Can I use aqua boards for all the walls in my eu suite

Yes I would entirely cover the room. Remember that the moist will be all over in the air once you having let say shower and that sits on walls

In short yes they can. Word of advice tho! If you have high ceilings above 2400mm from floor then I wouldn’t recommend it. Can still be done but would be a bit of an eye sore due to joining strips, as they come 2400mm by 1200mm Hope this helps

Aqua panel needs to be supported if on a stud wall as it is too flexible to tile on without something behind it. However ,I would suggest you use a more solid cement based board such as 12mm Hardi Backer Board which I would definitely advise you to use all over or at least in the critical areas of the bathroom

Boards are fine to have on all walls , you just need to have the right extractor fan .

Yes you have to I always explained to my clints how important and nessesary to make wetrooms, bathrooms properly sealed even fully Tanking so..much is you do less problem in future Thanks Tim Great View Builders.