I'm going to be putting a new floor down in my kitchen. Currently, there are 3 layers of sheet flooring (I can't remember if it's vinyl or linoleum). I've sent samples of all 3 layers off to the lab for asbestos testing and the results are what I expected. The top layer is fine but the bottom 2 layers contain asbestos. I'm looking at removing the top layer of flooring and installing tile over top. I know normally you're supposed to rough up the flooring and apply an adhesive before you screw the backer board down. I really don't want to rough up a floor containing asbestos. Other than screwing the backer board down, what can I do to assure the backer board stays put?
Thanks in advance!