Waterproofing Above Grade in Ventura County, CA

Trusted Above-Grade Waterproofing

Whether you’re a building owner or facility manager looking for durable, low-maintenance waterproofing — or a homeowner wanting to enhance the value of your outdoor living space — JH3 Company’s waterproofing experts deliver above-grade waterproofing solutions for both solid and sound concrete and plywood substrates.

Turn to JH3 Company when you need an above-grade concrete or wood surface waterproofed across Ventura County, CA, and select cities in Santa Barbara County and Los Angeles County. We are a licensed and insured company in the waterproofing industry, offering top-quality services performed by highly qualified and certified waterproofing technicians.

Before vs After

We offer many types of waterproof deck coating systems, depending on your structure’s substrate.

1. Plywood, OSB, or approved substrates: Urethane, Cementitious
2. Concrete or approved substrates: Urethane, Cementitious

Both systems provide seamless, durable, and high-performance protection designed to meet required standards and withstand the elements for these structures:

For over 45 years, we’ve handled simple to complex waterproofing challenges facing architects, consultants, engineers, general contractors, HOAs, and homeowners with short and long-term goals. Contact us if you have a waterproofing-related question about an above-grade surface. One of our specialists will help you determine the extent of your problem and find a convenient and affordable solution.

Portfolio of Above Grade Waterproofing Projects

5 Step Waterproofing Process

Waterproofing an above grade surface goes beyond just applying a top coat water sealant.

70% of our waterproofing systems for structures with a plywood substrate involve 5 comprehensive and technical installation steps. Once completed, the system will extend the life of your structure from water intrusion for many years — saving you a lot of money by avoiding costly repair bills.

When waterproofing structures with concrete substrates, we usually prefer to use a urethane coating system. The number of required steps varies based on the thickness of the base needed. For example, for heavy vehicular traffic structures, like commercial driving ramps and parking garages, you may require a thicker base before applying the top coat.

Manufacturer Products

We are certified to use only the highest quality waterproofing coatings from leading national manufacturers. Their systems offer design flexibility and a wide range of customizable finishes, ensuring each project meets both functional and aesthetic goals.

We rely on these products for their proven durability and fire-rated certifications, helping safeguard the long-term integrity of every structure. Our team knows how to select the right system for each specific application.