I have a 50 yr old row house. Never had a water problem... except for during Isabella, the sump pump didn't work and water backed up into the finished basement. I dried everything out and didn't think much of it.
Fast forward 5 years, and I have the house up for sale. Buyer made an offer contingent on mold test. (My agent didn't know why as she hadn't noticed anything, other than it smelled a bit musty from the house (vacant) being closed up. I have asthma to cats, dogs etc and never had a problem). Test came back "high" for several types of mold, including the stachy stuff. They also saw, but didn't test for, mold on attic rafters. Buyer bailed.
I had one company (name dropped by the home inspector who did the testing) come in. He told me the only way to eradicate it was to completely rip out all of the knotty pine and go down to the cement. $8K (reduced from $11) for that and sanding and encapsulating the attic beams. I had a second company come out. His version is that the basement doesn't need to be demo'd, that the mold is on the surface of the paneling (and that it normally feeds on wallboard etc, not wood) and can be treated by sanding and using clear encapsulant, the same as both of them propose for the attic, and it will pass the next round of tests. For $3400, including retest. Claims the first guy is just in it for the money. I'm not sure the 2nd guy is necessarily accurate (although I want him to be!) or is saying that depending on how the tests are performed, they can be "made" to say anything. He also said he doesn't believe the first set of tests, that if they were accurate, everyone would be sick, and the walls would look like the photos he showed me of someone with far less count. He says the home inspector must have done the tests wrong, sticking it directly in one of the small pockets of mold rather than testing the air. Both companies agree that the stuff in the attic may well have been there since the house was built, as back in the day, people didn't care if there was mold on the wood which had been sitting outside. Both agree the probable source was the sump pump overflow (sump was replaced during that episode, and no further problems). Oh and 1st guy claims he can see mold spores on the paneling. Second guy says he can't.
I'm trying to sort out just what IS going on and what the right answer is. I don't want to have to tear out and rebuild the "clubroom" in a house I no longer occupy if I don't have to, but I don't want to endanger anyone (or any sale!) if it truly is necessary. I have a 3rd company coming out this week. She has just seen the test results, and also feels that many home inspectors don't know how to collect the tests correctly, and says generally knotty pine doesn't need to be removed.
Sorry. Long tale, I just get so upset every time I try to tell it! What I'm asking at this point (in addition to does anyone have any thoughts on these scenarios) is - are these companies known for having a high incidence of scammers?