How to Fix Cracks in Thin Brick How to Fix Cracks in Thin Brick

What You'll Need
Putty knife
Slim paintbrush
Scrubbing brush
Safety goggles
Disposable container
Scrap cardboard
Water hose

Whether or not thin brick is exposed to the elements, it is possible for it to occasionally suffer from the odd crack. While many will barely be noticeable, other larger cracks can be unsightly enough to require repair. By following our steps for the procedure, you will find it possible to fix cracks in the brick in order to rectify the façade.

Step 1 – Clean

Prepare the thin brick for repair by cleaning it to ensure that the repair compound takes as it should. Don a pair of goggles before beginning this step to prevent any injury from particles flying into your eyes. Position the ladder close to the wall where you can comfortably reach the wall without over-reaching. Use a hammer and chisel where the wall comprises particles that are cracked but remain in place. Follow this by using a paintbrush to draw the particles out of the crack, gently working the bristles into each crack to remove any loose particles. Rub the exposed surface with a scrubbing brush to remove any dust and debris to prevent it from working its way into the crack that needs to be fixed. Throughout this step, it is best to start at the top and work your way down.        

Step 2 – Mix Repair Compound

Mix the mortar that will be used to repair the thin brick in accordance with the instructions in a disposable container. Combine the mixture by stirring it thoroughly while gradually adding water. Once you get the desired consistency, test the mortar by spreading a little on a scrap piece of cardboard. Leave it to dry so that you can determine that the color matches the thin brick surface to be repaired. If necessary, add dye at this stage and complete further tests to get the right color.    

Step 3 – Apply

Rinse the surface to be repaired with a water hose so that the cracks are left damp. Gather a small quantity of mortar onto the tip of a putty knife and apply it into the recess created by the crack in the thin brick surface. Insert a layer to the deepest point and gradually build it up until the entire gap is filled. Use a trowel with a thinner tip if necessary to work the mortar deep and avoid any air bubbles by forcing it into the furthest point of the crevice. Scrape the edge of the trowel over the surface to remove any excess.  

Step 4 – Cure and Finish    

Use the tools at your disposal to create an effect to the repair sites so that they match the surrounding surface. For example, the bristles of a scrubbing brush can be used to make small depressions. Leave the repair sites to dry for at least a week and, during this period, rinse the surface with water to aid the curing process.

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