sub-floor preperation,

16 Dec 2012
Reaction score
United Kingdom
Hi, I am about to lay solid oak flooring onto what appears to be a concrete floor, I have pulled the carpet back and it seems to be laid over some old brittle tiles, (are they vinyl?) anyway they are stuck with what appears to be some smooth black paint/glue which also coats the whole floor (please see pictures)

Anyway the question is, are these tiles an old flooring finish, or are they part of the sub-floor fitted to provide a smooth surface/DPM to carpet over?

My plan was to rip up these old tiles, give a couple coats of liquid DPM, prime then glue my new floor

However thought rather than be too gun-ho maybe I should check the purpose of these tiles, should I leave them? thinking probably not?

Or any other tips on laying solid oak flooring onto concrete? whilst I will leave an expansion gap I have heard that a glued floor doesn't expand as much as a floating floor?

flooring has been in room for 2 months so should be acclimatised

Sponsored Links
Thanks for your reply

That's sounds messy and time consuming! could I use liquid floor leveler on top do think?

other option would be to glue straight onto tiles? its a pretty smooth solid surface, although seems a bit cowboy!
Prob you have is the sub floor might not have a Dpm under it.
you would be taking. Big risk laying over the tiles or straight to the old adheisve but it's your floor.

Can you not take the wood back and swop it for a engineered wood which you could floor with a Dpm underlay.
Sponsored Links
Hi thanks again,

This is the DPM I was recommended/planning to use, I've just checked and it says:

"SikaBond Rapid DPM is a one part component resin used for providing a Damp-Proof Membrane. Used for priming and sealing absorbent and non-absorbent sub floors, perhaps with weak cement screed or old adhesive residue"

Think I should be good with this stuff...
Not used it mate. Only use trade ones.
If that goes over adhesive then I'd like to find out more about it. Less then half the price of the one I use.

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local