Foundation cracks, a common issue in homes, can jeopardize structural integrity. It’s crucial to distinguish between structural and non-structural cracks in concrete foundation repair. Narrow cracks, often manageable with DIY solutions, should be addressed promptly. However, wider cracks may demand professional intervention to ensure the foundation’s stability and safety. Understanding this difference is paramount for homeowners dealing with concrete foundation issues.

Key Takeaways:

Assessing Foundation Cracks

To effectively repair foundation cracks, it is essential to assess their type and severity accurately. This assessment helps determine the appropriate repair method and ensures that the underlying issues causing the cracks are addressed.

When assessing foundation cracks, several factors should be considered:

Narrow, non-structural cracks may not require professional intervention and can be repaired as a DIY project. However, wider structural cracks may indicate underlying foundation problems and should be assessed by a qualified concreting professional to determine the appropriate course of action.

Example of Foundation Crack Assessment

For example, a homeowner notices a narrow, vertical crack in the basement wall measuring about 1/8 inch in width. There are no accompanying symptoms, and the crack does not appear to be expanding. Based on these observations, the crack is likely non-structural and can be repaired as a DIY project using appropriate materials.

Alternatively, if a homeowner discovers a more comprehensive, horizontal crack in the foundation wall measuring 1/2 inch in width and observes accompanying symptoms such as uneven floors and doors that no longer close correctly, this indicates a structural issue, in this case, professional intervention is recommended to assess the extent of the damage and provide the necessary repairs.

Factors Narrow, Non-structural Cracks Wider, Structural Cracks
Accompanying Symptoms Minimal or none Visible structural damage
Direction Vertical or diagonal Horizontal
Length Stable Expanding or unstable
Location Varies Varies
Presence of Displacement No Yes
Width Less than 1/4 inch More than 1/4 inch

Gathering Supplies for Crack Repair

Gathering suitable materials before repairing foundation cracks is crucial for effective repairs. Different cracks may require specific supplies to ensure a long-lasting and durable repair. Here are some essential foundation repair supplies:

1. Caulking Gun

A caulking gun is a tool used to apply sealants or adhesives into cracks and gaps. It allows for precise and controlled dispensing of materials, ensuring proper coverage.

2. Epoxy or Polyurethane Injection

Epoxy or polyurethane injection is used for narrow cracks in concrete foundations. These materials penetrate and fill the cracks, providing structural stability and preventing further damage.

3. Hydraulic Cement

Hydraulic cement is specifically designed to repair wider cracks in concrete foundations. It sets rapidly and provides a robust, waterproof seal to prevent water infiltration.

4. Masonry Patching Compound

Masonry patching compound is used to repair surface imperfections on concrete foundations. It fills in small cracks, chips, and divots, restoring the smooth appearance of the foundation.

5. Wire Brush or Chisel

A wire brush or chisel must clean and prepare the crack before applying the repair materials. These tools help remove loose debris and create a clean surface for better adhesion.

Having these foundation repair supplies on hand will ensure that you are prepared to address various types of cracks in concrete foundations. With suitable materials and tools, you can effectively repair and restore the stability of your foundation.

Foundation Repair Supplies Appropriate Cracks
Epoxy or Polyurethane Injection Narrow cracks
Hydraulic Cement Wider cracks
Masonry Patching Compound Surface imperfections

Prepping Cracks for Repair

Proper preparation of foundation cracks is essential for ensuring successful repairs. Following a few steps, you can create an optimal bonding surface for the repair material, allowing for a more durable and long-lasting solution.

1. Widening Cracks

Widening cracks is often necessary to create a larger space for the repair material to adhere to the edges of the crack properly. This step helps prevent further cracking and ensures a stronger bond between the existing concrete and the repair material.

2. Cleaning Cracks

Before applying any repair material, cleaning the cracks thoroughly is crucial. Use a wire brush or chisel to remove loose debris, dirt, and old repair materials from the crack. Cleaning the cracks will enhance adhesion and improve the effectiveness of the repair.

3. Moistening the Surrounding Surfaces

Before applying the repair material, dampening the surrounding surfaces of the crack is vital. Moisten the area with water using a spray bottle or a brush. This ensures proper hydration of the repair material and promotes better bonding between the existing concrete and the repair material.

By following these prepping steps, you can maximize the effectiveness of your foundation crack repair and extend the lifespan of your concrete foundation.

Repairing Foundation Cracks

When it comes to fixing foundation cracks, the repair method depends on the type and severity of the crack. Narrow cracks can often be addressed with epoxy or polyurethane injections, while minor repairs may be suitable for concrete crack sealants. It is crucial to carefully follow the manufacturer’s instructions for each product to ensure a successful repair. Additionally, allowing the repaired area sufficient time to dry and cure is essential for long-lasting results.

Repair Methods:

It is important to note that these repair methods are best suited for inevitable cracks. For larger or more severe cracks, it is advisable to consult a professional foundation repair specialist who can accurately assess the situation and provide appropriate repair solutions.

Repair Method Crack Type Pros Cons
Epoxy Injection Narrow cracks
  • Provides strength and stability
  • Waterproof seal
  • Requires professional expertise
  • May not be suitable for wider cracks
Polyurethane Injection Narrow cracks
  • Expands to create a tight bond
  • Waterproof seal
  • Requires professional expertise
  • May not be suitable for wider cracks
Concrete Crack Sealant Minor cracks
  • Easy application
  • Prevents further water infiltration
  • May not provide as strong of a bond as injections
  • Not ideal for wider cracks

Sealing Repaired Cracks

After successfully repairing a foundation crack, proper sealing is crucial to prevent further water infiltration and potential damage. High-quality and flexible sealants designed explicitly for foundation repair are recommended to ensure long-lasting protection.

When sealing a repaired foundation crack, selecting a sealant that is compatible with the repair material and can effectively withstand the pressures and movements that may occur within the foundation is essential. These sealants are specifically formulated to provide a durable, watertight barrier, preventing moisture penetration and potential future cracks.

The process of applying the sealant is relatively straightforward. It can be done using a caulking gun or a trowel, depending on the size and accessibility of the crack. The sealant should be carefully and evenly applied, filling the gap. After using the adhesive, any excess should be smoothed out to ensure a uniform appearance and optimal sealing performance.

By sealing the repaired cracks, homeowners can enhance their foundation’s overall strength and stability, minimizing the risk of future cracks and water-related issues. Regular inspection and maintenance can help identify any new cracks or signs of deterioration that may require additional sealing or repairs.

Benefits of Properly Sealing Repaired Foundation Cracks
1. Prevents further water infiltration and damage
2. Enhances the strength and stability of the foundation
3. Reduces the risk of future cracks and related issues
4. Maintains the structural integrity of the home

Preventive Measures for Foundation Cracks

Taking proactive measures can help prevent foundation cracks. By implementing the following preventive measures, homeowners can protect the integrity of their foundation and avoid costly repairs:

  1. Avoid planting large trees close to the home: The expansive root systems of large trees can exert significant pressure on the foundation, leading to cracks. Planting trees at a safe distance from the house is advisable to minimize the risk of damage.
  2. Control irrigation practices: Overwatering the soil around the foundation can cause it to expand and contract, leading to foundation movement and cracks. Proper irrigation control, such as using a rain sensor or adjusting the sprinkler system, can help maintain stable soil moisture levels.
  3. Ensure proper grading from the foundation: The ground surrounding the foundation should be sloped away from the house to prevent water pooling near the foundation walls. Good grading facilitates the natural water flow away from the home, reducing the risk of foundation damage.
  4. Install landscaping features for water runoff control: Landscaping elements such as retaining walls, swales, and French drains can help divert water from the foundation. These features can effectively manage water runoff and prevent excess moisture accumulation.
  5. Maintain proper drainage systems: Regularly inspect and maintain gutters, downspouts, and drainage pipes to ensure they are clear of debris and functioning optimally. Properly working drainage systems facilitate efficient water removal from the property, minimizing moisture-related foundation issues.
  6. Monitor soil moisture levels: Investing in a soil moisture monitoring system can provide valuable insights into the moisture content around the foundation. By monitoring and maintaining appropriate soil moisture levels, homeowners can prevent excessive expansion or contraction of the soil, reducing the risk of foundation cracks.

Taking these preventive measures can significantly reduce the likelihood of foundation cracks and ensure the home’s long-term stability.

Preventive Measures


Avoid planting large trees close to the home Highly effective in preventing foundation damage
Control irrigation practices Significantly reduces soil moisture fluctuations
Ensure proper grading away from the foundation Effectively diverts water away from the home
Install landscaping features for water runoff control It provides additional protection against excess water near the foundation
Maintain proper drainage systems Ensures efficient removal of water from the property
Monitor soil moisture levels Allows proactive control of soil moisture, minimizing foundation risks

DIY vs. Pro for Foundation Repair

Regarding foundation repair, DIY enthusiasts may feel confident in tackling minor cracks on their own. However, it’s highly recommended to consult a professional foundation repair specialist for more extensive and more severe cracks. These licensed experts possess the necessary expertise and equipment to accurately assess the damage and provide long-lasting solutions that prioritize the safety and stability of your home.

While minor cracks can often be addressed through DIY methods, such as using epoxy or polyurethane injections, larger cracks may indicate more significant underlying issues. Attempting to fix these cracks without proper knowledge and experience can lead to inadequate repairs, exacerbating the problem and potentially compromising the structural integrity of your foundation.

A professional foundation repair specialist will thoroughly evaluate the cracks, identifying the root cause and determining the most appropriate repair approach. This may involve advanced techniques to ensure a comprehensive and lasting solution, such as hydraulic cement application or masonry patching compound.

Benefits of Hiring a Foundation Repair Specialist:

DIY Foundation Repair Professional Foundation Repair
May be suitable for minor cracks Can handle both minor and major cracks
Requires research and knowledge of proper repair techniques Relies on the expertise of trained professionals
May not address underlying issues Thorough assessment to identify underlying causes and address them appropriately
Potential for inadequate repairs, leading to further damage Ensures comprehensive and long-lasting repairs
Cost-saving option for minor repairs Provides value for money with professional expertise and quality repairs

Our Recommendation for Foundation Repair

Regarding foundation repair, it is crucial to seek the expertise of a certified structural engineer or qualified foundation expert. Their professional assessment can provide a comprehensive evaluation of the severity of foundation cracks and determine the best course of action to ensure the stability and safety of your home.

A certified structural engineer has the knowledge and expertise to diagnose foundation issues and accurately recommend appropriate repairs. They have undergone specialized training and are equipped with the necessary tools and techniques to assess the structural integrity of your home’s foundation.

Relying on a professional assessment allows you to make informed decisions and avoid potential pitfalls from DIY repairs or inaccurate diagnoses. By consulting a certified structural engineer or qualified foundation expert, you can have peace of mind knowing that your foundation repair will be based on expert analysis and industry best practices.

Benefits of Consulting a Certified Structural Engineer or Qualified Foundation Expert:

By prioritizing a professional assessment by a certified structural engineer or qualified foundation expert, you can ensure that your foundation repair is carried out effectively and efficiently, providing you with peace of mind and the assurance that your home is in good hands.

Benefits of Consulting a Certified Structural Engineer Benefits of Consulting a Qualified Foundation Expert
Accurate assessment of foundation cracks and associated risks Comprehensive evaluation of the structural integrity of your home
Expert recommendations for appropriate repairs Access to specialized tools and techniques
Minimization of potential DIY repair mistakes Long-term stability and safety of your home

Foundation Crack Repair Cost

When it comes to repairing foundation cracks, the cost can vary based on several factors. These include the extent and severity of the damage, the chosen repair method, and the property’s location.

It is essential to consult with a foundation repair specialist to obtain accurate cost estimates for specific cases. Professionals in the field have the expertise to assess the damage and recommend the most appropriate repair solutions.

A thorough assessment of the foundation cracks will help determine the necessary repairs and associated costs. In some cases, minor cracks may only require simple and affordable maintenance. However, more extensive damage may require more complex and costly repair techniques.

Here is a breakdown of the key factors that can influence the cost of repairing foundation cracks:

Sample Cost Comparison for Foundation Crack Repairs:

Repair Method Average Cost Range
Epoxy Injection for Narrow Cracks $300 – $800
Hydraulic Cement for Wider Cracks $500 – $1,500
Foundation Wall Reinforcement $2,000 – $6,000
Underpinning for Structural Repairs $10,000 – $30,000

Please note that the table provided is a general cost comparison and may not represent the exact prices you may encounter. The costs can also vary depending on other factors specific to your situation. It is always advisable to consult with a foundation repair specialist for accurate cost estimates.

By promptly addressing foundation cracks and investing in necessary repairs, homeowners can prevent further damage and avoid potentially more costly repairs.


Promptly addressing foundation cracks is crucial for maintaining a home’s structural integrity and safety. These cracks can worsen over time and lead to extensive damage if left untreated. Whether the cracks are narrow or wide, it is essential to take appropriate action to prevent further deterioration and ensure long-lasting stability for concrete foundations.

Proper assessment is the first step in addressing foundation cracks. By accurately determining the type and severity of the cracks, homeowners can make informed decisions about the necessary repairs. For narrower non-structural cracks, homeowners may take a DIY approach using epoxy or polyurethane injections. On the other hand, wider cracks that indicate more severe issues may require the expertise of a professional.

Implementing preventive measures is equally important in maintaining a strong and stable foundation. Avoid planting large trees too close to the home, as their roots can pressure the foundation. Control irrigation practices to prevent oversaturation of the soil, potentially leading to foundation movement. Ensure proper grading away from the foundation and consider installing landscaping features to manage water runoff effectively. Regular maintenance of drainage systems and monitoring of soil moisture levels can also help prevent foundation cracks.

Consulting experts when needed is critical to addressing foundation cracks effectively. Certified structural engineers or foundation repair specialists can provide professional assessments and recommend appropriate repairs. They have the knowledge, experience, and specialized equipment to accurately diagnose the problem and offer long-lasting solutions for the stability and safety of the home.


What is the difference between structural and non-structural foundation cracks?

Structural cracks compromise the integrity of the home’s foundation and require professional intervention. Non-structural cracks are narrower and may be suitable for DIY repairs.

How do I assess the severity of foundation cracks?

Consider accompanying symptoms, direction, length, location, displacement, and width. Narrow, non-structural cracks may not require professional intervention, while wider, structural cracks may indicate more severe problems.

What supplies do I need for repairing foundation cracks?

Essential supplies include a caulking gun, epoxy or polyurethane injection for narrow cracks, hydraulic cement for wider cracks, and masonry patching compound for surface imperfections. You may also need a wire brush or chisel to clean and prepare the crack for repair.

How do I prepare foundation cracks for repair?

Proper preparation involves widening the crack, cleaning away loose debris, and moistening the surrounding surfaces. This creates an optimal bonding surface for the repair material.

What methods should I use to repair foundation cracks?

Epoxy or polyurethane injections are often used for narrow cracks, while concrete crack sealants may suffice for minor repairs. Follow the manufacturer’s instructions and allow the repaired area to dry and cure properly.

How do I seal repaired foundation cracks?

Use a caulking gun or trowel to apply a high-quality, flexible sealant made explicitly for foundation repair. Fill the gap and smooth any excess to prevent further water infiltration and damage.

What preventive measures can I take to avoid foundation cracks?

Avoid planting large trees close to the home, control irrigation practices, ensure proper grading away from the foundation, install landscaping features for water runoff control, maintain adequate drainage systems, and monitor soil moisture levels.

Can I repair foundation cracks myself, or should I hire a professional?

DIY enthusiasts can handle minor cracks, but larger and more severe cracks may require professional intervention. Licensed foundation repair specialists have the expertise and equipment to assess damage and provide long-lasting solutions accurately.

What is your recommendation for repairing foundation cracks?

We recommend consulting a certified structural engineer or qualified foundation expert to assess the severity of cracks and determine the best course of action. They can provide a comprehensive evaluation and recommend appropriate repairs for the safety and stability of your home.

How much does it cost to repair foundation cracks?

The cost varies depending on factors like the extent and severity of the damage, the repair method used, and the location. Consulting with a foundation repair specialist can provide accurate cost estimates for your case.