Handy Guide to Repairing a Concrete Floor

We can’t expect everything to be perfect, and sometimes, a newly finished concrete floor has imperfections. Not all cracks or dents can be easily covered with a carpet or vinyl flooring, so repairing a slab is the best choice for fixing the problem. We’ve put together this handy guide to repairing a concrete floor so that you can follow along and correct any issues, or prepare yourself for any work that may need doing if you have a concrete floor.

Make Sure Your Concrete Is Structurally Sound

First of all, you will need to inspect the concrete to make sure that there are no larger problems at hand. Some surface defects are just symptoms of something much bigger, so you will need to have a professional assess whether patching is the correct solution. If you’re free to patch, you can determine the scope of the problem. Look out for ridges or humps, expansion or contraction cracks, debris floating out, damage caused by heavy objects and surface scaling.

Chip The Surface Of The Concrete

By chipping the concrete, you can remove any high material and create a rough surface for the repair cement mixture to bond to. For a small job, you can use a chipping hammer, but for much larger repairs, you will need an electric chipping hammer or even a jackhammer. Once chipped, use a wire brush, paintbrush or stiff bristled broom to clean away dust and debris.

Mix The Cement/Sand Material

If you have purchased dry ingredients, measure those out first into a container before adding latex or a polymerised liquid bonding agent. Alternatively, you can purchase pre-made mortar that has been designed to repair cracked and damaged concrete. This is available at Paints4Trade, along with many commercial paints to finish your floor.

Dampen The Area

Using fresh, clean water, wet the area where the patch will be applied. Be sure not to flood the area, but make sure it is dampened to help in adhering the new cement mixture, as well as keeping the mixture from drying too quickly. If the surface was left dry, it would draw the moisture from the cement mixture too quickly, causing it to shrink and crack,

Scoop The Mixture Out Of The Container

With a bull-nosed pointing trowel or another suitable tool, scoop out some of your cement mixtures and place it onto the patch location, working it in forcefully to remove any air bubbles. Using the trowel again, level the surface of the wet cement, leaving it slightly higher than the adjacent edges to allow for settling and shrinkage. Let it dry for an hour or so, depending on humidity and temperature.

Use A Steel Finishing Trowel

When the patch material has become stiff, use a steel finishing trowel to flatten and smooth the surface. Allow the area the area to dry for another hour or two so that it becomes harder, and then use the edge of the trowel to shave or scrape off any cement that has spread to the adjacent, finished surface.

Once the patch has fully dried and you’ve cleaned off the excess from your tools, you’re done. Then you can move on to finishing the floor with paint, gloss or a simple carpet to create a floor that you’re proud of.

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