Good idea but...laundry in a pet space doesn't work, when clothes fall on the floor as they will, from either w/d the clothes pick up all the dirt and hair on the floor. Slate floor would be waterproof but you still have grout...in the pet room I designed the floor is stained concrete, the walls are tiled from the floor up (this wainscoting will get very dirty fast - especially when the dogs shake off all the water they will get in their bath.