Wet room installation

[Timothy Hill]

Hi,

I am thinking of installing a wet room in a stair well cavity that incorporates a toilet, shower and sink. Obviously it will have a suspended timber floor construction, and I think will use 18mm Marine Grade Plywood for the floor covering. However, I am unsure about most of the other aspects of the project... The main areas that I feel I need assistance on are:

What gradient drop do I need in order for the water to drain away sufficiently. > What would be the best way to seal the room - would water proof tile adhesive

and grout be enough? I have heard talk of 'glass reinforced polymer tanking' would this be a better solution?

Any other issues that I should consider?

Cheers

Tim

[Greg W]

and grout be enough? I have heard talk of 'glass reinforced polymer tanking' would this be a better solution?

Polythene sheet on the floor and up to 100mm up on the walls will give you added peace of mind. I completed my wet room 3 months ago using swimming pool adhesive and grout. So far so good...

Greg

[Timothy Hill]

adhesive and grout be enough? I have heard talk of 'glass reinforced polymer tanking' would this be a better solution?

Did you lay the tiles directly on to of the sheeting, or did you screed on top first?

[Big Phil]

adhesive and grout be enough? I have heard talk of 'glass reinforced polymer tanking' would this be a better solution?

I'm thinking of doing a similar thing, but on top of the ply I'm going to lay "Wedi Fundo" board which is a waterproof base which already has the drainage slopes and drain, all you do is tile straight on top. See

for the details. It's not cheap though, probably set you back a few hundred pounds, but that shuld include waterproof boards for the walls too.

Let us know how you get on. Phil

[Timothy Hill]

Hmmm, seems a trifle expensive! Anyways, that aside, does anybody have a reccommendation as to what the drop should be? I have read on here that 1/4" per foot should be sufficient - any comments?