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.

Yes, generally speaking if you install a separate color carpet in one room that requires a seam, you will either need to purchase additional carpet or use T- seams. T-seams make it possible to eliminate excessive waste.

There are several carpet fibers on the market that will essentially oxidize any organic liquid that comes in contact with the carpet. Additionally, and perhaps more importantly, there is padding that is designed with pets in mind that prevents liquid from reaching the decking.