---
title: Five things to try before buying a Wi-Fi extender
description: Extenders are the last resort, not the first. These checks fix most dead zones for free, and tell you what to buy if they do not.
date: 2026-07-08
updated: 2026-07-08
category: howto
tags: [Wi-Fi, troubleshooting, residential, extenders]
url: "https://relaypoint.ca/blog/wifi-dead-zone-troubleshooting"
author: RelayPoint Technologies
---

A Wi-Fi extender halves your speed and adds a second network name to argue with. Before you buy one, spend twenty minutes on these. Most dead zones are a placement problem, and placement is free.

## 1. Move the router

Routers end up where the cable comes in: a basement corner, a closet, behind the TV. Wi-Fi radiates outward and down more than up. Move it to the most central, highest spot you can reach with the existing cable, out in the open, not in a cabinet. This alone fixes a third of the calls we get.

## 2. Check what is in the way

Stand where the signal is bad and draw a line to the router. Count what it passes through. Brick, stone, concrete, tile floors, mirrors, a fridge, an aquarium, foil-backed insulation, a metal duct. Two or more of those and no amount of power will help; the fix is an access point on the far side of the obstacle.

## 3. Look at the channel

Your neighbours' networks compete for the same airtime. Most routers pick a channel at boot and never change it. In the router's admin page, set 2.4 GHz to channel 1, 6 or 11 (whichever a free phone analyser app shows is quietest) and let 5 GHz auto-select. If the router is more than five years old, it may be congesting itself.

## 4. Separate the bands, or stop separating them

Some routers broadcast one name for both 2.4 and 5 GHz and steer devices between them, and do it badly. Some broadcast two names and devices cling to the wrong one. Try the opposite of whatever you have. 5 GHz is faster up close; 2.4 GHz reaches further through walls.

## 5. Count the devices

Forty connected devices on a consumer router is a load problem, not a coverage problem. Smart plugs, bulbs, speakers, cameras, doorbells, two laptops, four phones, three TVs: it adds up. The symptom is "Wi-Fi is slow everywhere" rather than "slow in one room".

## If none of that works

Then you have a real coverage gap, and the answer is a second access point with a cable to it, not an extender. If you genuinely cannot run a cable, a mesh system with a dedicated wireless backhaul band is the next best thing; an extender is the last resort.

:::tip When to call someone
If the house has more than one floor, brick or plaster walls, or you have already bought two gadgets that did not help, a survey with a heat map will show exactly where the gap is and what closes it. It usually costs less than the gadgets did.
:::