HOW THICK ARE CONCRETE COUNTER- TOPS? Standard thickness is 1 1/2” with a minimum of 1 1/4” and maximum of 3”. Any thickness beyond 3” can be achieved using techniques to give the appear- ance of the desired thickness, yet still maintain weight and size within desirable limits.

How thick should my concrete countertop be?

1 ½ to 2 inches

The standard concrete countertop slab thickness is 1 ½ to 2 inches, similar to countertops made of marble or granite. However, contractors can create the illusion of a thicker countertop by casting a drop-front edge.

What is the thinnest you can pour concrete countertops?

Mark Rogero, principal of Concreteworks, explains that of late there’s been “a major shift in reinforcement technology—we use fiberglass reinforcement in surface concrete that has made it stronger, thinner, and more refined than the steel-reinforced concrete of the past.” Now concrete counters can be as thin as three-

Does a concrete countertop need rebar?

Concrete countertops are not supported by a subgrade, as are floors and other slabs. They are like cantilevers and must be reinforced to limit structural cracking and ensure sufficient tensile strength and ductility.

Can I use high strength concrete for countertops?

The best concrete mix for countertops is one with high compressive strength, smaller, rounder stones and some flexibility. QUIKRETE® Countertop Mix (No. 1106-80, -81) is a specially formulated high-strength concrete mix for pre-cast and cast-in-place concrete countertops.

Do concrete countertops crack?

A: Yes. Not always, but concrete countertops can develop hairline cracks. The cracks tend to be non-structural and result from the natural shrinkage of the concrete. However, some countertop cracks can be prevented.

What goes under concrete countertops?

The plywood for cast in place concrete countertops is a permanent portion of the formwork. The plywood simply serves only as a form bottom, to keep concrete out of the cabinets, and it ceases being necessary once the concrete cures.

How much rebar do I need for concrete countertops?

“There should be between 1/4-inch and no more than 3/8-inch of concrete between the bottom of the countertop and the reinforcement. And there should be at least 1/2-inch of concrete between the reinforcement and any edge,” he explains.

How much overhang should a concrete countertop have?


a. Overhangs -You can do up to a 12″ overhang without any additional support or reinforcement. All you will do is let your cement board overhang the cabinets. Remember the form will add another 1-1/2″ of overhang.

Do concrete countertops need aggregate?

The aggregate size plays an important role in concrete, and it will require smaller aggregate for precast projects, such as countertops. Heidebrink encourages contractors to work with 3/8-inch aggregate and smaller for a base of the wet cast concrete and avoid mixtures with more sand.

How long do concrete countertops last?

There’s no doubt concrete is rock solid and extremely durable. Concrete countertops will last you a lifetime, if properly sealed and maintained.

How long should concrete countertops cure before sealing?

4 days

With most quality concrete countertop mixes, 2 days following casting is a good start, although more time should be given during cooler periods, and more time is always better if you have time to give. For best results let your concrete cure for at least 4 days prior to sealing.

Can I use quikrete 5000 for countertops?

Quikrete 5000 is a commercial-grade concrete mix designed for projects such as footers, deck supports, patios and driveway aprons. You can also use it to create solid concrete countertops that you will later finish with an acid etch or cover over with tile.

How do you hide concrete countertop seams?

Quote from the video:
Quote from Youtube video: So just using this simple little flashing where they you know seam is is an incredible. Easy thing to do. And it makes just a little hairline joint there that's very inconspicuous.

Is concrete countertops cheaper than granite?

Generally, concrete countertops are not cheaper than granite. Concrete starts at around $65 per square foot, while basic granite can be as low as $40 a square foot. Concrete counters are an artisan product that come with higher labor costs.

What are the pros and cons of concrete countertops?

Pros and Cons of Concrete Countertops

  • Pro: Concrete is durable. The strength of the cement-and-sand mix alone has some hailing it as a rock solid (we had to) design choice. …
  • Con: But it can crack. …
  • Pro: Cracks can be fixed. …
  • Con: Concrete is susceptible to stains and scratches. …
  • Pro: So is basically everything else.

Can you put hot pots on concrete countertops?

Heat Resistant – As long as the proper sealer is used, concrete countertops are heat resistant. As a result, they can withstand heat from warm pots and pans. Easy Cleaning and Maintenance – For cleaning, a gentle commercial product, or just plain soap and water is all you need.

Do white concrete countertops stain?

Concrete countertops scratch & stain easily.

This is especially true for white concrete countertops! Cement is actually a pretty fragile surface that stains and cracks easily. It is also highly absorbent and must be sealed before you can use it in your kitchen.

How do you seal a concrete countertop?

Quote from the video:
Quote from Youtube video: Option number one is a concrete countertop sealer made by chain. I had a special order this off of Amazon for around $30. It's a water-based clear coat satin finish and it's also a food-grade.

How many coats of sealer do I need for concrete countertops?

Apply two liberal coats with a brush or paint pad. Generally, additional coats will not affect appearance, but may leave a residue if over applied.

How do you make concrete countertops smooth and shiny?

If you want to achieve an ultra-smooth, seamless surface, then polishing or sanding the concrete after it’s cast is the best approach. Polishing can also be used to expose decorative aggregate, glass, or stone within the concrete, resulting in terrazzo-like finishes.