Connor King
Hi cherry, It would be advisable to contact a good plumber/ kitchen fitter to asses the situation. Firstly the leak needs to be rectified and then when the kitchen is ripped out asses the water damage. If it’s a wooden floor underneath ( joists ) then depending how long this has been happening, you may have to re- joist the room. If it is concrete underneath then I would let it dry completely before attempting to tile over. I specialise in bespoke kitchen fitting covering all potential areas that need addressing. I am based in Portsmouth and cover a 50 mike radius if this helps. Hope this helps Connor C.K plumbing services