chipboard floor

Hi, I was told that the bathroom chipboard floor has to be laid with plywood of at least 9 mm thick, before tiles are laid. In my mother's house some ago the bathroom chipwood floor was overlaid with 5mm plywood. Is it mandatory standard to use 9mm ply on bathroom chipwood floor? Thanks

Hi, I was going to use some Mapei Super Flexible Adhesive I have kicking about (which I've just found out is specially fomulated for B&Q - which is ringing alarm bells as I'm sure it will likely be inferior). I rang Mapei and they said dont use that! Instread, sand the floor to create a key...

Hi all I'm hoping you can give me a steer on this one. I have a 10-year old townhouse with the kitchen on the 1st floor. The builders (numptys that they were) laid the kitchen floor tiles staright onto chipboard. Yep, you guessed it, numerous lose and broken tiles 10yrs later. Am in the...

Hi All Im a newbie to DIY tiling and need some advice please. :) We've recently re-fitted our bathroom and Im not onto the tiling stage. Ive done most of the walls and am now onto the floor. The issue I have is that the floor is 20mm tongue & groove chipboard, which in my ignorance looked...