What's involved in fitting a power shower?

I've just moved into a new house and the power from the one that's already installed is very weak.

Will I have to have all the tiles ripped off the walls? Don't wanna do that really!

Additionally, any volunteers to fit it?

If you're DIY'ing it, then half the wall will probably have to come down.

Depending on what's in the wall (stud, brick, other obstructions etc...) will depend on whether it has to come down or not, and whether any damage will be caused or not. You'd be best off getting several quotes in before doing anything, you'll also get an idea of exactly what will need to be done and whether your hot water system is up to it.

Could just replace with a more powerful model but if the powers weak it may because the water pressure is low (particulary if off a combi boiler) it may be possible to install a booster pump somewhere near to the shower (airing cupboard?) and have a thermostatic valve in the shower to control the water. Shouldn't cause too much damage to the existing shower - are you good at DIY?

i had this problem and it turned out that there wasent enough water pressure .

i got a plumber into do the whole bathroom and he did that while he was here...im gonna train as a plumber....so check back on this post in 2-3 years and i'll answer for you haha.

Its not a combi boiler, just a normal bog standard one. I'm not really a DIY expert I must admit (I do sell ale well though :D ). If it is water pressure, then how would one improve that?

If it's not a combi, then you should be able to simply fit a pump which is relatively straightforward. You should also be able to do this without ripping the walls open. Pop into B&Q and have a look at their leaflets.