Here’s an uncomfortable truth about smart homes: when one goes wrong, it’s almost never the automation that failed. It’s the network underneath it.
Cameras that drop out in bad weather. A touchscreen that spins loading. Music that stutters in the back bedroom. Video calls that fall over every time someone walks past the study. In nearly every case, the diagnosis is the same — a house full of premium technology running on the modem the internet provider posted out.
If you’re building a smart home, the network isn’t one of the systems. It’s the foundation all of them stand on. Here’s how to get it right.
Not sure where the network fits? Read the smart home beginner’s guide first.
Why one router can’t cover a Sydney home
Wi-Fi is radio, and radio has a range. Two things in Sydney housing stock cut that range dramatically.
Construction. Double brick, rendered masonry, concrete slabs between levels and foil-backed insulation all attenuate wireless signal heavily. A signal that would happily cross 20 metres of open plan might not survive two internal brick walls.
Frequency. The faster bands are the ones that travel worst. 2.4 GHz travels furthest but is slow and congested. 5 GHz is much faster and travels less well. 6 GHz — the band Wi-Fi 6E and Wi-Fi 7 use — is faster again and has the shortest range of all.
So the exact bands that deliver the speeds people are buying routers for are the bands least able to reach the other end of the house. No single device solves this, no matter what’s printed on the box.
Mesh — what it is, and the mistake almost everyone makes
Mesh networking means multiple access points working together as one network, with a single name, handing devices between them as you move around the house.
That’s the right architecture. But there are two ways to build it, and the difference is enormous.
Wireless backhaul — the nodes talk to each other over Wi-Fi. This is what the boxed kits from the electronics store do. It works in a small, open, single-level home. In a Sydney double-brick house it fails, because each node loses a large share of its throughput relaying to the next one — and the further apart they are, the worse the link they’re relaying over.
Wired backhaul — each access point has its own Ethernet cable back to a central switch. Every AP gets full speed. Nothing is relayed. Coverage is determined by where you put the APs, not by whether they can hear each other.
This is the single most important networking decision in a smart home. Wired backhaul mesh is not a slightly better version of wireless mesh. It’s a different class of result.
What a proper home network looks like
A central rack. One location — a cupboard, a plant room, the garage — where the NBN connection, router, switch, patch panel and any recording equipment live. Ventilated, in the building envelope, and not in a garden shed.
Cat6A to everything. Every access point, camera, TV, touchscreen, control processor and desk position gets its own cable back to the rack. Cat6A supports 10 Gb, runs PoE comfortably, and will outlive several generations of the equipment plugged into it.
PoE (Power over Ethernet). Access points and cameras take power over the same cable as data. No powerpoint needed at the ceiling, and a single UPS at the rack keeps the whole network and camera system alive through a blackout.
Access points on ceilings. Not on shelves, not in cupboards. A ceiling-mounted AP radiates down and out through the level it’s on. An AP hidden behind a TV is broadcasting into a wall.
VLANs — separated networks. This one is invisible and matters more than people realise. Your cameras, automation controllers, guest devices and family laptops should be on separate network segments. If a cheap smart device is compromised, it shouldn’t be able to see your work laptop. If a guest’s phone is misbehaving, it shouldn’t affect the lighting system.
How many access points? As a working rule: one per level, plus one per detached structure, plus one for any area separated by more than two masonry walls. A three-level terrace typically needs three. A large Mosman home with a studio and pool cabana commonly needs six to eight. Coverage is driven by construction and floor plan, not floor area.
Wi-Fi 7 in Australia — what’s actually true
Wi-Fi 7 is genuinely a significant step forward. Two things about it in the Australian context are worth knowing before you pay for it.
We only have part of the 6 GHz band. Under ACMA’s class licence arrangements, indoor Wi-Fi 6E and Wi-Fi 7 in Australia operate in the lower 6 GHz — 5925 to 6425 MHz — at low indoor power. The upper portion of the band that some overseas marketing assumes has not been released here, and remains subject to consultation. So Australian Wi-Fi 7 has less 6 GHz spectrum to work with than the headline specifications imply.
Your internet connection is almost certainly not the bottleneck. Wi-Fi 7 quotes multi-gigabit numbers. Most Sydney homes are on an NBN plan delivering somewhere between 50 Mbps and 1 Gbps. Faster Wi-Fi improves what happens inside the house — file transfers, local streaming, camera traffic — and does nothing for your download speed if the wireless was already faster than the connection.
The honest advice: Wi-Fi 7 is worth specifying on new installs because it’s what current professional hardware ships with, and the multi-link operation genuinely improves reliability in congested environments. It is not worth ripping out a well-designed Wi-Fi 6 network for. Cable placement will always matter more than the standard printed on the box.
The things that actually break networks
Ranked by how often we see them:
- Wireless backhaul through masonry. The number one cause of “the internet is slow upstairs”.
- Access points in cupboards. A closed cabinet is a Faraday-ish box. Signal doesn’t recover.
- Cameras on Wi-Fi. Cameras are constant-bitrate uplink traffic — the worst possible use of wireless capacity, and the first thing to drop in bad weather. Hardwire them.
- Everything on one flat network. No segmentation means one misbehaving device can degrade everything.
- The ISP’s supplied router doing everything. Fine for a two-bedroom apartment. Not a smart home platform.
- No UPS. A brief power blip reboots the router, the switch and the controller, and the house takes four minutes to come back.
What drives the cost
Cabling access, more than anything else. Running Cat6A while walls are open is inexpensive. Running it afterwards through finished double brick is the bulk of the cost on a retrofit, and it’s why the same network specification can vary enormously between two similar-looking houses.
After that: access point count — driven by construction and floor plan rather than floor area — whether detached structures need to be reached, and whether you want UPS backup and redundancy at the rack.
The network is also the one system we’d argue against economising on. It’s the foundation every other system stands on, and it’s the cheapest thing in the house to over-specify at rough-in.
The one thing to do before your renovation
Run more cable than you need.
Cat6A costs a few dollars a metre at rough-in. Every position you cable now — ceiling points for future access points, the corners of the house for cameras, behind every TV, the garage for an EV charger, the plant room, the studio — is a position you can activate later for the cost of a plug and a device.
Every position you don’t cable is a wall you’ll be opening in five years, or a device that ends up on wireless because running cable became too hard.
There is no smart home decision with a better return than a spare conduit.
Frequently asked questions
Do I need mesh Wi-Fi in my home?
If your home is larger than a small apartment, or built from brick, concrete or with multiple levels, then yes — you need multiple access points working as one network. What matters is that they’re connected back to a central switch with Ethernet rather than relaying to each other wirelessly.
What’s the difference between mesh Wi-Fi and access points?
Modern professional access points are a mesh — they share one network name and hand devices between them seamlessly. The meaningful difference isn’t the label, it’s the backhaul: consumer mesh kits usually relay wirelessly, while professional access points are wired back to a switch and each deliver full speed.
Is Wi-Fi 7 worth it in Australia?
On a new installation, yes — it’s what current professional hardware ships with and it handles congestion better. But note that Australian indoor Wi-Fi 6E/7 is limited to the lower 6 GHz band (5925–6425 MHz) under ACMA’s arrangements, so real-world performance is below what overseas marketing implies. It’s not a reason to replace a well-designed Wi-Fi 6 network.
Should smart home cameras be on Wi-Fi?
No. Cameras generate constant upload traffic and are the first devices to drop when wireless conditions degrade — which tends to be exactly when you want footage. Cameras should be hardwired with PoE, which also gives them power and UPS backup from the rack.
How many Wi-Fi access points does a house need?
One per level, plus one per detached structure, plus one for any area separated by more than two masonry walls. Typically three for a terrace, four to six for a family home, six to eight for a large home with outbuildings. Construction matters more than floor area.
Can you install a proper home network without opening the walls?
Often, yes — using roof spaces, subfloors, existing conduits and external runs. It takes longer and costs more than cabling during a renovation, but it’s usually achievable. The compromise position is hardwiring the access points and cameras and leaving smaller devices on wireless.
Related reading
- What Is a Smart Home? A Beginner’s Guide for Sydney Homeowners
- Smart Home Security Installation for Northern Beaches Homes
- Smart Home Automation on the Lower North Shore
Build the foundation first
We design and install structured cabling, enterprise Wi-Fi and segmented home networks across Sydney’s Northern Beaches, Eastern Suburbs, North Shore and Northern Suburbs — the layer everything else in your smart home depends on.
Sam Doolan · 0479 122 450 · sam@hyperautomation.com.au