Slow wifi is one of those problems everyone blames on their internet provider first — and it’s usually the wrong culprit. More often than not, the connection coming into your house is perfectly fine; what’s slow is the wifi signal getting it around your home.
This guide covers every practical fix, from free changes you can make in five minutes to knowing when it’s genuinely time to upgrade.
Why home wifi slows down
Wifi problems almost always come down to one of these:
- Poor router placement — tucked in a cupboard, behind the TV, or in a corner far from where you actually use it
- Interference from other devices, thick walls, or neighbouring networks competing for the same channel
- An outdated router or firmware that hasn’t been restarted or updated in months
- Too many devices competing for bandwidth at once
- Genuine range limits — a single router simply can’t reach every corner of a larger home
The fixes below are ordered by how much impact they typically have — and most of them cost nothing.
Test your actual speed first
Before changing anything, run a speed test standing right next to the router, then again from the room where wifi feels slow. This tells you immediately whether the problem is your connection or your coverage — if speeds are fine next to the router but drop badly elsewhere, coverage is the issue, not your internet plan.
Quick check: if speed is poor even standing next to the router, contact your internet provider first — no amount of router repositioning fixes a genuinely slow incoming connection.
Move your router High impact
Placement matters more than almost anything else
Wifi signal weakens with distance and is blocked by walls, floors and large appliances. A router hidden in a cupboard, behind the TV, or tucked in a corner will always underperform — regardless of how good the router itself is.
Place it centrally, elevated, and in the open — ideally at head height or higher, away from metal objects, mirrors and thick walls. Even moving a router from a corner to the centre of the house can noticeably improve coverage everywhere.
Reduce interference High impact
Other signals are fighting for the same space
Wifi shares its frequency with cordless phones, microwaves, baby monitors and, in flats especially, your neighbours’ networks all competing on the same channel. Most modern routers select a channel automatically, but in crowded areas it’s worth checking manually.
Log into your router’s settings (usually via a browser at an address printed on the router itself) and look for a wifi channel setting. Switching to a less congested channel, particularly on 2.4GHz, can noticeably reduce interference in built-up areas.
Restart and update firmware High impact
The oldest trick still works
A router that’s been running for weeks or months without a restart can develop memory issues that gradually slow performance — the wifi equivalent of a browser with too many tabs open. A simple restart clears this.
While you’re there, check for a firmware update in the router’s settings. Manufacturers regularly release updates that improve stability and performance, and an outdated router is often quietly underperforming its own capabilities.
Use the right frequency band Medium impact
2.4GHz vs 5GHz
Most routers broadcast two networks: 2.4GHz, which travels further and passes through walls more easily but is slower, and 5GHz, which is faster but has a shorter range and struggles with obstacles.
If your router lets you name them separately, connect devices close to the router to the 5GHz network for maximum speed, and devices further away to 2.4GHz for better range. Many newer routers merge them automatically and pick the best one — check your router’s app or settings to see which mode you’re in.
Manage connected devices Medium impact
Too many devices, not enough bandwidth
Every phone, laptop, smart speaker, TV and doorbell camera on your network is sharing the same bandwidth. If several devices are streaming, backing up, or downloading at once, everyone slows down.
Most router apps show connected devices and let you deprioritise or pause ones you’re not using. If your router supports Quality of Service (QoS), enabling it lets you prioritise video calls or work devices over background downloads.
Router upgrade or mesh system? Often the real fix
If you’ve tried the fixes above and coverage is still patchy, the router itself may be the limit — and the right upgrade depends on your home:
- A new router is usually the right call for a flat or smaller home with one persistent weak spot. Modern routers cover significantly more ground than older models, especially anything more than 3–4 years old.
- A mesh system is worth it for larger homes, multiple floors, thick period walls, or genuine dead zones — areas a single router, however good, simply can’t reach. Mesh uses multiple nodes placed around the house to blanket every room in one seamless network.
Rule of thumb: if moving the router and adding a single extender still leaves dead zones, that’s the signal you need mesh, not another single-point fix.
Browse routers and mesh wifi systems
Upgrade your router or go mesh for full-home coverage — all shipped across the UK.
Common questions
The most common causes are poor router placement, interference from other devices or neighbouring networks, an outdated router or firmware, too many devices competing for bandwidth, or simply being too far from the router with walls and floors in the way. It’s rarely your internet connection itself.
Yes, significantly. Wifi signal weakens with distance and is blocked by walls, floors and large appliances. A router in a cupboard, behind the TV, or in a corner of the house will always underperform one placed centrally and openly. Moving a router is often the single biggest free fix available.
A new router is usually the right fix if you have a smaller home or flat with one persistent problem area. A mesh system is worth it if you have a larger home, multiple floors, thick walls, or dead zones that a single router genuinely cannot reach no matter where you place it.
2.4GHz travels further and passes through walls more easily but is slower and more prone to interference. 5GHz is significantly faster but has a shorter range and struggles with obstacles. Most modern routers broadcast both, and devices should automatically pick the better one depending on where you are in the house.
A router that has been running for weeks or months without a restart can develop memory issues that gradually slow performance. Restarting it every few weeks, and checking for firmware updates at the same time, clears this and often resolves creeping slowdowns with no other cause.