Fix My Cabinet

Through the years I’ve replaced many kitchen cabinet and bathroom vanity sink   bottoms. There are two methods of doing this. One way is by tearing out the old one completely and installing a new piece of wood. The other repair method entails covering over the existing board with a new one. If you think you need to remove mold from under the cabinet, then you will need to rip the old bottom out. Read this article on mildew around cabinets.

read Does Your Cabinet Sink Bottom Need to be Replaced

Why would you want to replace kitchen or bathroom vanity cabinet toe bases? IF you have had any extensive water damage and there is evidence of swelling, then you should replace the toe kicks. If you are certain that the bottoms of the actual cabinetry boxes were not affected, then it’s fine to only tear out the toe bases.
read JHow To Replace Cabinet Kick Plates