SERVING THE GREATER PHILADELPHIA AND LEHIGH REGIONS
CRAWL SPACE WATERPROOFING SOLUTIONS
Protect Your Home from the Ground Up
Does your crawlspace smell musty? Is the floor above it starting to feel soft or bouncy? Have you noticed signs of water, mold, or pests? If any of this sounds familiar, it’s time to take a closer look—and Del-Val Basement Waterproofing is here to help.
Excess Moisture In Crawl Spaces Can Cause Lead To:
Mold & Mildew Growth
Musty Odors Permeating The Entire House
Wood Rot & Weakened Floors
Termites, Insects & Other Unwanted Pests
Weakened Foundation Integrity
Poor Indoor Air Quality Can Affect Resident Health
Why Your Crawl Space Matters...
Even though you rarely enter it, your crawlspace plays a major role in your home’s health. In fact, up to 30% of the air on your first floor comes directly from the crawlspace. That means any moisture, mold, or pests living down there can affect your indoor air quality—and your health.
Here are 8 common signs a homeowner may need to have their crawlspace inspected for waterproofing or moisture damage:
- Musty or Damp Odors – Persistent smells often indicate mold or excess moisture.
- Visible Mold or Mildew – Growth on walls, joists, or insulation is a red flag.
- Standing Water or Wet Soil – Any pooling water in the crawlspace signals poor drainage.
- High Indoor Humidity – Moisture from below can raise humidity levels throughout the home.
- Sagging or Warped Floors – Water damage can compromise the structural support beneath.
- Rusty Metal Fixtures – Corrosion on pipes, ducts, or fasteners often points to excess moisture.
- Increased Pest Activity – Termites, rodents, and other pests are drawn to damp crawlspaces.
- Efflorescence on Walls – White, chalky residue on foundation walls shows water intrusion.
Our Process
At Del-Val Basement Waterproofing, our solutions are based on a thorough inspection of the crawlspace which we will enter, take pictures of, and video the problem(s). Our inspector will show you the video and recommend the most effective interior and exterior waterproofing solutions tailored to your home’s unique needs. Whether it's moisture control, drainage, or full encapsulation, we’ll guide you every step of the way—so you can enjoy a safer, healthier, and more comfortable living environment.
Del-Val's Crawl Space Waterproofing Services
At Del Val, we provide expert crawl space moisture control and foundation protection services tailored to your home’s specific needs. We specialize in advanced solutions like vapor barrier installation, crawl space air sealing, vent cover replacement, sump basin systems, and high-efficiency dehumidifiers. Our team focuses on eliminating ground moisture, preventing mold growth, and improving air quality from the bottom up.
Crawlspace Dehumidification System
High-capacity, energy-efficient dehumidifiers maintain humidity levels below 50%, as recommended by building scientists. This helps prevent mold growth, wood rot, and poor air quality.
Crawlspace Encapsulation System
A durable vapor barrier is installed to seal off the dirt crawlspace, preventing moisture, odors, and harmful vapors from affecting the structure and indoor air quality.
Crock & Sump Pump Installation:
Sump pumps efficiently collect and remove water from the crawlspace, preventing flooding and long-term water damage. Ideal for areas with high groundwater or drainage issues.
Crawl Space Vent Covers:
Installed to fully seal crawlspace vents, these covers block outside air and moisture. When combined with a dehumidification system, they help create a controlled, dry environment.
Drainage Mat System:
A dimpled plastic underlayment designed to sit beneath the vapor barrier or on top of concrete. It directs water toward the sump pump for efficient removal, helping manage seepage.
Frequently Asked Questions
How do I know if my crawl space has a moisture problem?
Common signs include musty odors, visible mold or mildew, standing water, high indoor humidity, or sagging floors. A professional inspection can confirm the extent of the issue.
What does crawl space waterproofing include?
It can include vapor barrier installation, sump pump systems, drainage mats, air sealing, dehumidification, and vent covers. The exact solution depends on your home’s layout and moisture levels.
Is crawl space encapsulation the same as waterproofing?
Encapsulation is one method of waterproofing. It involves sealing the crawl space with a heavy-duty vapor barrier and adding other moisture control systems, like a dehumidifier, to fully protect the area.
How long does crawl space waterproofing last?
When professionally installed and maintained, most systems can last 20+ years. Regular inspections help ensure everything continues to perform as it should.