I'm planning a new bathroom in a property that I intend to rent out. The floor is standard wooden boards. I plan to put 15-18mm plywood on top and then lay self-adhesive vinyl tiles. The question is will these tiles create a real waterproof barrier? I guess the moisture will easily penetrate in between them? Do I need to waterproof the ply underneath to make sure it will last? If yes, what sort of product should I use for this? Any other tips or advice?
Thanks in advance!

Vinyl tiles will not be of any use if waterproofing is wanted. You need Altro vinyl with welded seams.

Hi..
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So it will only be a bathroom and not a wet room area..?

Yes, it's just a bathroom, not a wetroom. But since it wil be a rental property and water spillages are very likely I prefer to make sure that the floor is waterproof. I don't want tenants to ruin the floor under the vinyl tiles so I'm a bit worried.

By the way, I've got another question about the walls. They are concrete (unconventional, I know), they are now covered with two layers of tiles. When I remove these tiles, I guess the plaster will be ruined. I'll need to make them even and suitable for tiling and I planned to use hardibacker boards. But how do I attach them to the wall? Screws and nails won't go into concrete. Do I need to drill hundred of holes and use wall plugs or do I just glue them?

I would just get them re-skimmed.. and then tank any area's you think will be supsect to water damage..including the floor and then vinyl tiles over the tanking using a water resistant glue...

Originally Posted by Dave

I would just get them re-skimmed.

Dave, what sort of product should be used for this?

Originally Posted by Ann76

Dave, what sort of product should be used for this?

Plaster ( gypsum) skim-coat..

You may find that your'll have to use pva before skimming on old concrete or plaster