BeatCH5 years ago000How big can the unevenness be so that it still works?Show in original language (German)hans.t.schmid5 years ago000Unfortunately, I can't say anything for sure because we don't have any big unevenness in our floors. But I have the impression with this hard floor cleaner that even 3mm is no problem. Greetings HansShow in original language (German)Commentrbtrumpp5 years ago000So in our case the tiles have approx. 1 mm to 1.5 mm and here the whole thing still works. Greetings RayShow in original language (German)Comment