Waterproofing Services
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Over 30 Years of Proper Water Management Details & Systems
Protect Your Home from Water Damage—Inside and Out
Water is one of the most destructive forces your home can face. At JA Exterior Finishes, we specialize in comprehensive waterproofing solutions that safeguard your foundation, basement, roof, and exterior against leaks, flooding, and long-term moisture damage. With over 30 years of experience in proper water management details & systems, we deliver proven results that keep your home dry and secure—season after season.
Our Waterproofing Services
- Exterior Foundation Waterproofing Seal and protect foundation walls to stop water before it enters your home.
- Interior Drainage Systems French drains, sump pumps, and dry wells to manage water inside basements and crawl spaces.
- Roof Waterproofing & Coatings TPO, EPDM, and protective roof coatings designed to keep moisture out.
- Basement Waterproofing Stop leaks, seepage, and flooding with proven basement water management systems.
- Water Diversion & Grading Solutions Custom landscaping and drainage designed to move water safely away from your home.
- Moisture & Mold Prevention Solutions that prevent dampness and protect indoor air quality.
Why Choose JA Exterior Finishes for Waterproofing
- Decades of Expertise With more than 30 years of experience, our team knows how to diagnose and resolve water intrusion issues at their source—not just cover them up.
- Full-Service Waterproofing From exterior foundation sealing to drainage systems, sump pump installations, and roof waterproofing, we provide a complete range of solutions.
- Built for Long Island Homes Our waterproofing systems are designed to handle coastal rains, snowmelt, and high groundwater levels common throughout Nassau & Suffolk Counties.
- Protect Your Investment Water damage can weaken your foundation, cause mold growth, and lower property value. Our solutions ensure long-term protection and peace of mind.
Get a free quote
All Services
Speak With A Knowledgable Expert
Call us anytime to discuss your project and gain expert advice.
We can help
What Sets Us Apart
We proudly serving Nassau and Suffolk Counties—including Huntington, Smithtown, Patchogue, and beyond for over 30 years.
- 30+ Years of Expertise – Decades of proven success designing and installing proper water management systems that protect Long Island homes.
- Comprehensive Solutions – From foundation waterproofing to drainage systems, sump pumps, and coatings, we handle every aspect of moisture control.
- Code-Compliant Installations – All systems are built to meet or exceed local and state building codes for long-term reliability.
- Protection From the Ground Up – We don’t just stop water—we design solutions that safeguard your foundation, basement, and entire structure.
- Local Knowledge – As a Long Island–based company, we understand the region’s soil, weather patterns, and seasonal challenges, delivering waterproofing systems built to last.