How To Remove Mortar From Concrete Subfloor

How to Remove Mortar From Concrete Subfloor

Mortar, a mixture of cement, sand, and water, is commonly used to bond bricks, tiles, and stones together. However, when mortar spills onto a concrete subfloor, it can be unsightly and difficult to remove. Fortunately, there are several effective methods for removing mortar from concrete without damaging the underlying surface.

Method 1: Using a Hammer and Chisel

For small areas of mortar, a hammer and chisel can be used to break up and remove the material. Hold the chisel at a slight angle and tap it gently with the hammer until the mortar begins to crumble. Work slowly and carefully to avoid damaging the concrete subfloor.

Method 2: Using a Grinder

A grinder can be used to remove larger areas of mortar. Attach a diamond blade to the grinder and set the speed to medium. Hold the grinder at a low angle to the concrete surface and grind away the mortar. Be careful not to apply too much pressure, as this could damage the concrete.

Method 3: Using a Muriatic Acid Solution

Muriatic acid is a strong acid that can dissolve mortar. However, it is important to note that muriatic acid can also damage concrete if it is not used properly. To use this method, mix one part muriatic acid with ten parts water in a plastic bucket. Apply the solution to the mortar using a brush or sponge and let it sit for 15-20 minutes. Once the mortar has softened, scrub it away using a stiff brush or scraper.

Method 4: Using a Mortar Removal Tool

There are specialized mortar removal tools available that can be used to remove mortar from concrete subfloors. These tools typically consist of a blade or scraper attached to a long handle. To use a mortar removal tool, hold the tool at a slight angle and scrape away the mortar. Work slowly and carefully to avoid damaging the concrete subfloor.

Tips for Removing Mortar From Concrete Subfloor

Always wear protective gear, including gloves, eye protection, and a mask, when removing mortar from concrete.
Thoroughly clean the concrete subfloor after removing the mortar.
If the mortar is particularly thick or difficult to remove, it may be necessary to use a combination of methods.
Do not use excessive force when removing mortar, as this could damage the concrete subfloor.
If you are unsure about how to remove mortar from concrete, consult with a professional.