While a single stain may not be enough evidence to establish a case for a former methamphetamine lab, I commend Phillip for his concern for his clients. I don't think his credibility would come into question if he expressed his concern and it turns out clean. I've read, then quickly forgotten all the reports of homes being used as former meth labs as I was quite sure it would never be an issue that would surface around areas that I serve. As of just a few days ago, I've been proved wrong. About four miles from my home, renters of a house in a very nice rural area, on a nice country road where I've inspected a few fine farmhouses, were just busted for manufacturing meth. This is an area where the crime rate is one-tenth of a percent of the national average and the median income is much greater than mine. Law enforcement officials estimate that for every lab busted, there are at least ten that are unknown. These eventually end up on the market and get purchased by unsuspecting, innocent families. No one is disclosing former labs to new owners. There's only a handful of databases in a few states, listing only busted labs. The home buying public has no warning of the long-term health concerns or what to look for. I think it would be a good idea for all home inspectors everywhere to get credible training in the recognition of former meth labs. There's training, originally aimed at first responders, now available to those in property management and real estate related professions. Sorry about the rant, but this is a timely topic for me. I will be completing my training by the end of the month. "Every day a child gets sick because they are living in a meth lab home and their parents don't know it. No one ever thought it was important enough to tell them. Warning others about a meth lab home before they buy or rent it is the right thing to do". methlabhomes.com