crakers on grout [travetine tiles ]

crakers on grout [travetine tiles ] Images

crakers on grout [travetine tiles ]

crakers on grout [travetine tiles ] Description

hi, would kindly help anyone of you who is knowlegeble in the subject how lay travetine , is ok to lay it directly no playwood ? or one have to lay over the playwod cement and (http://maplered.com) chicken wire?
on my kitchen floor the Tiles (http://www.g682.net) of travetine were layed directly on playwood, this happpen 3 months, now there is crakers on grout. at that time i told me the workman that he could not lay the Tiles (http://www.g682.net) directly on plywood, he told me nowdays one can do it and (http://maplered.com)  there is not problems.
 
is he right over it ? and (http://maplered.com) why then there is ugly crakers on the grout of floor kitchen, please advice . thank you    rosina london    

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