Concrete has moved indoors from driveways and sidewalks as a popular choice for countertops. Don’t picture a flat slab of gray concrete sitting on top of your kitchen cabinets, though—concrete can have a variety of finishes from unembellished to sleek and modern. For a more textured look, the countertop can be embedded with marble fragments, glass chips, or even fossils. Concrete countertops can be shaped to fit any kitchen and can even be used to create different types of work surfaces such as cutting boards.
Concrete, which is made of cement, aggregate, and other additives, is a sustainable material. All its components are abundant and natural, making it an ideal option for homeowners concerned with having a green lifestyle.
Concrete countertops do require more maintenance than traditional materials. Because it’s porous, liquid can be absorbed and damage the surface. Especially damaging are highly acidic liquids such as vinegar, citrus juices, and wine. Although concrete countertops are sealed to prevent staining, the sealant may be broken down by heat or chipped by knives or other sharp implements.
Concrete is not flexible, so, as it settles, hairline cracks may appear in the surface. These are only superficial and will not affect the countertop’s durability. If the sealant is kept in good condition, the cracks shouldn’t become discolored—depending on your aesthetic, they may even add to the appeal of the countertop.
Installing a concrete countertop is best left to a professional fabricator since the type of materials used can require precise mixing and pouring to create the desired surface. Every professional has his or her own proprietary method for finishing concrete countertops. And fabricators can also properly reinforce the concrete with fiberglass, rebar, or wire mesh as needed.
Ask around to find a reputable fabricator and then request references so you can judge the work for yourself. Be sure to ask how the fabricator reinforces and seals the concrete—the countertop should not need any support for at least 3 feet, and epoxy sealants are generally the best (though most expensive) choice.
If you are eager to pour your own countertop, there are kits available that come with the necessary materials and tools. However, you should do a test cast offsite so you can experiment with techniques and finishes before you start on your kitchen.
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