Help and advice on tiling bathroom floor

[vvvvw]

Hi
I am ready to tile my bathroom floor its about 5m2 max and at the moment its stripped to the joists fo plumbing.What would be the correct way to go.I cannot feel any deflection if there is its minimum.There seem to be so many different oipinions of what one should d😵ne independent tile retailer said always lay ditra matt wether installing UFH or not.Thought that only help lateral defection and not vertical.Some people say 18 - 20 mm ply others say moisture resistant chipboard flooring others say 18mm ply with 6mm backer board.
Please can anybody out there clarify.All i am after is a tiled floor possibly with UFH but a floor that has a reasonible chance of not failing in 6 months time.



Many thanks :yes:



Martyn

 

[Rookery]

If I'm reading this right, you're back to the joists having removed the original floor covering? If thats the case, then 18mm ply on its own with or without extra noggins does not meet BS guidelines and would not be guaranteed by most adhesive manufacturers. 18mm ply should be used as an overlay ie on top of the existing floorboards. In practice I prefer not to add timber to timber so I overboard a sound floor with 6mm Hardie glued and screwed. I believe that even this method is below what BAL for example would recommend, they would say 10mm. In your situation I would suggest either new t & g chipboard plus Hardie overlay or perhaps 25mm WBP ply. As you can see from the replies, different people do it different ways.

 

[Alan.P]

If I'm reading this right, you're back to the joists having removed the original floor covering? If thats the case, then 18mm ply on its own with or without extra noggins does not meet BS guidelines and would not be guaranteed by most adhesive manufacturers. 18mm ply should be used as an overlay ie on top of the existing floorboards. In practice I prefer not to add timber to timber so I overboard a sound floor with 6mm Hardie glued and screwed. I believe that even this method is below what BAL for example would recommend, they would say 10mm. In your situation I would suggest either new t & g chipboard plus Hardie overlay or perhaps 25mm WBP ply. As you can see from the replies, different people do it different ways.

I just had a quick skim through my copy of BS, couldn't see it, can you give me the numbers.