Solving Severe Basement & Crawlspace Moisture Issues in San Mateo, CA

Friday, April 4th, 2025 by Mike Gray

Challenge

Location: San Mateo, CA

Service Category: Basement Waterproofing & Crawlspace Encapsulation

Solution: CleanSpace® Encapsulation System, WaterGuard® Interior Drain System, TripleSafe™ Sump Pump, Exterior Discharge Lines

Customer Concern: Standing water and excess moisture in the basement and crawlspace

Project Duration: 3 days

The Problem: Chronic Moisture and Standing Water Beneath the Home

A homeowner in San Mateo, CA, reached out to Foundation Repair of CA after noticing excessive moisture and standing water in their basement and crawlspace. Not only did this moisture pose a serious risk to the structural integrity of the home, but it also raised health concerns, including potential mold growth and poor indoor air quality.

The problem had worsened over time—seasonal rains only amplified the issue, and the homeowner began to notice a persistent musty odor inside their home. Water was pooling under the foundation, and the crawlspace was damp to the touch nearly year-round. With worries of wood rot and structural damage looming, they knew it was time for a professional evaluation.

Solution

The Inspection: Free Evaluation & Same-Day Estimate

The homeowner contacted Foundation Repair of CA, and we responded quickly with a free, no-obligation evaluation. One of our experienced Structural Consultants conducted a thorough inspection of the basement and crawlspace.

During the assessment, we identified:

Excess groundwater infiltration
Poor drainage and water retention under the home
No vapor barrier to prevent moisture from seeping into the home
Signs of potential wood deterioration due to humidity

We presented the homeowner with a detailed, same-day proposal, including photos, system diagrams, and a full breakdown of our recommended solution to protect their home permanently.

Our Moisture Control Solution: Engineered for Long-Term Protection

To fully mitigate the moisture issues and prevent water damage in the future, Foundation Repair of CA installed a comprehensive basement and crawlspace moisture control system including:

✅ CleanSpace® Encapsulation System

We lined the entire crawlspace with our durable, 20-mil CleanSpace® vapor barrier. This heavy-duty liner prevents ground moisture and humidity from entering the space while creating a clean, dry, and energy-efficient environment under the home.

✅ WaterGuard® Interior Drainage System

Installed along the perimeter of the basement, our patented WaterGuard® drainage system captures water at the foundation’s edge and directs it away before it can seep into the living space. This interior drainage system is discreet, clog-resistant, and highly effective.

✅ TripleSafe™ Sump Pump System

At the heart of the waterproofing system is our TripleSafe™ sump pump, designed with three levels of protection:

Primary pump for everyday water removal
Secondary pump for high-volume emergencies
Battery-powered backup pump for outages

This system ensures peace of mind—even during heavy storms or power failures.

✅ Exterior Discharge Lines

To ensure water exits the property safely, we installed new discharge lines that direct water far from the home's foundation, helping to preserve soil integrity and prevent re-saturation.

The Result: A Dry, Healthy, and Protected Home

After installation, the crawlspace and basement were completely dry—even during the next round of Bay Area rain. The standing water was eliminated, the musty odor disappeared, and the homeowner could breathe easier knowing their home was protected from moisture damage and mold.

Key Benefits:

Elimination of standing water
Prevention of mold, mildew, and wood rot
Improved indoor air quality
Protection of foundation from water damage
Increased home value and energy efficiency

Why San Mateo Homeowners Trust Foundation Repair of CA

At Foundation Repair of CA, we specialize in customized moisture control solutions that address the unique challenges of Bay Area homes. Whether it’s a basement, crawlspace, or full foundation system, our team delivers long-lasting results with professional care—every time.

Our free evaluations, same-day estimates, and warrantied solutions make it easy for homeowners to take the first step toward a healthier, safer home.

Get Your Free Basement or Crawlspace Evaluation in San Mateo

If you're experiencing moisture, standing water, or musty smells under your home, don’t wait for the problem to get worse. Contact Foundation Repair of CA today for your free inspection and estimate.

📞 Call now or 📅 Book online to get started.