I am in the process of having the gable wall k-rendered. The workmen where supposed to continue with the work today, they where meant to start it a month ago, have it all completed but they have done 2 days and half a day 3 hrs so far. Today they turned up but cleared off, I was showing a friend the wall and noticed so many cracks in the k-rend and when tapped it sounds hollow! Rang the workman, told him, asked why he cleared off today and he said he would turn up on Monday morning to look at all the cracks in the k-rend. I've had enough of all the messing around. What needs to be done to resolve the k-rend cracking? Knock it off and start again? Any advice would be gratefully appreciated. Thank you