A Guide to Parging Repair

masonry company in Toronto

Parging is the process of applying a thin layer of mortar over the surface of a concrete wall to protect it from damage caused by weathering, water infiltration, and other environmental factors. Over time, the parging on a concrete wall may crack, chip, or peel away, requiring repair to prevent further damage. Let us discuss how to successfully conduct a parging repair in Canada.


Assessing the Damage  


Before you begin the parging repair, it is important to assess the damage to the concrete wall. Look for any cracks, chips, or areas where the parging has peeled away. Also, check for any signs of water infiltration or damage, such as discoloration or mould growth.


Cleaning the Surface


To prepare the concrete wall, the following step is to tidy up its surface. Employ a pressure washer or a stiff-bristled brush to eliminate dirt, debris, or any loose parging. You should also wear safety goggles and a dust mask to safeguard yourself from flying debris and dust.


Preparing the Mortar Mix


After ensuring that the surface is devoid of any dirt or moisture, you can proceed with the task of making the mortar mix. The mortar mix should be a blend of Portland cement, sand, and water. The ratio of each ingredient will depend on the specific manufacturer’s instructions. Follow the instructions carefully to ensure that the mix is the right consistency and strength for your repair.


Applying the Parging


Now it’s time to apply the parging. Start by dampening the surface of the concrete wall with a mist of water. This will help the mortar bond to the surface. Using a trowel, apply the mortar mix to the wall in small sections, working from the bottom up. Smooth out each section with the trowel and use a brush to create a textured finish. Repeat this process until the entire wall is covered.


Protecting the Parging


After the parging has been applied, be sure to protect it from water and other environmental factors. Apply a water-resistant sealer to the surface of the parging to prevent water infiltration. Carefully read and follow the manufacturer’s instructions as well.




Regular maintenance is important so your parging repair lasts for years to come. Inspect the parging regularly for any signs of damage or wear and tear. Make repairs as soon as possible to prevent further damage. Additionally, clean the surface of the parging regularly to remove any dirt, debris, or moss that may accumulate.




Parging repair is an important process for protecting the concrete walls of your home from damage caused by weathering, water infiltration, and other environmental factors. By following our tips, you can successfully conduct a parging repair in Canada. Remember to assess the damage, clean the surface, prepare the mortar mix, apply the parging, protect the parging, and maintain it regularly. With proper care and maintenance, your parging repair will last for years to come.


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