'Contaminated' chipboard

[Martyn Leeds]

In this case its to avoid adding additional 6mm height (as per previous threads)

But as we're not that fussed on the advice re preparation, I don't get the additional fuss re a bit of spillage. My guess would be that the Chipboard would be absorbing whatever was spilt, in the same way the water from the adhesive that you'll be using as well.

The answer that you're looking for is: No. It won't effect it. Crack-on....

 

[The Legend; Phil Hobson RIP]

Just my take on this Chipboard is not and never will be a suitable substrate to lay tiles onto, decoupling membrane will do nothing to change this, I would overboard with Hardie backer glued and screwed as above.

Who suggested Ditra, Dural?

 

[dave l and l]

the op mentioned de coupling
if you are worried about chipboard and wont listen to advice on hardie, lift all the chip board and replace with ply, min 18 mm, maybe add in some extra dwangs then fill your boots with the dural

 

[afright]

If you do not want the additional expense now,you will more than likely have it in the future.

 

[Bubblecraft]

As mentioned above, oil on the chipboard would be the least of your worries. Correct method would be to overlay with a 6mm hardie, glued & screwed. If height is an issue, take out your chipboard & replace with a min of 18mm WBP ply with additional dwangs/noggins.

If you REALLY don't want to go down this route, use a 2 part flexible adhesive (cement based adhesive with a latex compound) to give you the highest flexibility possible. It will adhere to your chipboard and your oil stained area but I cannot guarantee it will not fail. You will have a better adhesion to P5 chipboard flooring (green in colour) as opposed to P4 flooring (brown in colour) as expansion & contraction will be less than standard chipboard but it STILL has movement. Again, your tiles will stick to the chipboard floor but 9 times out of 10, your grout lines & tiles will crack. More so as it is in a high humidity area from cooking, washing machines, tumble dryers & sinks.

This may be a cheaper method right now but I can assure you, replacing this floor after using 2 part adhesive is not a job for the faint hearted & will be a costly fix.

P.S. Dural will not solve your problem. Good luck with whatever you decide to do

 

[Stuartpaul]

I've bitten the bullet and will be overboarding with no more ply and then use fleible adhesive and grout.

Anyone want 18 metres of dural?!