Understanding Foundation Cracks: A Guide for Austin and San Antonio Homeowners
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Understanding Foundation Cracks: A Guide for Austin and San Antonio Homeowners

  • Writer: The Foundation Guru
    The Foundation Guru
  • Nov 21
  • 3 min read

Updated: 2 hours ago

Why 1/4 Inch Cracks Need Attention


Concrete cracks smaller than 1/4 inch are often cosmetic and do not affect the structural integrity of a home. However, cracks that are 1/4 inch or wider can lead to further issues such as:


  • Foundation weakening

  • Moisture intrusion

  • Increased crack width over time


In cities like San Antonio and Austin, concrete epoxy is an excellent solution for repairing wider concrete cracks. This technique restores the slab's strength and prevents moisture from seeping in.


Stitching is another method used to repair larger concrete cracks. This technique requires more skill and expertise compared to using concrete epoxy. It involves drilling holes and cutting slots into the concrete slab, inserting rebar, and then sealing it with a concrete epoxy.


Surface Preparation: The crack is exposed, cleaned, and any loose debris or concrete is removed.
Surface Preparation: The crack is exposed, cleaned, and any loose debris or concrete is removed.

Common Causes of Wide Concrete Cracks


Understanding why cracks form helps homeowners recognize when to seek foundation crack repair. The most frequent causes include:


Thermal Expansion and Contraction


Concrete expands and contracts with temperature changes. This movement can cause corner cracks, especially where slabs meet walls or other structures. These cracks often appear on exterior surfaces but can also show up inside garages or on exposed concrete floors.


Moisture and Soil Movement


In San Antonio and Austin, the soil expands when wet and contracts during dry spells. This shifting places stress on the foundation slab, leading to cracks that gradually widen. Similarly, exterior cracks in patios, walkways, and driveways are prone to develop due to moisture and soil movement.


Structural Load and Settlement


Heavy loads or uneven settling of the soil beneath the slab can create stress points. These stresses cause cracks to form or grow, especially in older homes or those built on less stable ground.


Epoxy filling in the curing stage.
Epoxy filling in the curing stage.

Why Concrete Epoxy Is a Preferred Foundation Repair Method


Epoxy is widely recommended for foundation repair in San Antonio and Austin because it offers several benefits:


  • Strong Bonding: Epoxy fills the crack and bonds the concrete back together, restoring structural integrity.

  • Waterproof Seal: It prevents moisture from entering the crack, stopping further damage.

  • Durability: Epoxy repairs last for many years without needing replacement.

  • Minimal Disruption: The process is clean and quick, often requiring removal of only small sections of flooring or skim coat.


Sometimes, the exterior cosmetic skim coat layer must be removed to access the slab crack for proper repair. In other cases, flooring like tile or carpet may need temporary removal to ensure the epoxy fills the crack completely.


Keep in mind that there are alternative options for repairing concrete cracks. Each foundation repair technique demands a specific level of skill and expertise. The Foundation Guru offers assistance to homeowners in the Austin and San Antonio regions by providing an evaluation to identify the most suitable repair method.


Cracked driveway.
Cracked driveway.

Steps Involved in Epoxy Crack Repair


  1. Foundation Inspection - San Antonio or Austin: A foundation inspection identifies all cracks needing repair and assesses the foundation’s overall condition.

  2. Surface Preparation: The crack is exposed, cleaned, and any loose debris or concrete is removed.

  3. Epoxy Injection: Epoxy is injected to fill the crack completely.

  4. Curing: The epoxy hardens, bonding the crack edges.

  5. Finishing: Any removed flooring or skim coat is replaced or resurfaced.


This process is effective for cracks in slab foundations, garage floors, and exterior concrete surfaces like patios and driveways.


Preventing Future Cracks and Damage


After foundation crack repair, homeowners can take steps to reduce the risk of new cracks forming:


  • Maintain proper drainage around the home to keep soil moisture stable.

  • Avoid planting large trees too close to the foundation.

  • Schedule regular foundation inspections with The Foundation Guru in San Antonio or Austin to catch issues early.

  • Repair exterior cracks in patios and walkways promptly to prevent moisture entry.


Cracked patio slab.
Cracked patio slab.

What Austin and San Antonio Residents Should Know


Investing in foundation repair can enhance the safety and value of your home. For residents in Austin and San Antonio, selecting the appropriate repair method is crucial.


If you notice cracks in your foundation slab, garage floor, or exterior concrete surfaces, don't ignore them. Whether you're in San Antonio or Austin, contact us for a professional and thorough foundation inspection.


Early action can save you thousands in future repairs and protect your home's structural integrity.


The Foundation Guru

Office: 512-545-8387 (call or text)


For more information or to book an inspection, visit our website at The Foundation Guru.


Empower yourself with knowledge and ensure the longevity of your home by choosing The Foundation Guru for all your foundation inspection needs.

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The Foundation Guru

512-545-8387

Austin, Texas

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