Simply use a wet mop and mild dishwasher solution. Slate tile supplied by ASC is even thickness with a machined, flat back and can be thinset saving labor costs. Slate quality depends on the quarrying and processing to obtain good sound material without broken corners which does not laminate and where all slates are of even thickness. Purchasing second grade material for a lower price is a shortsighted policy as in many cases it greatly increases installation costs in excess of the lower price of the material. ASC supplies materials from only one quarry source for each product.
Materials are color selected and sorted for each different trademarked product.
Agent importers purchase non selected materials from many sources and mix them.