Warranty for tiling works

  • Erstellt am 2023-11-08 08:41:48

Finch039

2023-11-13 08:21:34
  • #1


Thank you very much for this detailed and above all question-related answer!

The dry screed elements were primed, then the decoupling mat was glued in flexible mortar. The inside and outside corners as well as the entire wall surfaces were sealed with a blue sealing tape. So everything is in order. The connection to the shower tray was also carried out properly.

I am only concerned about the deflection of the subfloor. It was sometimes already about 2–3 mm. I pointed this out to the tiler. His statement was: Everything is fine. The flexible adhesive adds so much stability to the subfloor that it doesn’t matter.

The tile format is now (unfortunately) 60 x 60 cm, laid with flexible adhesive in 5–8 mm (height differences) and grouted with flexible grout.
And I have my doubts whether this will hold permanently (and had already expressed these before). I hope we will see.
In case of damage, I only wanted to know whether I have claims if it does not hold.
 

KlaRa

2023-11-13 09:33:53
  • #2
The answer to this question is simple: If it was an official contract (so not "neighborly help," as it is called), then according to the Building Code you have a warranty period of 5 years. I would keep the final invoice as well as—if available—the craftsman’s offer, but also any possible dated remarks regarding concerns very carefully!! The flexible adhesive has nothing to do with the risk of breakage of ceramic tiles in larger formats! The deflection of the substrate is decisive here, as these stresses affect the material structure of the tiles. If the tensile stresses due to substrate deflection exceed the intrinsic strength of the tiles, the flexible adhesive will not save them. I do not want to "paint the devil on the wall" here at all! Even if workmanship in certain cases does not comply with the state of the art, this does not necessarily have to lead to damage. For this, the client has the warranty on material and service. ------------- Regards: KlaRa
 

Finch039

2023-11-13 09:53:52
  • #3


Official order with invoice. Thank you very much for the help :)
 

KlaRa

2023-11-13 09:57:20
  • #4
@ "Finch039": please secure the type designation of the decoupling mat and the other construction auxiliaries if possible ....
 

ypg

2023-11-13 11:02:45
  • #5


You had concerns before that 60x60 would work?
 

KlaRa

2023-11-13 11:14:15
  • #6
FERMACELL does offer the possibility to install larger format tiles/slabs on their gypsum fiberboards above wooden beam ceilings, but stipulates that the tiles must be at least 15mm thick and the edge length must be up to 80cm. A critical and overlooked aspect remains the unavoidable deflection of the substructure. Once again: up to 30cm x 30cm, the installation is uncritical, as the stresses that may occur from bending moments can be neutralized in the joints.
 

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