Can you concrete over concrete?

Asked By: Elyse Taranto | Last Updated: 12th June, 2020
Category: business and finance construction industry
4.8/5 (512 Views . 37 Votes)
Yes, you may pour a concrete pad overlay over an existing slab. You need to consider the added height and weight of the overlay on the existing structure. Overlays may include polymers, portland cement concrete, or epoxies. You should improve the drainage of the slab by having a good slope on the overlay.

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Likewise, people ask, is it OK to pour concrete over existing concrete?

If the existing concrete is in good shape structurally, you can pour new concrete over it to freshen it up. Proper prep work is key to success when layering new concrete over old. If the existing concrete is in good shape structurally, you can pour new concrete over it to freshen it up.

Beside above, can you pour concrete over dirt? Pour concrete over a solid, well-drained base Because concrete slabs “float” on the soil, soft ground or voids underneath may cause unsupported areas to crack under heavy weight like vehicles. Pack about 4 in. of sand or gravel over clay and other poorly draining soils to provide even support.

Also know, how thick does a concrete overlay have to be?

The minimum recommended thickness is 1 to 2 in. (25 to 50 mm) for a fully bonded concrete overlay placed on a base slab that is practically free of cracks and in which the concrete is sound, clean, and of good quality.

Does concrete resurfacing last?

Thanks to its advanced bonding properties, concrete resurfacing can last for quite a while. A properly resurfaced floor can last from 8-15 years.

27 Related Question Answers Found

What is concrete resurfacing?

Concrete resurfacing is a process by which concrete is cleaned, repaired, and overlaid with a new surface. Here is an overview of the steps involved for this fix to aging concrete: Cleaning.

How thin can you pour concrete over concrete?

Maybe and maybe not. If done properly, new concrete can often be poured right over an existing slab. For this to be feasible, the contractor needs to pour at least 2 inches thick, use smaller aggregate, and incorporate reinforcement such as welded wire mesh or fiber mixed into the concrete.

How do you make a sloped concrete ramp?

To create the slope of the ramp, build the sides of the form with pieces of plywood cut at an angle along the top. The key to shaping the concrete into a slope is to use a stiff mixture; if the concrete is too wet, it will slump down to the bottom of the ramp, seeking its own level.

Does stamped concrete crack?

Stamped concrete is highly resistant to cracking when installed correctly. Even if stamped concrete experiences minor cracking, the cracks are often hard to detect because they will often blend in with the pattern and joint lines.

Can you put pavers over concrete?


According to several paver manufacturers, paving blocks can be installed on top of concrete without mortar if you first lay down a 1/2″ to 1” bed of coarse sand. The process is nearly identical to laying a paver patio over ground. Before you begin, make sure your concrete is properly sloped and doesn't puddle.

Does mortar stick to concrete?

Concrete, mortar or similar materials are not designed to stick or bond to old surfaces. You will not get any satisfactory results if you simply add new mortar to old. It just doesn't work. Using a modified thinset mortar would be the preferred method for this type of installation.

How do you apply bonding adhesive to concrete?

Shake the container of concrete bonding adhesive vigorously for a couple of minutes before opening it. Then, pour a portion into a separate container and dilute with clean water; mix about one part adhesive with two parts water. The first application will serve as a primer for the final coat.

Will concrete overlay crack?

But overlays are only as good as the subbase they are applied to. They are not intended to fix bad concrete. If you put an overlay directly over a cracked surface, the overlay is likely to crack as well.

Can you stamp over old concrete?

You can only stamp concrete when it is still wet from a pour. To add texture to an existing patio, pour a fresh layer of concrete over the old and stamp it, provided the existing patio is in good condition. You can impress the look of brick work over a new concrete surface.

What is minimum thickness for concrete?


What is the minimum thickness for concrete? A: Concrete is typically applied at a thickness of 2 inches or more, but the thicker it is, the stronger the slab will be. Four inches is most common for a slab.

Can old concrete be resurfaced?

Resurface Old, Worn or Damaged Concrete
For a successful concrete resurfacing project, proper surface preparation is critical. Use only when the product, air, and surface temperatures are above 500F for a minimum of 24 hours. If not removed, Flo-Coat Concrete Resurfacer will not bond properly to the concrete surface.

How much does concrete overlay cost?

Concrete with a decorative overlay typically ranges in price from $7 to $12 per square foot while stamped concrete costs $8 to $20. Resurfacing breathes new life into a surface and costs less than installing a new slab.

What is the best concrete resurfacing product?

quikrete concrete resurfacer

How do you cover unsightly concrete?

Turn your lackluster cement patio into a more inviting space by covering it to make it more visually appealing. Several options are available. Make an unsightly cement patio pop.

Make an unsightly cement patio pop.
  1. Paint your cement patio.
  2. Tile the patio.
  3. Conceal the cement patio with modular wood tiles.
  4. Lay pavers.

How do you smooth concrete?


use steel finishing trowel for smooth texture
To finish the concrete, use a steel finishing trowel to achieve a smooth texture. The tool brings water to the surface of the concrete. Don't use too much water, but at the time same time, work the tool to create a smooth finish.