Can Christmas Lights Really Play Havoc With Your Wi-Fi?

Because your wireless network is much less powerful than a big FM transmitter and its waves are weaker, where you place the router and what you have in your house will have an impact. Home electrics, microwaves, steel girders, concrete cladding and foil insulation all can have an effect. Older properties with their thicker walls make a difference, too, as the lower-powered, high frequency Wi-Fi radio waves struggle to penetrate them. – Andrew Smith, Gizmodo