Best Ways To Repair Cracks of a Wall at Home

Repairing cracks in a wall is one of the most common renovations in a home. Cracks in walls can arise for various reasons, and their origin can be both superficial and structural.

Most common causes of cracks in walls:

  • Structure settlement: All structures, over time, undergo a settling process in the ground. If this settlement is uneven, it can generate stress in the construction, and, consequently, cracks will appear in the walls.
  • Expansion and contraction: Building materials tend to expand and contract with variations in temperature and humidity. These fluctuations can cause cracks, especially if the materials cannot move freely.
  • Moisture: Water infiltration can weaken building materials and cause cracks to appear. In addition, water can cause problems such as swelling, rot, or corrosion in different components of the wall.
  • Improper construction work: An improper mortar mix, the use of poor quality materials or incorrect application can lead to cracks appearing over time.
  • Seismic movements: In areas prone to earthquakes or telluric movements, the vibrations can generate cracks in the walls.
  • Soil pressure: In some cases, movement of the surrounding soil, whether from tree root growth or landslides, can put pressure on the walls and cause cracks.
  • Natural aging: Over time, materials wear and cracks may appear simply due to the natural aging of the construction.

To properly address wall cracks, it is essential to identify their underlying cause. While some cracks are superficial and cosmetic, others can signal more serious structural problems that require immediate attention.

Repair cracks in a wall step by step:

Repairing cracks in a wall is a process that, although it can vary depending on the type and severity of the crack, generally follows a series of basic steps.

Identification and Cleaning

According to Cambridge renovations experts,it is essential to identify the type of crack and its cause.

Once this is done, clean the affected area by removing dust, flaking paint, and any other impurities using a brush or vacuum cleaner.

Crack preparation

Using a putty knife or chisel, enlarge the crack slightly to create a uniform area where the filler material can adhere properly.

Application of putty

There are different products on the market, such as putties, pastes, or specific mortars for cracks. Mix or prepare the product according to the manufacturer’s instructions.

Apply it to the crack using a putty knife, making sure to fill the entire area well and remove any excess.

Sanding and finishing

Once the filler material has completely dried (time varies by product), use sandpaper to smooth the surface and ensure it is level with the rest of the wall. Eliminates dust generated by sanding.


If the wall was previously painted, you will likely need to touch up the repaired area so that it blends in with the rest of the surface. Sometimes, to achieve a uniform look, it is advisable to paint the entire wall.


If the crack was caused by a specific problem, such as moisture or structural settlement, it is crucial to address that problem to prevent future cracks. This may require consultation with construction or waterproofing professionals.

In cases of large fractures or if you suspect structural problems, it is advisable to consult a professional before making any repairs.

Advantages of contacting a professional repair company

Having a professional company repair fractures in a wall offers multiple benefits that go beyond simply correcting the aesthetic problem. These companies have the knowledge and experience necessary to guarantee a long-lasting and effective solution.

Specialized companies have technicians and professionals trained to identify the root cause of cracks. This is essential, as a superficial repair without addressing the underlying cause can lead to cracks reappearing over time.

Cracks, especially larger ones or those that appear in strategic locations, can represent a structural risk.

A professional company guarantees an accurate evaluation and an efficient solution, protecting the integrity of the home and the safety of its inhabitants. Contact The Renovators of Canada and get the best renovation services in all Greater Toronto Areas (GTA).

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