Why Is Our Office Wi-Fi Slow or Constantly Disconnecting?

These are two different problems, although they often feel exactly the same to the person using the laptop.

Your broadband connection is the link between your office and the internet. Wi-Fi is simply one way your laptop, phone or tablet reaches that connection.

Imagine the broadband connection as the main road into the office estate and Wi-Fi as the roads around the car park. You can have an excellent main road and a terrible car park.

Likewise, a business can have a fast fibre connection and still experience painfully slow Wi-Fi in parts of the building.

One of the first things worth establishing is whether the same problem exists on a wired connection. If a computer connected by Ethernet performs perfectly while nearby Wi-Fi devices struggle, replacing the broadband service is unlikely to achieve much.

If both wired and wireless devices are slow, the investigation moves further upstream towards the router, firewall, switches or broadband connection.

This catches people out surprisingly often. Seeing full Wi-Fi bars does not guarantee a good connection.

Those bars mostly tell you that your device can hear the access point reasonably well. They do not tell you how busy the wireless channel is, how much interference exists, how many devices are competing for airtime or how efficiently data is moving through the network.

It is perfectly possible to sit beneath an access point with excellent signal strength and still have slow Wi-Fi.

Think of it as standing next to somebody in a crowded room. They are close enough for you to hear them, but if twenty other people are talking at the same time the conversation can still be difficult.

Wi-Fi equipment is frequently installed where it is convenient rather than where it is useful.

Routers and access points often end up inside communications cupboards, under desks, behind filing cabinets, beside large electrical equipment or at one end of a long building because that is where the internet line happened to be installed.

Walls, metalwork, glass, shelving, floors and the structure of the building can all affect radio signals. Ofcom also notes that Wi-Fi can be affected by obstacles and nearby electrical equipment.

This is one reason an office that worked reasonably well with five staff can become frustrating when the business grows into neighbouring rooms. The broadband has not necessarily become worse. The office may simply have outgrown the original Wi-Fi design.

A modern office can have considerably more wireless devices than employees. One person may have a laptop and phone, while meeting-room equipment, printers, televisions, CCTV, building controls and visitor devices add more.

Cloud backups, Windows updates, SharePoint synchronisation, video meetings and large downloads can all create substantial traffic.

The result is that a Wi-Fi network can have apparently good coverage but still run short of capacity.

Meeting rooms expose this particularly well. A room may normally contain two people, then suddenly host a meeting with twelve laptops while several attendees are joining Teams calls. The wireless requirement has changed dramatically even though nobody moved the access point.

Wi-Fi uses shared radio frequencies, so your network does not live in complete isolation.

In a business centre, industrial estate or shared office building, your access points may hear many other wireless networks. The 2.4 GHz band is particularly prone to congestion because relatively little non-overlapping channel space is available.

Cisco's wireless design guidance notes that 2.4 GHz can experience interference from Bluetooth devices, microwave ovens, cordless equipment and neighbouring access points. Modern business networks therefore tend to make greater use of 5 GHz where appropriate.

That does not make 2.4 GHz “bad”. It has useful range and compatibility characteristics. It simply needs to be used deliberately rather than treated as interchangeable with every other band.

One of the great Wi-Fi myths is that poor Wi-Fi plus another access point must equal better Wi-Fi.

Sometimes it does. Sometimes it gives you two badly configured access points interfering with each other instead of one.

Wireless networks need sensible channel planning, transmit power and coverage overlap. Too many access points in a small area can increase contention rather than solve it.

There is another problem: the client device normally decides when to leave one access point and roam to another. A laptop can remain attached to a distant access point even though a much better one is nearby. This is often described as a sticky client.

To the user it looks simple: “I walked from my office to the meeting room and the Wi-Fi stopped working properly.” Behind the scenes, the laptop may still be trying to communicate with the access point back in the original office.

Consumer Wi-Fi extenders are attractive because they are inexpensive and easy to install. For a home, that may be perfectly reasonable.

For a business relying on Teams calls, cloud applications and shared systems throughout the working day, the compromises become more noticeable.

A wireless extender has to receive a wireless signal and retransmit it. You may gain coverage while introducing another wireless hop, extra contention and more complexity.

A properly cabled business access point is usually a cleaner solution. There are circumstances where wireless mesh is appropriate, but it should be a design choice rather than the automatic cure for a dead spot.

Wireless technology develops quickly, but that does not mean every business needs the newest access point every two years.

Age becomes relevant when the equipment no longer matches the environment around it. An older consumer router originally installed for a five-person office may later be supporting twenty employees, Teams meetings, Microsoft 365, guest devices, printers and cloud synchronisation.

At that point the router is not necessarily broken. You may simply be asking it to perform a job it was never designed to do.

Business-grade Wi-Fi platforms also provide something extremely useful when troubleshooting: visibility. Instead of walking around saying “it seems slow over here”, managed equipment can show access point health, connected clients, channel utilisation and other useful information.

This is precisely why diagnosis matters. Symptoms that look like poor Wi-Fi can also be caused by a failing network cable, a faulty switch, router or firewall problems, DNS issues, the internet circuit itself, one problematic laptop, outdated wireless drivers, VPN software or heavy background synchronisation.

If only one employee is affected while everybody around them works normally, rebuilding the entire wireless network would be rather enthusiastic.

Equally, if every device loses internet connectivity at exactly the same moment, investigating individual laptops would probably be the wrong place to begin.

Voice and video expose network problems very quickly. When downloading a document, a brief delay may go completely unnoticed. The file simply takes another second to arrive.

During a live meeting, that same interruption can mean frozen video, robotic audio or a disconnected call. Real-time applications care about more than headline download speed. They need a connection that remains consistent.

That is why an office can pass an internet speed test and still have terrible video meetings. A single impressive Mbps number does not describe the overall quality of the network.

This is another useful clue. If Wi-Fi is excellent at 7:30 in the morning and poor at 10:30, ask what changes between those times.

Perhaps another twenty people arrive. Teams meetings begin. Neighbouring offices become busy. Automated cloud jobs start. A meeting room suddenly contains ten devices. Or electrical equipment is switched on.

Wireless problems are often about patterns. Knowing when and where the issue occurs can tell an engineer considerably more than simply hearing that “the internet is slow”.

You do not need specialist equipment to collect some very useful information.

Ofcom also recommends comparing Wi-Fi with a wired connection where possible, keeping equipment sensibly positioned and away from likely sources of interference.

Restarting the router is a perfectly reasonable basic check. But if the problem returns every few days, repeatedly restarting equipment is treating the symptom rather than finding the cause.

We normally want to understand the complete path rather than immediately replacing hardware.

Only after understanding those things does replacing equipment become a useful conversation. Sometimes the correct recommendation is a new network. Sometimes an access point needs moving a few metres. There is quite a difference in price between the two.

Rather uneventful. That is usually the sign of a good network.

Staff should be able to open their laptops and work without thinking about which access point they are connected to. Moving between areas should not become a technical event. Teams calls should remain stable, and guest devices should have internet access without being unnecessarily mixed into the business network.

When something does go wrong, whoever manages the network should have enough visibility to diagnose it properly.

The objective is not the fastest possible speed-test screenshot. It is a network that remains reliable during a normal working day.

Not necessarily. One of the easiest mistakes in IT is replacing everything because one part of the system is causing trouble.

Existing switches, cabling, access points or firewalls may be perfectly usable. In other cases, a network has grown gradually over many years and contains different generations of routers, switches, extenders and access points with no central management or documentation.

At that point a network refresh can make sense — not because newer equipment is fashionable, but because the existing environment has become difficult to manage reliably.

You can read more about how Liugo approaches business networks and Wi-Fi, or use our Free IT Health Check if you would like a second opinion on the wider setup.