How to Ensure Your Contractor Polishes the Concrete Correctly?

How to Ensure Your Contractor Polishes the Concrete Correctly?

Now that you have decided to use polished concrete Kansas City flooring and have hired a contractor for it, you need to be sure that the concrete is polished in the right way. However, to be able to do that you should know more about the process of concrete polishing.

The process is very similar to the process of sanding wood. Here, contractors use machines that are laced with abrasives that are similar to sandpaper to grind down concrete surfaces. This is done till the surface develops the desired smoothness and shine.

So here is what your contactor should be doing to give you a nice looking polished concrete flooring.

  • Remove Existing Coatings

Make sure that your contactor first removes any existing coating from the surface. To do this the contactor may use a sandpaper like abrasive if the coating is thick.

  • Fill Up the Cracks

Once any existing coating is removed, you will start noticing cracks in the flooring. It is important to fill these cracks up before you start the next round of grinding or polishing. If the cracks are not filled up properly then they can show up on the flooring and spoil the whole look of it.

  • Grind the Concrete

This is the process where a grit metal bonded equipment is used. Grit is the particle size of a diamond that is used to achieve a glossy and mirror like finish and shine. The contractor should first grind with 30 or 40 grit metal bonded diamond. Once this is done, then the next grinding should be done with 80 grit metal bonded diamond. If still the desired finish is not achieved, then the contractor should use a 150 grit metal bonded diamond. This will give you a finer grinding and finish.

  • Apply Hardner

Once the concrete grinding has been done, your contractor should apply a chemical hardner to make the concrete dense. This will not only make it more sustainable but also give you a better result once polishing is done.

  • Polish the Surface

Here, the contractor should first polish the floor using a 100 grit resin bound diamond or a 200 grit one. The contractor can also use a combination of both. After the first round, the next subsequent rounds of polishing should be done with 400 grit resin bound diamond, then 800 grit, and then 1500 or 3000 grit resin bound diamond in a sequence. The last round of 1500 or 3000 grit can be done depending on the sheen that is expected by you.

There are two types of polishes usually done by contractors – wet polishing and dry polishing. Dry polishing is the method that is mostly preferred by contractors because it is faster and convenient. Wet polishing is a more effective method because water acts as a lubricant that can increase the life of the polishing abrasives. It can also eliminate grind dust better. However, it creates quite a slurry that needs to be disposed in ecofriendly manner.


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