Stop Water Intrusion at the Source, Not the Surface
Custom-engineered systems designed for the unique hydrostatic pressures of Pennsylvania’s clay soils and historic foundations.
Improve Your Home & Health.
Water is a Structural Threat, Not Just a Nuisance
In the Delaware Valley, our soil doesn’t just get wet. It expands. The heavy clay common in Chester and Montgomery Counties acts like a hydraulic press against your foundation. This “hydrostatic pressure” forces moisture through porous masonry and microscopic structural cracks.
Standing water or seepage after heavy rain
Musty odors or visible mold growth
Efflorescence (white, powdery residue on walls)
Damp spots on stone or concrete foundations
Peeling paint or rotting baseboards
Solutions Built for Your Foundation
No two foundations in PA are identical. A 100-year-old stone farmhouse in West Chester requires a fundamentally different approach than a modern poured-concrete basement in Exton.
We design systems based on how water moves through your property.
Interior Sub-Floor Drainage
Often called French Drains, these systems manage water at the footer level, keeping floors dry even during the heaviest Pennsylvania rainstorms.
Exterior Moisture Barriers
We stop water at the source, preventing soil pressure from ever reaching your foundation walls.
Foundation Crack Injection
For poured walls, we use high-pressure seals to permanently stop localized leaks.
Structural Stone Care
Specialized waterproofing designed specifically for the porous nature of historic local stone foundations.
A Diagnostic Approach to Basement Health
Most Contractors Sell Products. We Provide Solutions.
As the President of the BHA, Sean Worthington advocates for a higher standard of care. Most companies see water and suggest a pump. We go deeper. We analyze soil behavior, grading patterns, and foundation type before we ever pick up a tool.
Many contractors install systems based on symptoms. We diagnose the cause first for more stable and permanent results.
Step 01 Inspection
We analyze how water interacts with your foundation, soil, and drainage conditions.
Step 02 Diagnosis
We determine whether pressure, cracks, or grading are driving the problem.
Step 03 Repair Plan
We design a system specific to your home, not a standard kit.
Step 04 Installation
Our certified team installs a system built for long-term performance.
BHA Leadership Drives Higher Inspection & Installation Quality
Worthington Foundation Authority operates at a different standard because we help define it. As President of the Basement Health Association, Sean Worthington contributes to the guidelines that many contractors attempt to follow.
That leadership translates directly into your project.
Our triple certification ensures each system is installed with precision, and our approach reflects real-world performance, not theory. For homeowners in Southeastern Pennsylvania, that means waterproofing designed specifically for clay soil expansion, stone foundations, and long-term moisture control.
65+ years of experience
Triple certified specialists
Third-generation family company
Regional expertise in Southeastern PA
Waterproofing Projects Near You
We’ve helped homeowners throughout Southeastern Pennsylvania control water intrusion and stabilize their homes. These projects reflect how we apply region-specific solutions to real conditions.
Basement Waterproofing in Exton PAProblem: Water entering the basement during heavy rainfallSolution: Installed an interior drainage system and sump pump to keep the space dry
Foundation Repair in West Chester PAProblem: Structural cracks and foundation settlement causing instabilitySolution: Installed a pier system to stabilize and reinforce the foundation
Serving
Southeastern
Pennsylvania
Homes
Based in Plymouth Meeting, PA, we serve homeowners within a 60-minute radius of Exton, including Chester, Delaware, Montgomery, and Bucks Counties, along with Northern Delaware.
- The Main Line
- Chester County
- Delaware County
- Montgomery County
- Bucks County
- New Castle County (DE)
Basement Waterproofing FAQs
Expansive clay soils and limestone shelf movement create pressure against foundations. That pressure forces water through cracks, joints, and porous materials over time.Is interior or exterior waterproofing better?
It depends on the cause. Interior systems manage water after entry, while exterior systems stop it at the source. We recommend a custom solution based on inspection findings.It depends on the cause. Interior systems manage water after entry, while exterior systems stop it at the source. We recommend a custom solution based on inspection findings.
Will waterproofing prevent mold?
Yes. Controlling moisture reduces the conditions mold needs to grow, which improves indoor air quality and protects your home environment.
Do I need waterproofing for a stone foundation?
Yes. Stone foundations are common in Southeastern Pennsylvania and allow moisture to pass through more easily. Proper waterproofing controls both water and humidity.
How much does waterproofing cost?
Costs depend on the severity of the issue and the system required. We provide clear recommendations and offer financing options to make solutions manageable.
Stop Water Before It Spreads
Water problems don’t get resolved on their own. Get a plan built for your home and backed by a transferable life-of-structure warranty.