How to fix weak Wi‑Fi in a two-storey house

Why one router cannot cover a modern home, why plug-in extenders disappoint, and what actually fixes dead zones for good.

If the Wi-Fi is great in the basement and terrible in the upstairs bedrooms, you are not alone. Most homes get one router from the internet provider, installed wherever the cable comes in, and it is expected to cover every floor.

Why one router is not enough

Wi-Fi signal weakens through every floor, wall, duct and appliance between you and the router. Floors are the worst: joists, subfloor, ductwork and drywall all absorb signal. A router in the basement corner may reach the main floor fine and barely reach the far bedrooms.

Why extenders disappoint

A plug-in extender repeats the router's signal, but it has to listen and talk on the same radio. That roughly halves your speed for everything connected through it, and it only helps if it sits where the signal is still strong.

Wireless mesh kits are better, but each unit that connects wirelessly to the next one loses speed with every hop.

What fixes it: wired access points

The reliable fix is to put access points where you need coverage and connect each one with an Ethernet cable back to a switch. Every access point then delivers full speed, and your devices move between them as you walk around.

A typical two-storey house with a finished basement needs:

• One ceiling access point per floor
• One more for a large backyard or detached garage, if needed
• A switch and router in a central spot, often the basement

Ceiling mounting matters. Access points are designed to broadcast downward and outward, so a ceiling in the middle of the floor covers far better than a router on a shelf.

Getting cables to each floor

In finished homes, cables are usually fished up through closets, attics or alongside existing plumbing and duct runs, so very little drywall needs patching.

Check the setup, not just the hardware

Good hardware still needs good setup: channels chosen to avoid your neighbours, power levels that let devices hand off between access points, and separate networks for smart home devices and guests. A coverage check after installation confirms every room gets a strong signal.

Quick checks before you call anyone

• Restart the router and update its firmware
• Move it out of cabinets and off the floor
• Test speed next to the router: if it is slow there, call your internet provider first