Bathroom vanity cabinets are a staple of many homes. These compact multi-purpose units store bathroom essentials in drawers, hide cleaning products, and of course, act as a base for the bathroom vanity top and sink. You’ll find innumerable vanity tops available for purchase that fit your vanity cabinet. Another way to add a countertop is to pour your own concrete vanity top.
If the project sounds far-fetched, it’s anything but. For any do-it-yourselfer with a creative bent, making a concrete vanity top is fun and low-cost—plus you’ll have a counter that you truly can call your own.
Basics of Pouring a Perfect Concrete Vanity Top
Form the Concrete Upside-Down
Many of those immaculately smooth concrete countertops you see in high-end kitchens are made with a secret: an upside-down concrete form. Professional concrete technicians are adept at pouring upright countertops and smoothing the surface with trowels. But another way they achieve a glass-smooth finish is by pouring the concrete into an upside-down concrete form. The form’s perfectly flat bottom, sides, and beveled edges are transferred to the concrete vanity top, with very little post-molding work required.
Reinforce the Concrete
Concrete has excellent compressive strength but poor tensile strength. Concrete technicians embed metal rebar mesh inside of the concrete to improve its strength. As a do-it-yourselfer, you can do this, too. Home centers sell small sections of rebar mesh that are perfect for making concrete vanity tops. The mesh is easy to cut with a hacksaw.
Vibrate the Concrete
Poured concrete contains voids can partially be eliminated by pushing the concrete around. Vibrating the mixture helps to force trapped air out, resulting in a denser, stronger countertop. Tapping the form with a rubber mallet or a hammer can do this. You can use any tool around your shop that vibrates, such as a sander, or you can rent a small electrically operated concrete vibrator for a day or two from a local rental yard.
Concrete is heavy. The volume of the concrete in this project is about .66 cubic feet or 100 pounds. Lift the vanity top and form with a partner. After you release the vanity top from the form, watch out of the edges. Even though you rounded down the edges in advance, some razor-sharp parts will remain. Wear gloves when handling the vanity top.