All the way to the ceiling ideally. This would offer the best protection against water in all forms including steam, as this can get between tiles and stonework. As soon as steam hits any cool surface it will condense, and this could be on the back end of tiles of stonework.

Ideally yes. While not critical, we would suggest that waterproofing should be fitted to the entire bathroom area, as steam will most likely cover every wall. The rest of the bathroom area will not be subject to the same volume of water as the shower area, but over time, water seepage may become an issue.

Firstly, how much of the wetroom area do you want to waterproof? Just the shower area or the entire bathroom? To work out how much waterproofing you will need, work out the square meterage of the floor area and each wall that you wish to waterproof, and add them together allowing 10% extra for wastage. [...]

Aquaseal is basically a waterproof paint which when set, completely seals the area its on. It can be applied in the same way that paint is applied to a wall. The only stipulation is that it is put on relatively thick, and the installer needs to consider paint brush marks, as if too deep, it [...]

There is no better or worse solution out of the above 2. They both do exactly the same thing but are applied in different ways. The Aquaguard is effectively waterproof wallpaper, whereas the Aquaseal is a roll on waterproof paint. It all comes down to the installers preference as both work equally as well if [...]

The internal corner piece is used at the base of a recessed wall such as a joining wall in a 2 or 3 wall shower area. The external corner piece is used at the base of a protruding wall such as a dividing wall.

There is more jointing tape in the Aquaguard kit as this is a laid down sheet waterproofing and as such, may require more cuts and joints that will need sealing. With Aquaseal, it is a paint that will cover all areas without the need for cuts and so on.