We have just had black limestone paving laid. I wanted grey grout. My tiler said he would have to make this up. the job is finished and I am not happy. It looks a mess and the grouting is not an even colour. I have done a search on the internet and there is lots of ready-made mortar available to purchase so don't understand why he would mix it himself? I will post some photos in a minute. Please let me know if you think this is an acceptable job? is it possible to have the mortar removed and redone?