start with the free fixes first. Most dead zone problems can be solved without buying anything. You already know what causes Wi-Fi dead zones, and the next thing to do is learn how do I fix my Wi-Fi signal.

Move your router to a central location

This is the single most effective fix for most homes. Place your router at the centre of your home, at bench or shelf height, away from walls and metal objects. Avoid cupboards, floors, and spots near microwaves or baby monitors. A router positioned centrally typically doubles the effective coverage area compared to one pushed to a corner.

Check and update your router's firmware

Router manufacturers release firmware updates that improve performance and fix signal issues. Log into your router's admin panel (usually via 192.168.0.1 or 192.168.1.1 in your browser) and check for updates. If your router is more than five years old, an upgrade is likely more cost-effective than troubleshooting.

Change your Wi-Fi channel or band

Most modern routers broadcast on both 2.4GHz and 5GHz bands. The 5GHz band is faster but has shorter range. For devices further away, 2.4GHz penetrates walls better.

You can use a free app like Wi-Fi Analyser (Android) to check which channels your neighbours are using. From here, you can switch to a less congested one.

Use a Wi-Fi extender or signal booster

A Wi-Fi extender picks up your router's signal and rebroadcasts it. It extends coverage into rooms the router cannot reach. Place it halfway between your router and the dead zone. For a full comparison of options available in Australia, see our guide to the best Wi-Fi extenders.

Switch to a mesh Wi-Fi system

A mesh system replaces your router with two or three interconnected nodes that work as a single seamless network.

Unlike extenders, mesh nodes communicate with each other on a dedicated backhaul channel. So, devices roam between nodes without dropping connection. Tangerine offers pre-configured mesh bundles as an optional add-on when you sign up for a nbn® plan.

Review your nbn® plan speed

Sometimes the problem is not your Wi-Fi hardware but your plan. Your wireless network should fit your household. If multiple people are streaming, gaming, and video calling simultaneously, a slower plan will struggle regardless of your router. Use our nbn® speed guide to find the right tier, then compare plans at your address.

When to replace your router instead of fixing the dead zone

If your router is more than five years old, repositioning and extenders may not deliver meaningful improvement. Modern wireless routers offer significantly better range, speed, and multi-device handling. Signs it is time to replace:

Check your address for better nbn® plans

Improving your Wi‑Fi hardware helps. But if your nbn® plan is too slow for your household, you may still see buffering. You may also notice slowdowns. Use Compare Broadband's plan checker to see which providers and speeds are available at your address.

Check nbn® plans at your address