Say what?

Not at all certain what has just happened, but I think there will be no tearing out of walls. Whew. Two strange women rang the buzzer (can you ring a buzzer? or do you only buzz?) at 0815, seemed just as startled to see me as I was to see them, but one had a camera and clipboard, the other an official-looking leather folder, so I let them in. Pani Camera began taking photos of my wall, at various distances, from assorted positions, while Pani Folder was looking around and shouting directions. Shortly thereafter, my landlord showed up with the blue plumbers, who immediately began peeling away the cheap vinyl baseboard. There was probing with fingers, and oddly, sniffing of fingers. For mold? Mildew? Then much discussion, disagreement, with Blue Number One and Two apparently all in favor of doing some wall-busting, and my landlord and Pani Folder I think in opposition. I guess my landlord won, as Blue One and Two left after a few minutes. Pani Camera and Folder followed soon. My landlord brought out a new lease for me to sign, which I did, and I asked as best I could if the Blue Men were returning. I think he said no. He then proceeded to go through my place asking me if everything was ok. That is, piece by piece. Taps ok? Gas ok? Oven hood ok? Fridge ok? Toilet ok? Bed/sofa ok? And so on.
Eventually, after a few photos of his own, he too left, after saying something about the keys. I committed a faux pas as we parted, and I'd just learned about this: it's either very bad manners or very unlucky to shake hands through a doorway, but I had forgotten. It took a couple tries before I realized I had to step into the hallway with him to shake. But he too is gone now, and no one has returned, so I think I may be in the clear. Helluva way to begin the day though.