Huge problem and sleepsless night ,opinions please

[AliGage]

Was the UFH put in the screed or rolled out on top. Im confused

 

[Qwerty]

I assumed he meant SLC?

 

[gamma38]

Just read the original and i'm confused also, slc or screed. I did get told about a new electric heat cable that does go in the actual screed not on the surface. Bit more info needed i reckon.

 

[The Legend; Phil Hobson RIP]

Ok - so the Op knows - what causes thermal shock and how is it

identified?

Good question John thermal shock is caused by heating being turned up to high to soon. Could be also related to ufh not being commisioned correctly,.

Usually tile comes clean from bed, with just a bit of residue from adhesive on tile.

 

[White Room]

Ok - so the Op knows - what causes thermal shock and how is it identified?

Thermal shock caused by unusually large stresses when two dissimilar materials are bonded together or are in close contact, the adhesive needs time for the moisture to remain for it to cure, any sudden heat to soon will cause the sudden loss of moisture and weaken the adhesive to point which it could become crumbly and lose it's strength.

 

[One Day]

Sensible suggestions so far.
I've seen poor bonds on porcelain (while of on substrate) caused by tiles being stored outside in very cold temperatures.
Think the chilled tile doesn't form a good bond with the rapidset - not long enough for the reaction to warm the porcelain, whereas the substrate is warm and porous enough.
Just a suggestion....

 

[pdmbathrooms]

He layed the ply ,layed the heating mat then put slc over it as advised on the instructions , he is in the building trade so he wanted to do as much himself as he could , the thermal shock theory sounds the most plausible , the problem I now have is he reakons its my fault however I believe its all been prepped wrong .I made the mistake of presuming he knew what he was doing , I came in and saw a levelled floor and used products that are reliable , not sure how to approach it all

 

[Diamond Pool Finishers]

[video=youtube;v5wobrRYiiI]https://www.youtube.com/watch?v=v5wobrRYiiI[/video] And also remember that diffrent materials expand /contract at different rates !! witch causes problems in different layers applied to the substrate

 

[White Room]

Sensible suggestions so far.
I've seen poor bonds on porcelain (while of on substrate) caused by tiles being stored outside in very cold temperatures.
Think the chilled tile doesn't form a good bond with the rapidset - not long enough for the reaction to warm the porcelain, whereas the substrate is warm and porous enough.
Just a suggestion....

Again thats thermal shock due to the different temperatures, all tiles should be bought in for at least 24 hours to be climatized to the working areas.

 

[Diamond Pool Finishers]

And in response to TJ question you need to find -out the coefficient of every material in all the layers and make sure they are compatible like this or consult a set of pre-worked tables [video=youtube;5ud3kX9IVW0]https://www.youtube.com/watch?v=5ud3kX9IVW0[/video]