Waterproof Deck Contractor in Vancouver, WA & Portland, OR
Reinforced, properly sloped waterproof deck systems built to protect your structure and keep the surface safe, durable, and slip-resistant.
Licensed, Bonded & Insured
WA: MDCUSCC773DO · OR: CCB #247321
Long-Term Protection for Balconies & Elevated Decks
We professionally install reinforced waterproof deck coating systems, including the Westcoat ALX waterproof system.
Our waterproof systems are properly sloped, fully reinforced, and installed for long-term protection against water intrusion and structural damage.
WA: MDCUSCC773DO · OR: CCB #247321
Protect second-story decks, balconies, and decks over living space with reinforced waterproof coating systems like Westcoat ALX & Trex.
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A reinforced waterproof coating designed for elevated decks, providing long-term protection against moisture and structural damage.
We install high-quality under-deck waterproofing systems like Trex RainEscape that safely channel rainwater away, keeping the space beneath your deck dry and creating a clean, usable outdoor area you can enjoy year-round.
A durable metal under-deck waterproof ceiling system designed to channel rainwater away while creating a clean, dry, and protected outdoor space beneath your deck.
Waterproof systems protect the structure below by sealing the deck surface and preventing leaks into ceilings and interiors.
Ideal for second-story balconies that require durable waterproof protection and slip-resistant finishes.
Deck surfaces are carefully sloped to ensure proper water drainage and prevent pooling.
Textured coatings improve traction while maintaining a clean and modern appearance.
Choose from multiple colors and finishes to match the style of your home.
Quick answers about materials, maintenance, and the build process.
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What is a waterproof deck system (Westcoat ALX), and when do I need it?
A waterproof deck system is a reinforced coating system that seals the surface and protects the structure from water intrusion. It’s ideal for second-story decks, balconies, and decks over living space where leaks can damage interiors.
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Can you install waterproofing on a deck above a finished room (or garage)?
Yes—this is one of the most common reasons people choose a waterproof system. We install it to help prevent leaks, moisture intrusion, and structural damage over time.
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Does the deck need a slope for drainage?
Yes—proper drainage is critical. Waterproof deck systems should be properly sloped so water flows away instead of pooling, which helps the system last longer.
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How long does installation take, and when can I walk on it?
Timeline depends on deck size and prep work. Most installs take a few days, because the system is built in layers and needs proper curing time. We’ll give a clear schedule before starting.
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What maintenance does a waterproof deck system need?
Basic upkeep is simple: keep it clean, avoid sharp impacts, and don’t let water/debris sit for long periods. With proper installation and normal care, it’s built for long-term protection.
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How much does a waterproof deck system cost?
Cost depends on the deck size, condition, prep work, and finish options (texture, color, edges, drains). The fastest way to get an accurate number is a quick on-site look—after that we can give a clear estimate with scope and timeline.
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Do you offer a warranty on waterproof deck systems?
Yes—our work is installed to manufacturer guidelines and built for long-term protection. Warranty details depend on the exact system and scope (new build vs existing deck), and we’ll explain what’s covered during the estimate.
Licensed & insured • Quality materials • Clear timeline
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