1-Stop
Member
I’ve lurked for a while and gotten some great info and insight a number of times but it’s first post time with this mess. I went to measure a dining room in a restaurant for t&g cleaning and came across this. At first glance it just looked like normal black grout but looking closer I’m lost as to what it even is. It seems like grease build up but it’s on a massive scale, throughout every inch of the room, and that doesn’t make sense to me. It’s so soft I was able to scrape some away with a pen cap and then using my pocket knife I easily got all the way down to what felt like grout. First instinct is to run away but I thought I’d throw it out here before making my final decision. The area in the pics is the complete opposite end of the dining area than the kitchen too. I’m stumped, any advice?