Slow Wi-Fi in a Paris flat rarely comes from your subscription: most often it's a badly placed router, the thick walls of Haussmann buildings, a radio channel jammed by your neighbours, or ageing equipment. Before switching provider, move the router, change the channel and, if needed, add an extender or a mesh system. Here's the complete guide to getting a decent speed back, room by room.
First, tell slow speed apart from slow Wi-Fi
These are two different problems. Run a speed test with a wired connection straight into the router: if you get the speed your plan promises, the fibre is fine and the trouble is your Wi-Fi network, not the provider. Run the test again over Wi-Fi in the problem room: the gap between the two readings tells you everything. Nine times out of ten in Paris, the fibre is good and it's the wireless coverage inside the flat that's the issue.
The Haussmann wall, Wi-Fi's number one enemy
Paris's older buildings have thick load-bearing walls, sometimes in cut stone, with plaster on lath and partitions that contain metal. Every wall swallows part of the signal. A router sitting in the hallway behind two load-bearing walls will never cover the back bedroom properly. The signal struggles to get through, especially the 5 GHz band, faster but more fragile. In a long, through-flat, typical of Paris housing, a single access point almost never does the job.
Placing the router well changes everything
The router shouldn't be hidden. Here are the rules that work:
- Put it as central as possible to the area you want to cover, not in a corner.
- Raise it up: on a shelf, not on the floor behind the TV.
- Keep it away from large metal surfaces, the microwave and the fish tank.
- Don't shut it inside a closed cabinet or behind books.
Many Paris setups put the router where the fibre comes in, often the hallway, which is the worst spot. A simple move, where the socket allows, clears up a good share of the complaints.
The radio channel jammed by your neighbours
In a Paris building, your router shares the airwaves with twenty or thirty neighbouring networks. On the 2.4 GHz band, everyone treads on everyone else and the speed collapses at peak times in the evening. Changing the router's Wi-Fi channel, or turning on automatic channel selection, avoids the most crowded frequencies. The 5 GHz band is less congested and faster, but reaches less far. A good setting lets devices pick the best band based on their distance. A quick scan of the airwaves shows exactly which channels the neighbours are sitting on, so you can steer your router onto the quietest one instead of guessing. In a dense building it's normal to see thirty networks fighting over a handful of channels, and shifting yours by two or three slots can be the difference between a stable call and a stuttering one.
Extender, powerline or mesh: which to choose
When moving and tuning the router isn't enough, you need to extend the network. Three options:
- The Wi-Fi extender: cheap (30 to 80 €), but often halves the speed and creates a second network to manage.
- Powerline adapters, which run the network through your electrical sockets: handy in flats where pulling a cable is impossible, effective if the wiring is sound.
- A mesh Wi-Fi system, several nodes forming a single seamless network: the best solution for a large through-flat, from 120 to 300 € depending on the number of nodes.
For a three or four-room Haussmann flat, mesh is almost always the right call. You keep a single network name, the phone hands off from node to node without dropping, and the back of the flat gets a real speed again.
The ageing gear that drags everything down
A router more than six or seven years old, or an old extender, can throttle the whole network even with fibre. Likewise, a single old device connected over slow Wi-Fi can slow the others on the same band. Check the age of your router with your provider: replacement is often free and brings much more modern Wi-Fi. For serious remote work or stable video calls, support from IT support in Paris lets you map the coverage room by room and pick the right kit first time.
The method, in order
Test the speed on a wire, move the router central and high up, change the channel, then add mesh if the back of the flat stays in the red. In that order, you solve the great majority of cases without switching provider. If you run a small business with several workstations, the logic is broader: see small business IT support in Paris.
Want Wi-Fi that finally covers the whole flat, without spending the weekend on it? Describe your place and your dead zones to me at 07 66 84 52 57, by call or WhatsApp. I come out across Paris, measure the real coverage and install the right solution, router well placed and mesh if needed.