Fixing Cracks in Plaster Walls: Causes and Long-term Solutions

Posted on 23-08-2023 11:44 AM

Plaster walls can add charm and character to any home, but over time, they might develop cracks that can mar their beauty and compromise their structural integrity.

Plaster cracks, though distressing, are not uncommon occurrences. They can arise for a multitude of reasons, ranging from minor blemishes to potentially more serious structural issues. Accurately identifying the type and severity of cracks becomes essential in determining the most suitable approach to undertake for repairs.

Causes of Plaster Wall Cracks

Plaster wall cracks can stem from various factors, ranging from settlement issues to temperature fluctuations. Understanding these causes is crucial for effective repair and prevention.

1. Settlement and Foundation Issues

Among the primary culprits behind plaster cracks lies the gradual settlement of a building's foundation. As a house settles over time, stress is exerted on its walls, often leading to the emergence of cracks. It is not uncommon to find such cracks forming near corners, doorways, and windows – areas that bear the brunt of the structural adjustments.

2. Temperature and Humidity Fluctuations

In regions experiencing dramatic shifts in temperature and humidity, plaster walls can undergo cycles of expansion and contraction. These fluctuations, in turn, create stresses that may manifest as cracks in the plaster. Such cracks can become particularly prominent in areas that witness extreme weather variations.

3. Poor Application and Workmanship

The art of applying plaster demands precision and skill. If not executed correctly, the plaster might develop weak points that are susceptible to cracking. Factors like improper mixing, uneven application, or even the use of incorrect plaster types can all contribute to this issue.

4. Structural Movements

The inherent movement of a building, arising from the natural settling of materials, as well as external influences like nearby construction, can lead to cracks in plaster walls. The ability of a structure to adjust and settle gracefully is key to avoiding such cracks.

5. Moisture Infiltration

Excessive moisture infiltration can gradually erode the integrity of plaster, causing it to crack and crumble. Leaking pipes, roof leaks, and poor ventilation can all introduce unwelcome moisture into the walls, setting the stage for potential cracks.

Assessing the Severity of Cracks

Determining the severity of plaster cracks, whether hairline or wide, is vital to devising appropriate solutions that ensure the long-term stability of your walls.

1. Hairline Cracks

Hairline cracks, often barely perceptible, are usually superficial and result from minor shifts in the building. These cracks tend to be more of a cosmetic concern and are relatively straightforward to repair.

2. Fine Cracks

Slightly wider than hairline cracks, fine cracks might indicate a more significant underlying issue. Addressing these cracks becomes imperative to prevent them from exacerbating over time.

3. Wide Cracks

Wider cracks can signal more serious problems, such as foundation issues or substantial settling. Immediate attention and intervention are crucial when dealing with such cracks to prevent further deterioration.

4. Diagonal vs. Vertical Cracks

The direction in which cracks propagate can offer insights into their causes. Diagonal cracks often point to foundation settling, whereas vertical cracks might stem from structural movements. This distinction aids in pinpointing the root issue.

Long-term Solutions for Plaster Wall Cracks

Discover enduring remedies to address plaster cracks, such as proper surface preparation and the application of flexible joint compounds, safeguarding your walls for years to come.

1. Proper Surface Preparation

Prior to initiating any repair work, meticulous surface preparation is paramount. Thoroughly eliminating loose plaster and debris from the crack area lays the foundation for a robust bond with the repair material.

2. Using Flexible Joint Compound

Opting for a flexible joint compound proves beneficial when remedying plaster cracks, as this compound can endure minor shifts without succumbing to further cracking.

3. Applying Reinforcing Mesh

For cracks of a wider nature, incorporating reinforcing mesh alongside the joint compound can impart added strength, effectively preventing future cracks from forming.

4. Addressing Underlying Structural Issues

Any repair endeavor will remain futile if underlying structural problems remain unaddressed. Professional assessment and intervention are crucial, especially for concerns relating to the foundation.

5. Regular Maintenance and Inspection

Conducting periodic visual checks to detect new cracks or variations in existing ones is a proactive measure. Nipping cracks in the bud prevents escalation, ultimately curbing the need for extensive repairs down the line.

Preventing Future Cracks

To thwart the emergence of future plaster cracks, consider implementing the following preventive measures:

Maintain Optimal Indoor Humidity: Strive for consistent indoor humidity levels to minimize the expansion and contraction of plaster.
Promptly Address Water Leaks: Timely rectification of water leaks prevents prolonged exposure to moisture that could undermine plaster integrity.
Ensure Adequate Ventilation: Adequate ventilation in moisture-prone areas, such as bathrooms and kitchens, discourages the accumulation of excess moisture.
Regular Foundation Checks: Periodic inspections of the foundation for signs of settling or structural issues are instrumental in early detection and mitigation.

DIY vs. Professional Repairs

The choice between DIY repairs and seeking professional assistance hinges on the severity and nature of the cracks. While minor cracks often lend themselves to DIY solutions, substantial or structural cracks mandate the expertise of professionals to ensure a comprehensive resolution.

Plaster wall cracks, although disconcerting, need not be an insurmountable challenge. Armed with an intricate grasp of their origins and armed with effective solutions, you possess the means to uphold the strength and aesthetic allure of your home's plaster walls.

Whether through hands-on DIY efforts or professional involvement, tending to plaster cracks promptly and adeptly stands as a cornerstone for safeguarding your home's overall structural integrity. Diligent upkeep and vigilant monitoring serve as the pillars of defense against recurrent cracks, affirming that your plaster walls continue to radiate timeless charm for generations to come.

Looking for Professional Assistance?

For seamless plaster wall repair and maintenance, consider the expertise of Perth Ceiling and Walls. With years of experience and a team of skilled professionals, we specialize in restoring the integrity and beauty of your plaster walls.

From assessing cracks to implementing durable solutions, our commitment to excellence ensures a home that remains both secure and stunning. Contact them to experience the expertise of Perth Ceiling and Walls firsthand.