Tiling Bathroom - Going overboard?

[ChrisSG]

Hi All,

New to the forum but not new to DIY...

Been reading a lot of posts on here recently to get some ideas on the best way to go about tiling the bathroom in my new house. It's not going to be anything too complex - L-shape bath with shower, sink on counter top unit, toilet and tiled floor to ceiling on all four walls. I'll be taking the old plasterboard walls out with the tiles on for speed as they'll no doubt get damaged taking the tiles off anyway.

My main question is, how far do I go with waterproofing behind the tiles?
I've read lots about using Wedi, Jackoboard etc but that would work out pretty expensive if I was to replace all plasterboard with new plasterboard then whack Wedi boards over the top to waterproof the whole room. Think that would also be unnecessary as it's not a wet room.
I was thinking of using Hardibacker board instead of new plasterboard on all the walls as this can be tiled straight on to and is water-resistant (right?!). Then around the top of the bath and the shower area, using some thin (6mm?) Wedi (or equivalent) board on top of Hardiebacker to make sure this area is waterproof.

I find it quite confusing as there's a lot of conflicting advice out there especially when you factor in the cost of some of this stuff!

Any advice or confirmations on the above would be really appreciated. Might even post some pics when it's done so you can judge the work accordingly

Thanks in advance,
Chris

P.S. Sorry if this is a repeat of other questions asked. Other threads I found led me to posting this though!

 

[Flintstone]

Address this now rather than down the line when it's all done and your fittings are in and your back to normal living and he's spent the money.

 

[Tony_C]

All your worries are there in black & white on the data sheet by the manufacturer but as long as he has done it before...