What Causes Your Concrete to Crack

Welcome to our latest blog at Project Landscape, your trusted Calgary concrete installers. Today, we’re addressing a common question among homeowners: why does concrete crack? Understanding these causes is key to maintaining the integrity of your concrete installations. Join us as we explore the top reasons behind concrete cracks and how choosing the right Calgary concrete contractors can make all the difference.

Table of contents

1. Poor Material Selections
2. Ground Movement
3. Improper Base Installation
4. Poor Drying Management
5. Adding Too Much Weight

Poor Material Selections
One of the primary culprits behind cracked concrete is poor material selection. As experienced Calgary concrete installers, we at Project Landscape have seen how the right (or wrong) materials can significantly impact the longevity and integrity of your concrete installations.
Importance of Quality Materials:
Quality is king when it comes to concrete. The strength and durability of concrete depend heavily on the components used in its mix. This includes the right balance of cement, water, aggregates (like sand and gravel), and any admixtures. Using low-grade materials or incorrect proportions can lead to weak concrete that’s prone to cracking.
Impact on Longevity and Durability:
High-quality materials may cost more upfront, but they pay off in the long run. They ensure your concrete can withstand the rigors of Calgary’s weather, resist wear and tear, and maintain its appearance over time. Poor material choices, on the other hand, can lead to premature deterioration, frequent repairs, and ultimately, a higher cost over the life of your concrete.
2. Ground Movement
The stability of concrete is heavily influenced by the ground it rests upon. In Calgary, where soil conditions can vary, understanding and preparing for ground movement is essential. As premier Calgary concrete contractors, we at Project Landscape are well-versed in addressing these challenges to prevent concrete cracking.
How Natural Soil Shifts Affect Concrete:
Concrete is a rigid material that, while strong, doesn’t flex well under stress. Soil beneath the concrete can shift due to various reasons like moisture changes, freeze-thaw cycles, and even the type of soil itself. Clay soils, for example, expand and contract significantly with moisture changes, which can lead to movement and eventually, cracking in the concrete above.
Mitigation Strategies:
To combat the effects of ground movement, several strategies can be implemented during the concrete installation process. This includes proper site preparation, using a well-compacted gravel base to provide stability, and considering the use of control joints in the concrete. These joints are designed to allow concrete to crack in a controlled manner, at predetermined locations, thereby reducing random cracking.

3. Improper Base Installation
A strong foundation is as crucial for concrete as it is for buildings. At Project Landscape, a top-rated concrete installer in Calgary, we emphasize the importance of a properly installed base for preventing concrete cracks.
The Role of a Proper Foundation:
The base or sub-base is the layer beneath your concrete. It serves several vital functions: it provides a level surface for the concrete, ensures proper drainage, and helps distribute weight evenly. An improperly installed base can lead to issues like uneven settling or shifting, which are common causes of cracking in concrete.

Common Installation Mistakes:
Some of the frequent mistakes we’ve observed in Calgary concrete installations include not using a suitable material for the base, insufficient compaction, and inadequate depth. Each of these can compromise the integrity of the concrete slab. For example, using too fine or organic-rich soil in the base can retain moisture and lead to expansion, while insufficient compaction can result in uneven settling.

4. Poor Drying Management
Proper drying and curing are pivotal in the life of a concrete structure. At Project Landscape, one of Calgary’s leading concrete contractors, we understand how concrete dries can make a significant difference in its long-term durability and resistance to cracking.
The Concrete Curing Process:
Curing is not just about letting the concrete dry; it’s a chemical process where the concrete gains strength. This period is crucial, and managing it poorly can lead to a host of issues, including cracking. Rapid drying can cause the concrete to shrink unevenly, creating stress that results in cracks. Optimal curing conditions involve maintaining the right level of moisture and temperature to allow the concrete to develop its full strength.

Best Practices for Drying:
To manage the drying process effectively, certain best practices should be followed. These include using curing compounds that help retain moisture in the concrete, maintaining a consistent temperature, and avoiding any external stress on the concrete surface during the curing period. As top-rated concrete installers in Calgary, we at Project Landscape ensure that these practices are meticulously followed for every project, large or small.

5. Adding Too Much Weight
A commonly overlooked aspect of concrete maintenance is understanding and respecting its weight capacity. At Project Landscape, your trusted Calgary concrete installers, we prioritize educating our clients about the importance of this factor in preserving the longevity of their concrete installations.

Understanding Load Capacity:
Every concrete structure is designed to withstand a certain amount of weight. This capacity depends on various factors, including the thickness of the concrete, the quality of the materials used, and the underlying base and soil conditions. Exceeding this capacity can cause stress on the concrete, leading to cracks or even more severe structural damage.
Consequences of Overloading:
Placing too much weight on a concrete patio, driveway, or walkway can lead to issues beyond just surface cracks. It can cause the concrete to sink or heave, especially if the base or subsoil is not adequately prepared to handle the load. It’s essential to consider the weight of vehicles, equipment, or any large structures that will be placed on the concrete to prevent overloading.

Understanding the reasons behind concrete cracking is essential for any homeowner looking to maintain their property’s aesthetic and structural integrity. As we’ve explored in this blog, factors like poor material selections, ground movement, improper base installation, poor drying management, and adding too much weight play significant roles in the health of your concrete installations.

Remember, when it comes to concrete, cutting corners can lead to costly repairs down the line. Investing in quality materials, professional installation, and proper maintenance can save you both time and money. If you’re experiencing any of the issues discussed or just looking for expert advice on concrete installation in Calgary, don’t hesitate to reach out to us at Project Landscape. We’re here to help you build and maintain a beautiful and durable outdoor space.