Hello! I am a single mom, maintaining a house (yes, with a LOT of duct tape), and many questions. I am wanting to have vinyl flooring laid over an existing floor. I was told by a salesman that because my existing floor tile has black adhesive beneath it, I have a potential asbestos problem. Yikes. I have 12 X 12 tiles which are the thickness of vinyl self-stick tiles but do not have shine to them at all. I am estimating they were laid about 38 yrs ago when the house was built. One tile came up and I can see black beneath it, and the floor is laid directly over concrete. I am very worried about this and wonder if anyone can shed light on how to evaluate whether there is asbestos in any of this flooring/adhesive. Any ideas?