(Basement below grade) This did not happen in the other room because the tile I guess was better adhered to the concrete floor.. but in the other room it cracked and pulled up the tile below it you can tell because when you walk on it it has a little bit of a bounce and a clicking. Removing it is not an option, it would cost way too much not to mention the asbestos remediation. I thought of drilling some holes with the shaving cream trick and putting tapcons to "sandwhich" the layers tighter together.. but I'm not sure. I am looking for ideas. I thought of putting an OSB subfloor over top of an underlayment (DMX) but that would make a 1-in transition difference between rooms.. unless there is a tasteful way to make a transition, I don't know if that would work. Does anyone have any ideas here to save me? The plan was to put luxury vinyl planks down as a finish floor