Concrete Countertops (Continued)
Concrete Countertops Information
 Concrete Countertop Problems
Don't leave acidic liquids - citrus juices, wines, vinegar, and
alcohol - on unsealed concrete, since they can etch into the surface. Also, oil and fat can soak in. Consider having raised strips of metal cast into countertops like runners or stainless
steel sheets molded around the cook top for hot pots and pans. These the metal will also protect against abrasion. Do not use abrasive pads or powders on sealed counters. Clean with warm
water and a non ammoniated, nonabrasive cleanser when not using a stone soap. Do not place hot objects or adhesive tapes on the waxed surface - they could cause the surface to become discolored.
Concrete Countertop Facts
Concrete countertops usually cost more than granite up to twice as much.
A 1.5" thick standard concrete countertop has an approximate weight of 18.75 pounds per
square foot. (Granite is approximately 18 pounds per square foot.) The countertop weight can be less if lightweight concrete is used. Though some countertop contractors will not use
lightweight concrete because it has less strength. Most building codes require a minimum design load for a floor of about 65lbs per square foot. A typical cabinet will support the concrete weight.
You may choose from a wide range of colorings for your countertops. Each contractor will have
different methods of coloring your countertop, ranging from integral coloring, broadcast color hardeners, and acid stainings. Most contractors can custom color match samples.
The real beauty of using concrete as a material for your countertop is that each cast is unique.
It's color, texture and porosity will vary depending on finishing technique, coloring, curing methods, and skill. They are true works of art and therefore.. no two are alike.
Concrete slabs should not exceed around 8' x 3'. Oversized slabs are usually hard to work with
and are also more likely to crack. This just means that for large applications seams may be required but they can become a very attractive element of the design.
Concrete counter tops may and often do get hairline cracking. This really does depend on the
method of construction, conditions during the installation and finishing techniques. Proponents often say these cracks add to the rustic feel of the final product. Most slabs should be
reinforced with steel and wire mesh, therefore the hairline cracks do not affect the structural integrity of the slabs.
Concrete countertops will stain and should have a sealer applied for water and stain resistance
. The type of sealer used on the concrete countertops varies depending on your situation and your personal preferences. They vary from food safe, water-based, acrylic, epoxy sealers, and
liquid wax. Concrete countertops will also burn if not protected from hot pans and can also be scratched so be careful if you choose this product.
Avoid abrasive soaps or cleansers. You can use a mild, non-abrasive, non ammoniated soap for
daily cleaning. Try Simple Green (dilute as suggested) or Dr. Bronner's natural soap (5 parts water, one part soap) and you should avoid using abrasive pads. In short, cleaning your
countertop is not going to be any more difficult than cleaning any other type of countertops. Follow the instructions provided by the countertop contractor- they will have experience with
what works for their product.
For more information check out books from Fu-Tung Cheng, the founder of the Concrete
Exchange, an internationally known designer and author, who has pioneered the craft of making concrete countertops. Fu-Tung Cheng's first book, Concrete Countertops: Designs, Forms, and
Finishes for the New Kitchen and Bath (Taunton Press, 2002) has become a national bestseller.
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