Compared to other products, you may find that tile and grout require less maintenance than other floors, but it is not maintenance free. Grout should be sealed and caulking needs to be maintained to prevent deterioration of the backer board.

Laminate floors are not attached to the subfloor. They float above on top of a dense cushion. As a result, they do have give when you walk on them.

We generally recommend that the underlayment be removed because the subfloor may not be adequate to support tile. However, if your existing vinyl floor was installed over an adequate subfloor using a full spread installation method then yes, it can be done if you use the proper installation products.