At Waterproof Caulking, we specialize in expert below-grade waterproofing solutions designed to shield your structure’s foundation against long-term water intrusion, hydrostatic pressure, and soil moisture. Whether you’re building a new or restoring an existing property, investing in the right waterproofing system below grade is critical for ensuring structural integrity, indoor air quality, and long-lasting performance.
As a trusted caulking and waterproofing contractor in the Northeast, we understand the variable conditions of our regional climate: heavy rains, freeze-thaw cycles, and seasonal groundwater fluctuations. Our local expertise allows us to deliver solutions that are both durable and tailored to the environment in which your home or business exists.
What Is Below-Grade Waterproofing?
Below-grade waterproofing refers to the methods and materials used to prevent water from penetrating foundational walls or floors that are located beneath ground level. This can include foundations, basements, crawl spaces, underground parking structures, elevator pits, tunnels, and more.
Unlike damp proofing, which only resists moisture, below-grade waterproofing systems are engineered to actively block both moisture and liquid water, even under hydrostatic pressure. This protection is essential when foundations are exposed to groundwater or when water tends to pool around the building perimeter.
Our Proven Waterproofing Process
We follow a multi-layered approach to below-grade waterproofing for defense that’s comprehensive and built to last. Here’s what you can expect from our expert team when requesting service:
Site Assessment & Planning
Our team begins each project with a thorough site inspection, evaluating soil conditions, the water table, drainage, and structural considerations. We’ll assess the needs of your property and create a detailed waterproofing plan tailored to protect against future water exposure.
Surface Preparation
Long-term success begins with proper surface prep. We remove debris, smooth walls, prime materials, and repair cracks or voids to ensure full membrane adhesion. Clean, conditioned surfaces create more effective and reliable waterproof barriers.
Material Selection
We work with premium, industry-proven materials, including:
- Fluid-applied rubberized asphalt membranes
- High-performance sheet membranes (HDPE or self-adhesive)
- Bentonite clay systems
- Drainage and protection boards
- Integral crystalline admixtures (for new concrete pours)
Every job is different. We select your waterproofing system based on your project scale, structure type, and local site conditions.
Professional Installation and Quality Assurance
Precision is everything. Our installers apply waterproofing layers expertly and verify overlap, seal continuity, transitions, and penetration points (such as pipes or structural ties). We also install drainage boards or membranes where necessary to redirect ground moisture away from your foundation.
After installation, we perform thorough inspections to ensure your system is sealed, bonded, and performing to spec. We’re committed to our customers for the long-term and will advise on maintenance and signs to monitor as the seasons change.
Why Choose Waterproof Caulking?
Local Northeast Knowledge
We’ve waterproofed thousands of square feet of below-grade space across Pennsylvania, New Jersey, Delaware, and the surrounding region. Our team delivers localized solutions that stand up to the real-world demands of our climate and terrain.
Waterproofing Expertise
With extensive experience across commercial, residential, and institutional buildings, our team knows what it takes to prevent foundation leaks before they happen.
Building Code Compliant
All of our systems meet or exceed current building code requirements for below-grade waterproofing in commercial and residential structures. No matter the project, we ensure you maintain code compliance.
Long-Term Value
By investing in a quality waterproofing system now, you can avoid costly repairs, mold problems, and structural compromise down the road.
Ideal Applications
Our below-grade waterproofing services are ideal for:
- Basements and underground living spaces
- Below-grade parking garages
- Elevator shafts and mechanical rooms
- Retaining walls and foundation footings
- Tunnels and utility corridors
- Crawl spaces and storm shelters
Other Waterproofing Services We Offer
- General Waterproofing
- Damp-Proofing
- Sheet & Fluid-Applied
Don’t leave your foundation’s protection to chance. Contact Waterproof Caulking today for a free consultation and let our expert team of specialists walk you through the best waterproofing strategy for your below-grade spaces. Start safeguarding your home or business today.