Grout cracking

[Nightowl]

HI
ring shank nails of the right depth every 4" and a flex adhesive If there is a lot of flex in the floor (bounce) use bal flex adhesive as it is very good at sorting out a problem floor for good
(but expensive)

 

[Perry]

HI
ring shank nails of the right depth every 4" and a flex adhesive If there is a lot of flex in the floor (bounce) use bal flex adhesive as it is very good at sorting out a problem floor for good
(but expensive)

and flexible tiles ? :santa_cheesy:

 

[sWe]

Diagnosing grout failiure

 

[LM Ceramics]

got to be the exisisting floor underneath i use to use 6mm ply before i discovered this forums and a couple of bathroom floors i did had call backs of grout cracking have used 12mm or 9mm screwed down properly never any problems

another common grout failure is bad mixing of the grout when we were apprentices we were shown correctly how to mix grout some of the apprentices at my old firm after a year couldnt mix properly lump and all sorts

 

[medlar]

i am assuming that seeing as it is the repaired area that is cracking,and that was the original reason for the repair (grout cracking away),that the floor is at fault,not the ply you used.
Seems logical that if the original floor,then the repaired floor both reacted in the same way,and in the same places it has to be an underlying fault (no pun intended) with the original floor

 

[Nightowl]

LMAO they could help too you could use sky hooks also lol :santa_cheesy:

 

[Nightowl]

ooops sorry i think i posted that in the wrong place lol
But i am new on here hehehe :santa_cheesy:

 

[Big B]

and flexible tiles ? :santa_cheesy:

Exectly. If the floor bounces, no amount of flexible adhesive will stop rigid tiles, and grout cracking.