I have a downstairs loo which is a concrete floor which I need to raise about 50-60ml or so. I was wondering what the best way of doing this was and whether I should also take the opportunity to insulate the floor too.
Good point burnerman - I didn't have enough depth @ the door for more than 25mm of celo In the OP's situation chipboard will make a better floor under the lami.
Thank you for suggestions, how would I affix the chipboard to the celotex? ...I would be tiling on top so need the sub floor to have as little movement as possible.
What I don't know is what is under the concrete slab, it could have insulation beneath the concrete already in which case I could just put down some self levelling compound and then tile couldnt I?
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