Block and base foundations, often found in older homes or in areas with expansive soils, offer certain advantages like affordability and ease of access for repairs. However, like any foundation type, they are prone to certain issues that can compromise the structural integrity of a home. DuraTech Texas would like to share these common problems as knowing how to effectively address them is crucial for maintaining the stability and safety of your property.

Common Issues with Block & Base Foundations

Moisture Intrusion: One of the biggest challenges with block and base foundations is moisture. Water can accumulate under the house, leading to dampness, mold growth, and wood rot. Ensure proper drainage around the foundation perimeter. This may involve installing French drains, re-grading the soil to slope away from the foundation, or extending downspouts to direct water further from the base.
Wood Rot and Pest Infestation: The wooden components of block and base foundations are susceptible to rot and pest infestations, particularly from termites and carpenter ants. Regularly inspect wood elements for signs of damage or decay. Treat the wood with preservatives and consider using pest-resistant materials like treated lumber or metal shims. Engage a professional pest control service to treat and prevent infestations.
Settling and Shifting: Over time, the soil beneath the blocks can settle or shift, especially if it wasn’t compacted properly during installation. This can lead to uneven floors inside the home and misaligned doors and windows. The use of underpinning techniques such as helical piers or concrete piers to stabilize the foundation. Regularly check and adjust the shims that support the beams to ensure even weight distribution.
Insufficient Ventilation: Without proper ventilation, the crawl space under block and base foundations can become a breeding ground for moisture and pests. Ensure that crawl space vents are clear of obstructions and consider adding more vents if current ventilation is insufficient. Using fans or dehumidifiers can also help regulate moisture levels.
Cracks in Masonry Blocks: Cracks can develop in the masonry blocks due to hydrostatic pressure, thermal expansion, or the natural settling of the structure. Fill minor cracks with a suitable masonry crack filler. For larger cracks, a structural assessment by a professional may be necessary to determine if more extensive repairs are needed.

Preventative Measures

Routine Inspections: Regular inspections are essential for early detection of potential issues. Check for signs of moisture, pest activity, cracks, or structural changes.
Maintenance of Wooden Components: Treat wood regularly with protective sealants and check for early signs of rot or pest damage.
Improved Landscaping: Manage landscaping to prevent water accumulation near the foundation. Ensure that plants and trees with extensive root systems are not positioned too close to the foundation.
Proper Soil Management: Maintain the soil around the foundation properly hydrated to prevent excessive expansion or contraction. During dry periods, consider soaker hoses to maintain moisture levels.

Foundation Inspection & Repair Services in Crosby, Cypress, Friendswood & Greater Houston, Texas

While block and base foundations can present several maintenance challenges, understanding these issues and addressing them proactively can help extend the life of your foundation and prevent serious structural damage. Regular maintenance, combined with timely repairs, will keep your home stable and safe for years to come. For help inspecting and repairing your block and base foundation, contact DuraTech Texas today.