Just move to the 5.8ghz band. There's an extra 50MHz of bandwidth available and these frequencies are much more strongly attenuated by walls. There's also usual

Just move to the 5.8ghz band. There's an extra 50MHz of bandwidth available and these frequencies are much more strongly attenuated by walls. There's also usually much less interference from other unlicensed equipment like cordless phones, baby monitors and microwave ovens, although you can occasionally get hosed by a dodgy Chinese video sender operating at well above the legal limit. You might need to replace a couple of older pieces of equipment, but it's a hell of a lot cheaper than turning your house into a Faraday cage.