Bathroom Floor replacement

Good non slip sheet vinyl

Hi Greg, Regardless of the finish, you need to make sure that the sub floor is properly done, to achieve your desired "durable & extremely waterproof". Normally, for a bathroom, if you don't have a cement foundation, if you have wooden floor joists, you would like to have ideally a sub floor made out of marine ply (Marine plywood is specifically designed with structural strength for greater impact resistance as well as to absorb the effects of water movement and pressure), with sealed joints and edges, this way it will be solid and as water resistant as it can be. This will be suitable for Vinyl and tiling. For tiling, I always install a Schluter Ditra 25 matting, this will compensate for movement and will prevent cracks in tile & grout, as long as the subfloor is done properly. As for the finish, please go with whatever will suit you, based on the time & budget allocated but as I said, bear in mind that if the sub floor is not done right, the finished floor might fail based on that. I hope the above help!

This is how I proceed with my projects. Ideally when the jobs finished, the bathroom floor has be the same height as the floor joining the bathroom. It doesn’t have to be exact but it should not look like a step. So for example, let’s say you have removed the old floor from the bathroom. And you have measured that you only have 20mm in hieght before you come level with the joining floor. Now you can decide what your options are. But definitely have a sub floor in place what ever you decide. I hope this helps.

For a ‘belt & braces’ solution,I recently used a waterproof membrane on top of hardie backer board, followed by electric UFH and porcelain tiles.