Bathroom floor question - help quickly !

Bathroom floor question - help quickly !

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Mehul9216

Original Poster:

66 posts

169 months

Tuesday 24th January 2017
quotequote all
Hi All

Having our bathroom redone.

It is about 16m2 including dressing area.

The builders started yesterday and took up the floor, and also took the wall tiles off - they have got down to chipboard, which is the same stuff as in other rooms - so it looks like it was there originally from when the house was built in 2004. It isnt very thick stuff at all.

We know that the bathroom floor does have some flex in it, as the bathroom floor tiles had started to crack in lines. Could of course be other issues, but that is my hunch.

The builders are looking to put down 18mm WBP ply and then tiles on that.

I want to go belt and braces, and so this was my plan, but any feedback appreciated. Basically I want the floor to be as rigid as possible.

1 . Take up chipboard

2 . Add in extra noggins ?

3 . Use 25mm WBP ply and then 6mm hardibacker board OR should I do 18mm WBP ply and then 12mm hardibacker board - or something else

4 . Then tile with a flexible adhesive ?

I have read every internet forum and am so confused, so would appreciate some opinions.

Is hardibacker the best ? Should I use Wedi ? or Marmox ? Price isnt too much of a concern, as long as the job is done well.

Should the hardibacker be stuck down with adhesive to the WDP ?

R

Mehul