What You Really Need To DIY Concrete Countertops

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You might be surprised to learn that concrete countertops cost around the same as basic granite, about $65 per square foot. Since concrete is significantly cheaper than granite, the increased cost comes from the labor involved. If you DIY your concrete countertops, you can save a lot of money. But one of the essential things to consider before building DIY concrete countertops is what tools and materials you'll need. We'll break it down into the materials that are used to build the form, as well as the tools, since they can be the most expensive factor. 

To make concrete countertops, you start by creating a mold. Melamine-coated particleboard is the best material to build your mold from, as it will make it easy to remove the countertops after they set. You'll need screws to hold it together, as well as silicone caulk and tape to prevent leaks. Because concrete is so heavy, your mold will need to be supported by a frame made from 2-by-4 pine boards. Mesh or rebar will reinforce the concrete, so the counters are more stable. If your countertops will include cutouts for your sink and faucet, you'll use foam insulation panels, glue, and painter's tape to create these in the mold. 

Once you're ready to pour the molds, you'll need concrete mix. Quikrete's Countertop Mix is specifically designed for this. You can use a 5-gallon bucket to mix it. If you want to change the color, you can add pigment. And a wire to attach the mesh to the form. You'll also use plastic sheeting to cover the molds while they cure. Finally, you'll need to apply sealant after installing your concrete countertops. If you want to achieve a glossy finish by waxing your concrete countertops, you can use it after the sealant. 

If you're an experienced DIYer, you may already have many of the tools you'll need to build concrete countertop forms on hand. You'll use a tape measure throughout the project to make sure your countertops are the right size. You'll use a tablesaw to cut your melamine particle board to size and cut the strips for the side of the mold. A clamp will hold your mold in place after it has been glued. If you're adding cutouts, you'll need a jigsaw to cut the foam insulation panels to size.

You'll also want access to a drill for pre-drilling holes, securing screws, and mixing the concrete — which a paddle attachment for your drill will make quick work of. Each concrete mold will sit on two sawhorses. You'll use shovels or scoops to fill the molds and a float to smooth out the concrete. A rubber mallet or orbital sander can help you remove air bubbles. You'll also need a trowel to smooth out the bottom of your countertops. Finally, to remove the countertops from the mold, a putty knife will come in handy. If building DIY countertops seems overwhelming, but you love the look, here's what you need to know before buying concrete countertops.