The short answer
Why Sealing Matters
A cracked foundation can let water seep into your crawlspace, leading to dampness, mold, and wood rot. Sealing the crack helps keep water out and protects your home's structure. But the method you choose depends on the crack's width, depth, and whether it is still moving.
Water intrusion is a real concern in humid climates with heavy spring rains and hot summers. Acting quickly to address cracks can prevent more serious issues later. Even if a crack looks small, it may widen over time as soil shifts and temperatures change.
Types of Cracks and Fixes
Hairline cracks, usually less than 1/8 inch wide, often appear from normal settling. These can sometimes be sealed with a flexible polyurethane sealant or epoxy injection. The key is to clean the crack thoroughly and ensure it is dry before applying any material.
Wider cracks, especially those that are horizontal or stepped, may indicate structural movement. In those cases, sealing alone may not be enough. A foundation professional can assess whether the crack needs stabilization or if water pressure from outside is the real issue.
- Hairline cracks: use a flexible sealant
- Wider cracks: may need epoxy injection
- Active water leaks: address drainage first
- Structural cracks: consult a professional
- Always clean and dry the surface before sealing
- Monitor cracks for changes over time
When Sealing Is Not Enough
If water is pooling around your foundation, sealing the crack from inside may only be a temporary fix. You might need to improve exterior drainage, extend downspouts, or regrade the soil. Foundation waterproofing from the outside can be a more permanent solution.
For cracks that are actively moving or widening, sealing can fail. In such cases, foundation stabilization might be necessary. A professional can evaluate the soil conditions and the structural integrity of your foundation to recommend the right course of action.
DIY vs Professional Help
You can handle small, non-structural cracks with products from a hardware store. These are often simple to apply and can stop minor moisture issues. However, you must be honest with yourself about the crack's severity and your ability to do the job well.
For larger cracks, or if you notice signs of movement, contact a local water damage pro. They have the tools and experience to assess the situation properly. Attempting a complex repair without the right skills could lead to more damage and cost more in the long run.
Preventing Future Cracks
Prevention is often easier than repair. Keep gutters clean and direct water away from the foundation. Maintain consistent moisture levels in the soil around your home, especially during dry spells, to avoid shifting.
Pay attention to your foundation after heavy storms or hail. Regular inspections can catch small problems early. Sealing a small crack now can save you from dealing with a bigger issue later.
Water damage does not wait
Call (817) 799-6732 any time, day or night, and describe what happened.
Call Now (817) 799-6732Frequently asked questions
Can I seal a foundation crack myself?
You can seal small hairline cracks with a flexible sealant. Clean the crack, let it dry, and apply the product. For wider or structural cracks, it's safer to have a professional assess the situation to avoid making things worse.
What happens if I don't seal a crack?
An unsealed crack can allow water to enter your home, leading to dampness, mold, and damage to floors or walls. Over time, the crack may widen, and the cost to fix it can increase. Sealing early is often the more affordable choice.
Will sealing a crack stop all water leaks?
Sealing a crack can stop water from entering through that specific opening. However, if water is seeping through the foundation walls or floor, you may need additional measures like exterior waterproofing or improved drainage. A professional can help identify the source.