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doug boardley
I wouldn't even dream of starting tiling unless ufh had been commisioned first, ditra or not.Agree with all the others , Ditra is a must with stone on UFH , especially if the UFH hasn't been commisioned prior to tiling ( which it ought to be really ) . However , UFH is rarely commissioned b4 I get there usually , so Ditra is a given to negate the majority of the risk.
Got to start a limestone floor on Monday - 150m² - seeing Ditra in my sleep :0) . 4 tile pattern , biggest is about 900 x 600 . Thinking of hiring a crane to lift the big ones into place , me old back not up to it these days. :0)
Cheers
Diggy