I have a small house. A very small house. It basically has four rooms and it is made of wood. To the best of my knowledge it was not designed as a Faraday Cage.
And yet – it seems impossible to get wifi in every corner of the house.
I teach networking so I have a reasonable idea of how to set up such things. I’ve tried putting the WiFi access point everywhere. I added a big antenna. I added a high-power wireless repeater. I added a second network with its own access point, using a different wireless spectrum, and placed it at the other end of the house with a big antenna, wired via the mains. I added a third repeater. I added reflectors to direct the signal better. I got rid of anything I could that might be broadcasting on the same frequency.
There are 30 visible wireless networks around me and every time someone opens a garage door, answers a phone or switches on a microwave oven it makes things worse. Basically, there’s too much noise in the ether and everyone is shouting louder to get heard. I think I might go back to wires.