[Sephiroth]

The SH is rubbish on wireless and more than likely the house itself isn't helping. I've got a top class router in one part of my house but in my office, wireless is poor.

So I use a Powerline adaptor to punt ethernet over the mains from my router to the office Powerline. I connected the Powerline to a hub/switch and connected a port on the hub to a wireless extender in my office. This extender uses the same SSID as my router so I can move around the house wirelessly.

This solution is ideal in the type of house described - but involves laying out dosh.

Don't even think in terms of the wretched SH wireless decently reaching any part of the house where difficulty is currently experienced.