Foundation sealing is one of the most effective ways to prevent water intrusion, mold growth, and structural deterioration. Whether the foundation is built from stone, cinder block, or poured concrete, sealing cracks, gaps, and deteriorated mortar helps maintain structural integrity and avoid costly repairs. The right sealing approach creates a long-lasting barrier against moisture, keeping basements and crawl spaces dry, safe, and protected.

What is Foundation Sealing?

Foundation sealing is the process of applying protective materials to foundation walls, cracks, and openings to prevent moisture penetration. The sealing method depends on the type of foundation and the specific issues present. Some homes require a simple sealant application, while others may need tuckpointing or epoxy injections to reinforce deteriorated mortar or fill small cracks.

The Importance of Foundation Sealing

1. Prevents Structural Deterioration

Over time, exposure to moisture can break down building materials. Older stone foundations, in particular, often experience mortar deterioration, which can lead to gaps and weakening walls. If there are no major structural issues, we can reinforce these areas with tuckpointing or appropriate sealants to extend the life of the foundation.

2. Stops Water from Entering Cracks and Gaps

Foundation cracks, whether in cinder block, stone, or poured concrete, provide an entry point for water. Small cracks around windows, doors, or sill plates are especially vulnerable to moisture. By sealing these cracks with epoxy or silicone-based products, we create a durable barrier that prevents further damage.

3. Protects Against Weathering

Foundation cracks that are exposed to outdoor elements are more susceptible to weathering than those inside. External sealants help protect these areas from continuous exposure to rain, snow, and fluctuating temperatures, which can widen existing cracks over time.

4. Reduces Mold and Mildew Risk

A damp basement or crawl space is an ideal environment for mold and mildew growth. Sealing the foundation helps to keep moisture out, reducing the risk of airborne contaminants that can affect indoor air quality and create potential health issues.

Types of Foundation Sealing Methods

At Olson Foundation, we use a variety of sealing techniques based on the type of foundation and the level of deterioration present.

1. Tuckpointing for Stone and Cinder Block Walls

Many older homes have stone or cinder block foundations where the mortar between the stones or blocks has started to break down. If no structural issues exist, tuckpointing is an effective solution. This involves removing deteriorated mortar and replacing it with fresh mortar to strengthen the foundation and close gaps where water might enter.

2. Epoxy and Silicone Sealants for Cracks

For poured concrete walls, small cracks can be sealed using epoxy or silicone-based products. These materials provide a flexible yet durable seal that prevents water penetration and further cracking. We often use this method around windows, doors, and small foundation gaps that allow moisture infiltration.

3. Exterior vs. Interior Sealants

• Exterior Sealing: If cracks or gaps are on the outside of the foundation, they are more exposed to weathering. We apply waterproof sealants to these areas to protect them from the elements.
• Interior Sealing: Cracks or openings inside the basement or crawl space can also allow moisture to seep in. Interior sealing with epoxy injections or other moisture-resistant materials ensures these areas remain dry.

4. Additional Protection Measures

• Hardening Agents: We sometimes apply a silicone hardener to reinforce porous areas of the foundation, providing extra durability.
• Window and Sill Sealing: Small gaps around basement windows and door frames can be entry points for water. We use a strong silicone sealant to close these openings and prevent leaks.

Signs That Your Foundation Needs Sealing

If you notice any of the following issues, it may be time to have your foundation inspected and sealed:

• Cracks in foundation walls or floors
• Deteriorating mortar in stone or cinder block foundations
• Water seepage in the basement or crawl space
• Mold or mildew growth
• Efflorescence (white mineral deposits on walls)
• Musty odors in the basement

Why Choose Olson Foundation for Your Sealing Needs?

When it comes to foundation sealing, experience and expertise matter. Here’s why Olson Foundation is the best choice for your home:

• Customized Solutions: We assess each foundation individually to determine the most effective sealing method.
• Experienced Professionals: Our team specializes in foundation repair and waterproofing, ensuring high-quality results.
• High-Quality Materials: We use only the best epoxy, silicone, and mortar materials to ensure lasting protection.
• Complete Services: From assessment to sealing and maintenance, we provide complete foundation protection.

In Summary

Foundation sealing is essential for maintaining the integrity of your home. Whether your foundation is made of stone, cinder block, or poured concrete, addressing cracks, gaps, and deteriorating mortar can prevent moisture damage and structural issues.

At Olson Foundation, we provide expert sealing solutions tailored to your home’s needs. Contact us today to schedule an inspection and protect your home for years to come.