Duradek VS Liquid (or Fluid) Applied Deck Coating Systems: The Difference is in the Details

Whether you’re planning to build a new deck or refresh an existing one, choosing the right waterproofing solution is key to protecting your investment. This is especially important if your deck is over a living space or if you want a dry, usable area underneath for storage or relaxation. Two popular options for fully waterproofing a deck are liquid coatings or durable PVC membranes, such as Duradek.

Duradek has been trusted by homeowners for 50 years, providing a vinyl membrane that offers long-lasting protection and peace of mind. While liquid coatings may seem like an alternative, understanding their limitations compared to the proven benefits of a vinyl membrane like Duradek can help you make the best choice for your home.

Liquid Coatings: A Lengthy Installation in Ideal Conditions

While liquid coatings can offer a seamless, attractive finish for your deck, the installation process can be lengthy and challenging. Each layer of the coating must be applied carefully, with multiple coats needed and varying drying times. This makes the coating highly susceptible to contaminants like dust, dirt, and debris getting trapped in the drying surface.

Liquid coatings also require ideal weather conditions for application, with colder temperatures significantly extending the drying time. Because of this, the need for multiple layers raises the potential for human error and makes the process more vulnerable to weather-related delays.

The cost of labor is another important factor for homeowners. Since liquid coatings require multiple coats and precise application, a professional installer needs to be on-site for several days, increasing both time and expense. 

While the seamless look of liquid coatings can be appealing, the process involves significant limitations. The application window for these coatings can be very short—about 10 to 15 minutes (even less in hot weather)—which can lead to uneven coverage, particularly on vertical surfaces like post bases or the inside edges. This can compromise the waterproofing of your deck.

Liquid coatings also require manual mixing in small batches, typically covering only 30 to 60 square feet at a time, which adds complexity and extends the time needed for application. Additionally, the first layer takes 4 to 6 hours to form a “skin,” during which time it remains vulnerable to dirt, insects, and debris.

Temperature plays a crucial role in the installation of liquid coatings; Most require a minimum temperature of 5°C (41°F) to 7°C (45°F) to properly cure, meaning they cannot be applied year-round in most climates. Depending on your local weather, the base coat alone can take 24 hours to cure in warm weather and up to 48 hours in cooler conditions. Additional coats, such as chip and clear coats, may require an extra 2 days of drying time.

Duradek: Ready-to-Install and Consistent Every Time

For a more durable, long-lasting solution, Duradek arrives in a ready-to-install roll, handled by a professionally trained installer. Available in a wide range of styles and colors, Duradek can be installed in most cases within a single day, and you can start enjoying your deck immediately—no waiting for it to cure.

Because Duradek is securely adhered to both the deck surface and the exterior wall, it provides a completely waterproof barrier. This is especially important if your deck is over a living area, protecting your home from leaks and water damage.

With over 50 years of experience, Duradek has refined its installation methods to ensure dependable, long-lasting results. Each installation is carefully done to deliver a consistent and reliable waterproof membrane, so you can have peace of mind knowing your deck is fully protected from the elements. 

Duradek’s Long-Lasting Protection

When it comes to warranties, Duradek has you covered.  While many liquid-applied coatings typically come with a 10-year limited warranty on materials and only a 5-year warranty on labor, Duradek’s 50-year proven track record allows them to offer much more. With Duradek, you get a 15-year warranty on materials and a 10-year warranty on both materials and workmanship—twice as long as most liquid coatings.

Additionally, Duradek’s strict quality control means that a miniscule fraction of installations result in any warranty claims, making it a dependable choice for your deck. While some liquid coatings may claim “unlimited longevity” in their maintenance guides, their warranties often cover only the first 10 years or less for materials and 5 years for workmanship. Duradek’s extended warranty offers homeowners the assurance of a time-tested, reliable waterproofing solution.

UV and Weather Resistance

With regular top coat re-application, liquid coatings can have good UV protection, which helps prevent fading from prolonged sun exposure. 

Developed in Canada’s Okanagan Valley, where temperatures range from frigid winter lows of -30°C (-22°F) to scorching summer highs of 40°C (104°F), Duradek’s PVC membranes are built to withstand harsh climates. With UV inhibitors tested to endure both intense summer and winter sunlight, and wind resistance proven in conditions over 150mph, Duradek is a robust choice for any weather, including hurricane-prone areas.

Which Solution is Right for You?

If you have the time and budget to invest in a liquid system, it can deliver a smooth, seamless finish. However, for a solution that ensures long-lasting, 100% waterproof protection, Duradek is the way to go. Particularly if your deck is situated above a living area, Duradek stands out as one of the few options that guarantee complete waterproofing, giving you peace of mind and lasting protection for your home.

Learn more about the advantage of Duradek over Liquid-Applied coatings through our Roof Deck Ready White Paper, or Duradek vs. Liquids piece.