Tired of water dripping through your deck?
If you want to use the space under your deck for a covered patio, outdoor lounge, or even storage, standard decking materials won’t cut it. That’s where deck waterproofing comes in. It’s a smart, long-term solution that turns your upper deck into a fully protected, dry zone underneath.
A Seamless, Multi-Layer System Built to Last
At PCL, we now offer Waterproof Deck Coating throughout Bellingham and Whatcom County. It’s a tough, seamless, multi-layer system built to fully waterproof your deck surface and create a dry, usable space underneath. It’s perfect for outdoor living rooms, covered patios, or protected storage.
How It Works
Our system starts with a marine-grade plywood substrate, carefully sloped away from your home for natural drainage. From there, we apply a rubberized waterproof membrane built to withstand heavy use, followed by a topcoat embedded with fine sand for a textured, slip-resistant surface. Unlike vinyl membranes, this coating doesn’t shrink, crack, or stain when exposed to sun or heat. You can drop a hot drink or even a lit cigar without damaging the finish.
Why It Outperforms Vinyl and Acrylics
This is a full waterproofing system, not just a coating. It forms a flexible, seamless membrane that blocks rain, snow, and moisture completely, protecting both the top surface and the space below. Compared to vinyl or acrylic coatings, our rubberized system lasts 5 to 10 or more years with minimal upkeep. It holds up to foot traffic, UV rays, and the constant freeze-thaw cycles we see here in Whatcom County.
Added Safety and Comfort
The sanded top layer provides traction even when wet, making it ideal for families, pets, and anyone concerned about slippery outdoor spaces. Some coatings can also reduce surface heat by up to 35 percent, making bare feet more comfortable in summer. And with many rubber coatings being water-based and low in VOCs, they’re safer for your family and better for the environment. Learn more about VOCs and safety at Greenseal.org.
Where It Works Best
This service is especially popular for second-story decks with outdoor living areas below, pool surrounds and concrete patios, balcony surfaces on multi-level homes, exposed walkways, and even commercial entryways. If it sees water and foot traffic, it can benefit from waterproof deck coating.
A Smarter Investment for the PNW
Vinyl might look good at first, but it comes with downsides. It expands and contracts in the sun, which leads to premature failure. It also stains easily and is sensitive to heat. Our waterproof deck coating solves all of those issues while delivering a longer lifespan and better safety.
Built for Bellingham Weather
This is a smart investment for homeowners throughout Bellingham and Whatcom County, where our wet climate demands better protection. Our in-house team ensures every detail is done right, from slope and flashing to the final finish coat. We never cut corners.
Let’s Create a Dry, Usable Space Under Your Deck
If you want a dry, usable space under your deck without sacrificing looks or durability, this is the method to choose. Let’s make your outdoor living space functional in every season.
Learn more about our custom deck installation services »
FAQ
How long does deck waterproofing last?
With proper prep and occasional maintenance, the rubber membrane can last over 10 years.
Can it go over an existing deck?
Possibly. If the structure is sound, we may be able to install a new sloped plywood surface and apply the coating.
Is it slippery when wet?
No. The sanded finish adds texture and improves grip, even in rainy conditions.
How do I maintain it?
Annual inspection and a touch-up coat every few years is usually all it takes.
