When the internet feels slow, people blame the provider. Often the connection into the building is fine and the problem is how it is shared inside. A router in a corner cannot reach every desk, and walls, floors and other devices get in the way. Here is how to find and fix the usual causes.
Why office Wi-Fi struggles
One router for the whole building
A single router has to cover every room. Signal drops quickly through thick walls, floors and metal. The people closest to it get a strong signal and everyone else gets a weak one.
The router is in the wrong place
Routers are often placed where the cable happens to enter the building, such as a corner, a cupboard or behind a cabinet. A better position is central, open and off the floor.
Too many devices on one connection
Phones, laptops, printers, cameras and visitors all compete. As the numbers grow, a basic home router starts to struggle.
Interference
Neighbouring networks, microwaves and other equipment can crowd the same radio channels, especially on the common 2.4 GHz band.
Old or underpowered equipment
Routers and access points age. Older ones cannot handle many devices or modern speeds.
Everything is on Wi-Fi
Desktops, printers and cameras do not need to be wireless. Running them on cable frees the Wi-Fi for the devices that do.
How to fix it
- Survey the space. Walk the building with a phone or laptop and note where the signal is weak or drops. A proper survey measures this room by room.
- Add access points. Place several access points around the building instead of one strong router. Each one covers its own area, so the signal stays strong everywhere.
- Connect them by cable. Wired links between access points give better performance than wireless relays.
- Position them well. Mount access points high, in open space, away from metal and thick walls, and near where people sit.
- Move heavy and fixed devices to cable. Use network cable for desktops, printers and cameras.
- Choose sensible channels and bands. Let the equipment use the less crowded 5 GHz band where possible, and tune channels if there is a lot of interference.
- Update the equipment. Keep firmware up to date, and replace gear that cannot cope.
Keep staff and guests apart
A guest network keeps visitors off your internal devices and shared files. Staff devices should use a secure network with a strong password, and guests get a separate one with limited access.
- Use strong, unique passwords for each network.
- Change default admin passwords on all equipment.
- Remove access for people who leave.
- Consider limiting what guests can reach and how much bandwidth they use.
Wi-Fi is only as good as the connection behind it
If the connection into the building is slow or unreliable, the best Wi-Fi cannot fix it. Check the line itself, and if you are on a satellite connection, see our Starlink checklist to make sure the dish and router are placed well.
Bigger sites: schools, estates and campuses
Large sites need planning across buildings: links between them, structured cabling, switches and coverage for classrooms, halls and open ground. See our campus networks service. For servers, firewalls and remote access, see servers and security.
When to call a professional
Consider help when you have more than one floor or building, when many people depend on the connection all day, when you handle sensitive data, or when you have tried the simple fixes and the problem remains. A survey and a coverage plan cost less than weeks of lost working time. See our office Wi-Fi service, or get in touch.
Frequently asked questions
Will a more expensive router fix my Wi-Fi?
Not always. If the problem is coverage, more access points in the right places will help more than one powerful router.
What is the difference between a mesh system and access points?
Both add coverage. Access points connected by cable usually perform best, and mesh systems are convenient where cabling is hard. The right choice depends on the building.
Do I need a separate guest network?
It is a good idea. It keeps visitors away from your internal devices and files and lets you control what they can use.
How often should office network equipment be checked?
Regular check-ups, including firmware updates, are a good habit. Many problems can be found and fixed before anyone notices.