1. Initial Planning / Suitability of your Floor
Both timber and concrete are suitable substrates for wetrooms.
A wetroom does not need to cover the entire bathroom or bedroom area. It can be restricted to a corner of a bathroom or indeed a corner of a bedroom for an en-suite. A key benefit of our system is the need to waterproof only the "wet" area reducing costs to a third of normal levels.
Whilst a concrete floor needs only sharp projections removing, timber requires floorboards or chipboard lifting and discarding around the wet area. Lay a perimeter strip of plywood around the underlay (as shown in the drawing), all screwed at 230mm (9") centres or reinforce the floor by overlaying with 18mm plywood screwed as before.
Thinking of wall tiling? Stick a length of carpet tape on the wall and strip it off. If there is paint or plaster stuck to it the tiling will not be safe or secure so apply tile backer board.