Deck Flex W.M. Walking Deck & Roof Covering System
Class A Fire Rated waterproofing system for plywood and concrete decks. ICC-ES listed for building code compliance.
View DetailsProfessional Deck Waterproofing Systems and Specialty Coatings
ICC-ES listed walking deck & roof covering waterproofing systems and specialty coating products manufactured here in the USA for over 30 years.
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For Architects & Engineers
CSI 3-part specifications for the ICC-ES listed (ESR-3672) Deck Flex WM and Deck Flex WF deck waterproofing systems for both plywood and concrete surfaces.
Get to know our professional deck waterproofing systems and specialty coating products. Whether you are looking to waterproof a plywood deck over a living area or resurface your commercial roof with an energy-saving elastomeric roof coating, we're here to help. If your project needs more protection, our fire-rated ICC-ES listed plywood deck waterproofing systems featuring the TetraCrete® cementitious system will beautify and protect for years to come. Our Deck Flex walking deck & roof covering waterproofing systems meet local and international building codes on both plywood and concrete surfaces.
Deck Waterproofing Systems & Specialty Coating Products
Deck Flex W.F. Walking Deck & Roof Covering System
Class B Fire Rated waterproofing system. Perfect for residential and light commercial applications.
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Deck Flex Elastomeric Deck Paint Top Coat
A durable, flexible elastomeric coating designed for deck surfaces. Provides excellent waterproofing and UV protection.
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Elastomeric Roof Coating (T2424)
Energy-saving elastomeric roof coating. Meets Title 24 requirements for commercial roofing applications.
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All-Purpose Protective Sealer
Waterborne industrial sealer that protects various surfaces from water, chemicals, and solvents. 400 sq. ft. coverage per gallon.
View DetailsWe focus on a core set of offerings that have been tested and are trusted by contractors, property managers, homeowners, engineers and architects. These walking deck & roof covering systems and deck coatings are designed to be long-lasting, economical, easy-to-use, and environmentally-friendly. We also create self-contained deck paint kits and other products through our best deck paint or Title 24 roof coating website. We have also partnered with US Made Supply to distribute select products.
Deck & Roof Covering Systems
- Deck Flex W.M. Walking Deck & Roof Covering Waterproofing System - Class A Fire Rated for plywood walking and roof decks
- Deck Flex W.F. Walking Deck & Roof Covering Waterproofing System - Class B Fire Rated for plywood or concrete decks
Specialty Coatings
- T2424 Elastomeric Roof Coating - CRRC certified, Title 24 and Cool Roof compliant
- Deck Paint - Premium, elastomeric deck paint and coating for protecting existing decks
- All-Purpose Clear Sealer - Clear protection for wood, concrete and other surfaces
Need Guidance?
Not sure which product or system is right for your project? Email, call or text us at (888) 929-8624 anytime for help. You can also learn more about elastomeric coating application methods in our partner's guide.
Deck Waterproofing FAQs
What is deck waterproofing?
Deck waterproofing is a protective system applied to walking decks, balconies, and roof decks to prevent water from penetrating the surface and damaging the structure below. Professional deck waterproofing systems typically include multiple layers—a base coat, waterproof membrane, and protective topcoat—that work together to create a seamless barrier against moisture, UV rays, and foot traffic.
What is the best waterproof deck coating?
The best waterproof deck coating depends on your specific needs. For decks over living spaces requiring complete waterproofing and fire ratings, ICC-ES listed multi-layer systems like the Deck Flex W.M. (Class A fire-rated) or W.F. (Class B fire-rated) are the gold standard. For simple moisture protection on wood decks, an elastomeric deck coating or penetrating sealer may suffice. Always choose products with independent third-party testing and code compliance documentation.
How long does deck waterproofing last?
Professional multi-layer deck waterproofing systems typically last 15-20 years or more with proper maintenance. Basic deck coatings and sealers may need reapplication every 2-5 years depending on traffic, climate, and UV exposure. ICC-ES listed systems often come with manufacturer warranties of 10 years when applied by certified contractors.
Do I need a permit for deck waterproofing?
In many jurisdictions, yes—especially in California where SB 721 and SB 326 mandate inspections and repairs of exterior elevated elements. Permit requirements vary by location, but waterproofing work on balconies over living spaces or roof decks typically requires permits. Using an ICC-ES listed system simplifies the permit process because it provides the code compliance documentation building officials need.
What's the difference between deck coating and deck waterproofing?
Deck coating is a general term for any protective finish applied to a deck surface, including paints, stains, and sealers. Deck waterproofing specifically refers to systems designed to completely prevent water penetration—critical for decks over living spaces. A basic deck coating may provide moisture resistance, but only a true waterproofing system with a seamless membrane can prevent leaks into the structure below.
Technical Resources & Guides
Understanding ICC-ES AC39
Learn about the acceptance criteria for walking deck systems and why ICC-ES evaluation matters for code compliance.
Fire Ratings Explained
Understand Class A vs Class B fire ratings, ASTM E84 testing, and when each rating is required.
What is Elastomeric Roof Coating?
Complete guide to elastomeric coatings—benefits, types, energy savings, and application methods.
California SB 721/SB 326 Compliance
Requirements for balcony inspections and waterproofing repairs in California multi-family buildings.