Extending the wi-fi signal

[steve1]

I know this has been discussed before, but I can't find it using the search function, so here we go again.
I need to get a better wi-fi signal in different parts of the house, and possibly in the garage, can someone point me in the right direction as to how to do this, is it a plug in thingy that transmits it through the ring main, or did I dream that.

[steve1]

So basically you need the home wifi unit plugged into a socket and then a remote unit plugged in to extend the signal to wherever you need it, as long as it's on the same ring main.

[steve1]

Seeing as it's for my iPad I might take a look at the apple product, does anyone know how far it extends the signal, in the real world, and not what they say.

[steve1]

So simplify things for me, I have a bt home hub wired into the desk top, but also giving the wifi signal for me to use my iPad in most rooms in the house within reason, but when I go upstairs it really does struggle with signal strength, and if I were to take it down the garge it drops out altogether.
So what do I need to be able to boost the signal upstairs and to allow me to use the iPad in the garge as well, ( which has power into it via the house dist. Board ), and is approx 20 mtrs from the house.

[steve1]

So if I bought the edimax unit/s as in the link above they should sort out the problem.