How To Fix A Bad Concrete Job

Concrete is a popular building material that has been used for centuries. It is a versatile material, which means it can be used in many different ways to create structures of all sorts. Concrete jobs are often done by contractors and builders who specialize in this type of work.

How To Fix A Bad Concrete Job

However, there might come a time when you need to do some concrete repair on your own home or at the office. This article will show you how to fix a bad concrete job with just the basics from your local hardware store!

Materials Needed

  • Bucket
  • Water
  • Cement mix
  • Leveler or additive (optional)
  • Hammer and chisel
  • Drill with an augur bit attachment  (optional)
  • Level or a laser level
  • Safety goggles 
  • Ear protection

Instructions: How to Fix a Bad Concrete Job

Step One:

Make sure the median is wet or slushy before pouring in your cement mix and leveler. Otherwise, it will be difficult to properly smooth out the concrete as you are working on the project. If there are any areas of higher ground, use this to your advantage and place some of the concrete in those areas.

Make Sure the Median Is Wet or Slushy

Step Two:

Use a level or laser leveling device to check for any unwanted high points you need to take care of before smoothing out the cement.

Step Three:

Smooth the wet concrete with a trowel, steel shovel, or squeegee by dragging it over one section at a time while using downward pressure on each pass. This will help make sure that ridges from previous passes are removed and remove air pockets from between slabs which can create large voids when dried if not dealt with early on.

Step Four:

Let dry overnight, then come back and put down an additional layer of sealant (cement) mixed with sand in a ratio of one part sealant to two parts sand.

Let Dry Overnight

Step Five:

Drag a squeegee perpendicular to the first layer of sealant. This will help ensure that all air pockets are removed and that there is no excess moisture present in the concrete.

Step Six:

Go spray down your concrete surface with water, using as much volume of water as possible to remove any remaining dirt or dust particles from the surface before walking on it. This will also help the sealant to bond better with the concrete.

Step Seven:

Continue spraying water over your surface for a maximum of two hours after finishing your work, and make sure that you keep wetting down any area where there might be dust or dirt particles accumulating. This will ensure that those areas stay sealed properly.

Things to Consider for Fixing a Bad Concrete

Buckling: Sometimes, when new homes are being built, the contractor might skimp on reinforcing the outside of walls with rebar. This will cause the concrete to buckle as it dries.

Cracking: Cracks can happen if there are no rebar reinforcements for new homes or pour too fast on a hot day and cold mix hits your freshly poured concrete- this causes it to shrink and crack!

Mitigating Agents: The best way to fix any of these problems is by using special additives like portland cement stabilizers that have been designed especially for fixing bad concrete jobs.

You should also use bentonite clay which helps with water absorption in all types of material, including brick, mortar, cinder block, etc. So be sure not to forget that when patching up old cracks in foundations etc.

Tips & Warnings

1) Be sure to measure twice and cut once when cutting boards for use as levelers, so they are even across all portions! A good rule of thumb is placing them at least every eight feet and in a pattern that alternates from left to right.

2) Remember to use the appropriate PPE- safety glasses, gloves, etc.- when working with concrete or other hazardous substances!

3) Mixing concrete in a wheelbarrow is the easiest way to transport it, but you can also use a bucket or pail.

4) Be sure not to pour water on fresh cement. This will cause it to dry too fast and become brittle- that’s how some of your “concrete” may have come out cracked after all!

5) Use temp strips/laser thermometer if you’re unsure about what temperature the product should be before pouring. The liquid mix needs to have reached at least 60 degrees Fahrenheit for best results (though this varies depending on where you live).


Fixing a bad concrete job is not always easy. You could be left with the ugly, unsightly results of improperly mixed cement and other materials that have caused your project to fail miserably.

However, there are several steps you can take to fix the problem before it becomes worse. In this blog post, we have gone over how to fix a bad concrete job and mistakes you should avoid when trying to do so.  If you would rather have time to take care of this problem, follow our step-by-step guide on this topic.

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