My porcelain kitchen tiles are lifting - help.....

[DHTiling]

Hi Dave,I am not disputing bs5385,i am just trying to help the guy,the nogins are to support the floor and take any bounce
or spring out,they go under the joists to the subfloor,i know its not an exact science,but in a case like this
it will help give extra suppot in the affected areas.

Phil noggings go between joists,you are talking about supports but the point members disagree with is your recommend of 9mm ply


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[redrex]

Well hello everyone! It's been a while since i've posted but I have been dipping in and out now and again. Nearly a year and a half since I had too take a break but looking at picking up the tools again. This thread caught my eye, as it seems to be a very similar situation to one of the previous jobs I had. A couple of pics for you but essentially a similar issue. Lack of support to the sub floor with underfloor heating, incorrect addy/inadequate depth, no expansion joint to change of substrate. In this case, I stripped the floor (that sounds so simple, doesn't it?:lol🙂 added some supports, substituted 18mm for 15mm ply to allow extra bed depth, 2 part addy,flexy grout, expansion joint, refit woodwork, paint, Silicon and job done. As usual, the tricky bits were getting the old ply up and making sure I kept as many tiles intact as possible, having no spares. As a happy aside to the work, the 1/3 tile across the room then allowed a much nicer set out to that end of the room.

Advertisment over! Seriously though to the OP, It is probably possible to fix the problem but IMO it will require that section of floor to come up. If you are anywhere near me, happy to have a look for you. A quick fix is possible but unless you start over, the problem will happen again.

Pics for you...