Wet room tips and ideas

While exposed or boxed in pipework is often acceptable in a bathroom, it would really spoil the looks of a wet room.
Hiding the pipes in the walls needs good planning - they should run where you will not need to put a screw in later on and come out of the wall exactly where your towel warmer, tap or shower will receive them.
When fitting a concealed mixer valve positioning the pipes is not a problem, however fixing the mixer at the correct level in the wall can be challenging, especially with less-than-flat walls. Usually the design of the valve allows for about 10mm error either way which can be surprisingly insufficient in some cases.
When hiding the waste pipes for a basin it can be difficult to tell exactly where it lies once the tiles are in. Because no detector will show its position, make pictures, measurements, notes and make use of them before you start drilling.

When waterproofing do 2 to 3 coats of Mapegum WPS, BAL WP1, Ardex WPC or similar. It is important that there are no holes in the covering - a tiny defect may not seem like much, but it is enough to potentially compromise the whole installation. To get a consistent waterproofing layer you need a smooth wall to start with and then if you do the first coat with vertical movements of the roller, go horizontal for the next coat. On the floor, the corners and any other problematic, prone to cracking areas need to be reinforced with the fibre mesh recommended for the product you are using. Always read the information on the packaging.