Office Wi-Fi not working? How to fix business Wi-Fi for good

Slow, patchy office Wi-Fi is one of the most common complaints we hear. Video calls freeze in the meeting room, the app drops calls at the back of the office, and someone always ends up working next to the router. The good news is that the causes are usually predictable, and so are the fixes.

First: is it the Wi-Fi or the broadband?

Before blaming the Wi-Fi, check the connection coming into the building. Ofcom makes the point clearly: however good your Wi-Fi is, it will never outperform your broadband service (Ofcom).

A quick test: plug a laptop into the router with a cable and run a speed test, then do the same over Wi-Fi in a problem area. If the wired speed is poor as well, the bottleneck is your business broadband, and no amount of Wi-Fi kit will fix it. If the wired speed is fine and the Wi-Fi isn't, read on.

The six most common causes of poor office Wi-Fi

1. One router trying to cover the whole building

The router your broadband provider sent was designed to sit in a home. In most business premises, one box in a corner can't cover every room, especially across floors.

2. Walls, glass and metal

Wi-Fi signals weaken as they pass through objects. Ofcom notes that brick walls, water, metal and glass all block the signal (Ofcom). Office buildings are full of exactly these: brick and block walls, glass partitions, metal shelving and lift shafts.

3. The router is in the wrong place

Routers often end up wherever the line comes in: on the floor, in a cupboard or behind a cabinet. Ofcom recommends placing a router centrally and off the floor, away from objects like radiators, and away from other electrical equipment that can interfere.

4. Too many devices

Every laptop, phone, tablet, printer and smart device shares the Wi-Fi. Ofcom points out that bandwidth is shared between devices, so the more you connect, the less each one gets. A busy office can easily outgrow consumer-grade equipment.

5. Old equipment

Older routers and devices only support older Wi-Fi standards. Newer routers can often support more connected devices and give better coverage and speeds (Ofcom).

6. Extenders and repeaters

Plug-in boosters can extend coverage, but Ofcom notes that, unlike mesh systems, they can affect data speeds and how responsive the connection feels. In an office they often create as many problems as they solve, particularly for calls.

Quick fixes you can try today

Move the router somewhere central and off the floor, away from metal and radiators.

Restart the router and check for firmware updates.

Plug desk computers in with a network cable where you can. Ofcom notes that cables often give a better connection than Wi-Fi.

Move guests and personal devices onto a separate guest network if you have one.

Check that the slow spots aren't simply the furthest point from the router.

These can help in a small office. In most businesses, though, the real fix is better design.

The proper fix: designed business Wi-Fi

Multiple access points, placed with a plan

Business Wi-Fi uses several access points, usually mounted on ceilings or high on walls, each covering part of the building. Devices move between them as people walk around. The key is where they go, which depends on your layout, walls and how each area is used. A meeting room full of laptops needs more capacity than a corridor.

Cabled back properly

Each access point should be connected to the network with a proper cable, not relying on a wireless hop from the next one. That means good data cabling behind the Wi-Fi. It's one of the main differences between business Wi-Fi and a home mesh kit.

Separate networks for staff and guests

A guest network keeps visitors' devices away from your business systems and stops guest use from slowing your team down.

Business-grade, centrally managed equipment

We install Ubiquiti business Wi-Fi equipment, where all the access points are managed from one place. Adding coverage later is straightforward.

Outdoor areas and separate buildings

Courtyards, yards and car parks can be covered with weather-resistant outdoor access points. Separate buildings on the same site can be linked with a point-to-point wireless link, without digging trenches for cable.

Why Wi-Fi matters for your phones

If your team takes calls on a softphone app or Microsoft Teams, Wi-Fi quality is call quality. Choppy calls on a cloud phone system are very often a Wi-Fi or network problem, not the phone system. It's one reason we plan phones, Wi-Fi and cabling together.

When to call in a professional

Problems persist after the quick fixes

You have more than one floor, or thick internal walls

You need Wi-Fi outdoors or across more than one building

You're moving office or refitting

Calls on apps or Teams keep dropping

Frequently asked questions

Why is my office Wi-Fi slow in some rooms and fine in others?

Usually it's distance from the router, walls or glass in the way, or too few access points. One router rarely covers a whole business premises.

Will a Wi-Fi extender fix it?

Sometimes, in a small space. But Ofcom notes that extenders can affect speeds and responsiveness. In offices, properly cabled access points are usually the better fix.

Is mesh Wi-Fi good enough for a business?

It can suit a very small office. Larger or busier premises benefit from business-grade access points, cabled back and managed centrally.

Do I need faster broadband or better Wi-Fi?

Test with a cable plugged into the router. If the wired speed is slow too, it's the broadband. If it's fast, it's the Wi-Fi.

Can visitors have separate Wi-Fi?

Yes. A guest network keeps visitors off your business network.

Get your Wi-Fi sorted

Crystal Voice Data designs and installs business Wi-Fi in Cardiff and across South Wales: indoor, outdoor and point-to-point, on Ubiquiti hardware, with the cabling to back it up. We're local, and there are no call centres. Call 0333 5678 444 (Monday to Friday, 9am to 5pm) or tell us about your building.