Yes, you better have the walls and carpets tested, my brother bought a house in Oregon back in the 80’s. It was unknown that it was a Meth house. He tore out the carpets (the urine smell was really bad, the owner claimed it was several big dogs) took out the cabinets, stripped the walls, then found out it was contaminated…needless to say, he never lived in that house, it was eventually burned down, I think. A total loss…he still has check-ups and is afraid he will get some wierd cancer eventually.