Stone, soil and a long way from the box: what happens to a wifi signal on its way downstairs, and what to try first.

Off the shelf, out of the corner and into the middle of the house. The one move that helps most.

A walk around a house with a laptop, writing down the speed on each side of every wall.

Planning the route, feeding the cable through a small hatch and pulling it down to the hall.

Cutting, sorting the wires, crimping and testing one plug, slowly, with a mistake left in.

What the numbers mean, why the first test lies, and how to test the same way every time.

When one box cannot reach, a second one can: where it goes and how it connects.

Labels, short cables and a tidy cabinet, so you can find the one that matters in a year.

A long bit, a steady hand and a bag for the dust: how I get a cable from one room to the next.

How I measure every room and mark the result on a drawing, so the weak spots show up at once.