Slow WiFi in certain rooms is one of the most common frustrations for NZ homeowners. Whether it's a dead zone in the back bedroom, buffering in the lounge, or a weak signal in the home office - the good news is that poor coverage is fixable. This guide walks through the practical steps to improve your WiFi signal, from the no-cost fixes to equipment upgrades that make a real difference.

Router Placement: The Free Fix Most People Skip

The fastest way to improve your WiFi coverage costs nothing. Router placement has a dramatic effect on signal strength, yet most routers end up tucked away wherever the ISP technician installed them - usually near the front door, in a corner, or inside a cupboard.

Your router broadcasts signal in all directions. Placing it in a central, elevated location gives every room a more even signal rather than pushing most of the coverage towards one end of the house. A shelf in a hallway, living area, or study works well. Avoid corners, enclosed spaces, thick concrete or brick walls, and areas near appliances that emit radio frequency interference - microwaves, cordless phones, and baby monitors all operate on the 2.4GHz band and can degrade WiFi performance.

Before spending anything, try repositioning your router first. For many homes, this alone solves the problem.

Reduce Interference and Channel Congestion

In suburban areas, neighbouring WiFi networks compete for the same wireless channels. If your router is set to automatically select channels, this is usually handled well - but it's worth confirming automatic channel selection is enabled in your router's admin panel.

If you're comfortable with router settings, manually selecting a less congested channel on the 2.4GHz or 5GHz band can improve throughput. Free tools like WiFi Analyzer (Android) or the built-in wireless diagnostics on macOS let you see which channels nearby networks are using, so you can pick a quieter one.

According to the Wi-Fi Alliance, WiFi 6 introduces OFDMA technology that significantly reduces channel congestion in dense environments - one of the key reasons upgrading to a WiFi 6 router helps in busy NZ households.

Check Your Router's Age and Standard

If your router is more than four or five years old, it's likely holding back your speeds regardless of your broadband plan. Older routers use WiFi 5 (802.11ac) or earlier standards, which have lower maximum throughput and less efficient handling of multiple connected devices.

WiFi 6 (802.11ax) offers better range, higher throughput, and improved performance in homes with 10 or more connected devices running simultaneously. If your household runs smart TVs, gaming consoles, laptops, tablets, and smart home devices all at once, a WiFi 6 router makes a tangible difference.

The TP-Link AX1500 Wi-Fi 6 Router is a straightforward upgrade at an accessible price point, suitable for most standard NZ homes. For larger homes or heavier usage, the NETGEAR Nighthawk RAX70 Tri-band AX6600 handles multiple simultaneous data streams without the slowdowns that older single-band and dual-band routers show under load.

WiFi Extenders for Targeted Dead Zones

If you have one or two specific problem areas - a back bedroom, a detached garage, or a room on the far side of the house - a WiFi range extender is the most affordable targeted fix. Extenders receive your router's existing signal and rebroadcast it into the area that's out of range.

Placement is the critical variable. The extender needs to sit within a reliable signal range of your router - not in the dead zone itself. A midpoint location such as a hallway power point usually works well. Place it too close to the dead zone and it has nothing useful to rebroadcast; place it too close to the router and it doesn't extend coverage where you need it.

One limitation worth knowing: most extenders create a separate network name (SSID) rather than extending your existing one seamlessly. Your devices may not automatically switch between the two as you move around. This is manageable in most setups but is worth understanding before you purchase.

Mesh Systems for Whole-Home Coverage

For larger homes, multi-storey layouts, or properties with thick walls, a mesh WiFi system is the most effective long-term solution. Mesh systems use multiple nodes placed throughout the home that communicate with each other to create a single unified network. Your devices connect to whichever node gives the strongest signal, and the handoff as you move between rooms is seamless - unlike extenders, which often require manually reconnecting to a different network.

The Vilo 6 Mesh Wi-Fi 6 System (2-Pack) offers whole-home coverage with WiFi 6 performance in a straightforward plug-and-play setup - a cost-effective entry point for households that want mesh coverage without the premium price of flagship systems. For more on the underlying technology, our article on Understanding WiFi 6 covers what to look for when comparing specifications.

Check Your Wired Backbone

Sometimes slow speeds are not a WiFi problem at all. If your router is connected to your modem via an old or damaged ethernet cable, or if your ISP-supplied modem is underperforming, your speeds will be capped before the signal even reaches your wireless devices.

A quick diagnostic: run a speed test via a device plugged directly into your router with an ethernet cable. If those wired speeds are also slow, the bottleneck is upstream of your WiFi - and no router upgrade will fix it. Contact your ISP to investigate line quality and modem performance before investing in new wireless hardware. If your wired speeds are fine but WiFi is slow, the problem is definitively in your wireless setup and the solutions above apply.

Shop Networking Gear at Tech Supply Shed NZ

Whether you need a router upgrade, a range extender, or a full mesh system, browse the complete range in our Networking collection. We stock TP-Link, NETGEAR, Vilo, Grandstream, Ubiquiti, and more - all available online with NZ delivery. Not sure which solution suits your home layout? Get in touch and we'll help you work it out.