You have a decent router. Your internet plan is fast. But the WiFi in your office is slow, drops out, or works fine at one desk and poorly at another. Sound familiar?
The problem is often wireless density, and it’s one of the most misunderstood aspects of office networking.
What Wireless Density Actually Means
Wireless density refers to the number of devices competing for airtime on a wireless network within a given space.
Every device on your WiFi, laptops, phones, tablets, printers, smart TVs, security cameras, thermostats, is constantly communicating with your access point. WiFi is a shared medium, meaning devices take turns. The more devices there are, the more they have to wait.
This is different from your internet speed. You could have a 1 Gbps internet connection and still have a sluggish office network if too many devices are fighting over the same access point.
One Router Is Rarely Enough
A consumer router is designed for a home environment: a handful of devices spread across a few rooms. In an office, the situation is very different.
Consider a typical small business with 10 staff. Each person likely has a laptop, a phone, and possibly a tablet or secondary device. Add shared printers, a network-connected TV for meetings, a couple of IP phones, and maybe a smart thermostat or security camera. You’re quickly looking at 30–40 devices, all connected to a single access point.
That access point has to manage all of that traffic simultaneously. Even if it’s a capable piece of hardware, there are physical and radio limits to what a single device can handle well.
The result is what most people describe as “slow WiFi” even when the internet itself is fast.
How Buildings Make It Worse
Physical obstacles reduce WiFi signal strength and quality. The more walls, floors, and dense materials between a device and an access point, the weaker the connection.
Common culprits include:
- Concrete and brick walls
- Metal shelving or filing cabinets
- Elevator shafts and stairwells
- Older buildings with dense internal walls
A single router placed at one end of an office will deliver excellent signal nearby and poor signal at the far end. Devices at the edge of the coverage area will connect, but at reduced speeds, and they’ll hold onto that weak connection longer than they should, rather than switching to a closer access point.
The Solution: Multiple Access Points
The right approach for most offices is to use multiple access points (APs) strategically placed throughout the space, all connected to the same network.
This distributes the device load across several radios rather than concentrating it on one. It also ensures every area of your office has strong signal, not just the room where the router happens to be.
This is different from WiFi extenders or repeaters, which amplify an existing signal but cut available bandwidth in the process and often create connection handoff problems as you move around. A proper multi-AP deployment uses wired backhaul, each access point connected to your network switch via ethernet, for consistent, reliable performance.
What a Wireless Site Survey Tells You
Before placing access points, a wireless site survey assesses the physical environment and identifies:
- Where signal is strong and where it drops off
- Sources of interference (neighbouring networks, other wireless devices)
- The number and placement of access points needed
- Which WiFi channels are congested in your area
A survey takes the guesswork out of access point placement and prevents the common mistake of buying too few APs, placing them poorly, and ending up with an expensive network that still performs badly.
Signs Your Office Has a Wireless Density Problem
- WiFi works well early in the morning but slows down when everyone arrives
- Video calls drop or degrade in quality during busy periods
- Devices in certain areas consistently get poor signal
- Staff complain about slow WiFi despite a fast internet plan
- Connecting more devices seems to make performance worse for everyone
Any of these is a sign that your wireless infrastructure isn’t keeping up with demand.
How Many Access Points Do You Need?
There’s no universal answer, it depends on your floor plan, construction materials, number of devices, and usage patterns. As a rough guide:
- A small open-plan office (up to ~150 m²) with 10–15 devices: 1–2 access points
- A medium office (150–400 m²) with 20–40 devices: 2–4 access points
- A multi-floor or divided office: at least one AP per floor, possibly more depending on layout
These are starting points. An example of a device dense environment: a boardroom where 15 people all join a video call simultaneously, may need additional coverage even in a small space.