OK lads, having a right mare here. Re-doing a bathroom, shower etc. Have boarded the shower with multipro and extended this board across to the end of the room. Existing crap was plywood which had rotted etc, didn't make sense to multipro the shower area then finish the wall with something different; just to keep everything kosher the entire wall, enclosure etc is the same material. 8X4 by 12mm multipro cementitious board. It's white, smooth on one side and slightly textured on the other. As per the 'destructions' I am tiling on the textured side.
Doing various tests etc and with a new ba