Our new 1960s old home has a full basement but is unfinished. The previous owners had carpet down there but removed it due to a damp spring. After removal, they place 1/4 inch cement board, and did it without adhering it to the floor. I would like to utilize this cement board and install 12×12 ceramic tiles. After inspecting what was under neath the cement board, I found asbestos tile. How can I adhere the board to the floor l, without disturbing the asbestos? Glue? Hammer drill screws? Both ?