Can I put ply down over tiles

Hi I'm having a new kitchen fitted. A wall knocked down opening the kitchen to utility room the floors all the way through at already tiled. One room is wood floor the other is concrete. The wooden floor joints have started to to crack and come lose (also tiler didn't board the floor before tiling ) he said because he was using flexie glue and grout .My question is could I board throughout with 18mm ply and then fit kitchen or will I need to lift all the tiles or can I leave the concrete floor tiled as they haven't budged and lift the wood floor tiles and put thicker ply down to keep it level

Asked by Stephen on 5th Aug 2025
Expert Trade Answers
"Hi Stephen.
I would recommend pulling all existing flooring up before you attempt to start levelling any floor’s. You want it all to to be on subfloor level and see what you require to do to gain a suitable level once it’s all existing flooring is up.
Thanks ben"
Answered on 5th Aug 2025 - Member since Sep 2024 - report
"Good morning.
You can put a ply on top of the tiles, but this will ruin both floors, since you will have to raise the wooden floor to the level.
The correct and professional solution is to remove the tiles, check the level, put the floor to the level and install the kitchen.
Do it professionally and it will last for years.
Have a nice day."
Answered on 5th Aug 2025 - Member since Jun 2025 - report
"Morning.. I would personally lift all the tiles on the wooden floor and apply 6mm ply to it.. i would then apply a self levelling screed to whole area to give you a uniform level finish.. 18mm ply over the are could cause creaking and movement as the sub floor it is on will not be perfectly level.. if you would like me to have a look and quote these works to give you a nice uniform flat floor pls get in touch..
Regards
Jerry"
Answered on 5th Aug 2025 - Member since Feb 2025 - report
Find Tradespeople, compare up to 3 quotes!
It's FREE and there are no obligations
Ask a Trade
Got a question that only a tradesperson can answer? We have thousands of trades ready to answer any question you may have.
Ask your question
Ask a Trade

Are you looking for advice on a DIY project or have a question for our tradespeople?

We'll email your question to tradespeople who are skilled in your chosen category.

Your question will be made public - please do not include any personal details.

{{ first(ask.errors)[0] }}

By continuing you agree to the Community Guidelines.

Report Content

{{ first(reportForm.errors) }}

Thank you

Your report has been created and will be investigated shortly.

Ready to get a price for your home improvement project?
Get started

Over 1 million homeowners and over 50,000 tradespeople
use MyJobQuote nationwide each year