MESH WI-FI
SYDNEY

A regular router broadcasts a single Wi-Fi signal from one location. As you move away from it, signal strength reduces. Where the signal becomes too weak, you get a dead zone. A Wi-Fi extender picks up that signal and rebroadcasts it — but it creates a separate network with a different name, your devices do not automatically roam between them, and extenders typically halve bandwidth because they must receive and retransmit on the same channel.

A mesh Wi-Fi system uses multiple nodes — typically two to four — that all broadcast the same network name (SSID) and use intelligent protocols to hand your device off to the closest, strongest node as you move through the property, without you noticing. Done correctly, mesh Wi-Fi delivers consistent signal strength throughout the entire building — not just near the router. The key word is "correctly" — mesh systems still require the right number of nodes, placed in the right positions, with the right backhaul configuration. A mesh system set up incorrectly will underperform a single router.

The correct number depends on floor area, number of levels, wall construction materials, building layout, and whether nodes will use wired ethernet backhaul or wireless backhaul. Product packaging often states that a two-node system covers a certain square meterage — but those figures are measured in open-space conditions, not concrete or brick homes.

A standard single-storey brick home of around 200 square metres might need two or three nodes. A double-storey home with a concrete slab between levels may need three or four, depending on layout. A multi-level commercial office with glass partitions and high device density is different again. We do not estimate based on floor area alone. We measure your actual property, take signal readings throughout every zone, and specify the correct number of nodes and their exact placement based on real data from your specific building.

Yes — wired ethernet backhaul is significantly better in most cases. When mesh nodes communicate with each other wirelessly (wireless backhaul), they consume a portion of the available wireless bandwidth on the backhaul band just to carry traffic between nodes. This leaves less bandwidth available for your devices. In buildings with thick walls or poor inter-node signal, wireless backhaul can reduce throughput dramatically.

With wired ethernet backhaul, each node is connected directly to the router (or to each other in a daisy chain) via ethernet cable. The backhaul connection is reliable, high-speed, and doesn't consume any wireless spectrum. For most multi-storey homes, apartments in concrete buildings, and any property where the inter-node wireless signal path is poor, wired ethernet backhaul is the right choice. Whether cabling is needed is one of the key things we assess and specify in the written quote after the inspection.

App status showing "all nodes connected" only tells you that the nodes are communicating with each other — it says nothing about signal quality, throughput, or whether coverage is actually reaching the areas where your devices are. A node can be "connected" to the mesh while providing −85 dBm signal to your devices, which is effectively unusable.

Common causes of dropouts despite connected nodes include: nodes placed too far apart with poor wireless backhaul signal between them, your ISP modem running in routing mode (causing double NAT conflicts), channel congestion from neighbouring networks on the same frequencies, and a primary node positioned in a location that blocks its backhaul signal to secondary nodes. The mesh management app is a status dashboard, not a diagnostic tool. A professional network analyser measures what the app cannot — the actual signal strength at the points where your devices are trying to connect.

Generally, no. Most mesh systems are proprietary — the seamless roaming and backhaul protocols are specific to a single brand's ecosystem and often to a specific generation within that brand. Mixing nodes from different brands will result in two separate networks that your devices treat as different Wi-Fi points, not a seamless mesh. You lose the intelligent handoff that makes mesh Wi-Fi work.

Mixing generations within the same brand is sometimes supported but often results in the entire system operating at the performance level of the oldest node — negating the benefit of upgrading some nodes. We recommend against mixing nodes from different brands or generations. If you are expanding an existing mesh system, we will assess compatibility and advise whether the existing equipment should be replaced entirely or whether additional matching nodes can be added.

This is a classic symptom of nodes placed too far apart relative to the building construction between them. When you are near a node, it delivers strong signal. As you move to the midpoint between two nodes, you are at the weakest point in both nodes' coverage areas — your device is connected to whichever node it first associated with, and that node's signal may now be marginal where you are standing.

The solution is not always to add another node — it may be that the existing nodes need to be repositioned closer together, or that the wall or floor construction between them requires wired ethernet backhaul rather than wireless. Adding another node in the wrong position can actually make this worse by introducing a third handoff point that your device's roaming algorithm gets confused by. The right fix depends on a measurement-based assessment of your specific building — which is what the inspection provides.

Most mesh systems are designed to replace your existing router — one of the mesh nodes takes on the router role and connects directly to your modem. Your existing router should be removed from the network or disabled. Leaving it active while the mesh system also handles routing creates a double NAT situation — both devices are performing network address translation, which causes routing conflicts, slower throughput, and unpredictable handoff behaviour between nodes.

Your ISP-supplied modem (the box that connects to the NBN) should be configured in bridge mode so it passes the internet connection directly to the mesh router node without any additional routing layer. ISP modems are often left in routing mode by default — this is one of the most common causes of mesh Wi-Fi problems we find at inspection. Configuring bridge mode correctly is part of what we do during the installation.

NAT stands for Network Address Translation — it's the process your router uses to manage communication between your internal network and the internet. Double NAT occurs when two devices on your network are both performing this routing function simultaneously — typically your ISP modem and your mesh router node.

When both devices are routing, data traversing your network has to be translated twice, which adds latency and can cause issues with certain applications, gaming, VoIP calls, and network-connected devices that rely on consistent IP addressing. It can also cause problems with the mesh system's own node-to-node communication protocols, leading to unstable handoff between nodes and intermittent drop-outs. The fix is to put the ISP modem in bridge mode, which disables its routing function and allows the mesh router node to handle all routing cleanly. We check and configure this as part of every mesh Wi-Fi installation. Call us on 02 9188 1577 or book an inspection online.