Waterproofing Decks: Polyurethane coatings & TPO membrane systems that keep water out for good

A deck doesn’t fail because of the wood on top, it fails because of what happens underneath. In the Pacific Northwest, standing water and trapped moisture are the real enemy, and a good waterproofing system is what stands between your deck and a rebuild. We install fluid applied polyurethane coatings and TPO membrane systems built to shed water completely, turning your deck surface into a durable, watertight barrier rather than a wood surface that’s just hoping to dry out between rainstorms.

Waterproofing Decks

More About Waterproofing Decks

A properly waterproofed deck doesn’t just look better, it stops water at the surface instead of letting it work its way down into the joists and framing below. That means fewer repairs, no soft spots, and in many cases a fully usable dry space underneath if the deck is elevated.

  • Polyurethane Deck Coating: A seamless, fluid applied membrane that bonds directly to the deck surface. It flexes with the wood through temperature swings and settling, resists UV wear, and gives you a slip resistant, walkable finish that seals out water completely.

  • TPO Membrane Decks: A single ply thermoplastic membrane, heat welded at the seams for a fully waterproof surface. TPO holds up well against ponding water, foot traffic, and years of sun exposure, and it’s a great fit for low slope or flat deck areas where drainage is limited.

  • Substrate Prep & Repair: Before any coating or membrane goes down, we inspect and repair the substrate underneath. Waterproofing over damaged wood just traps the problem, so we make sure what’s underneath is solid first.

  • Drainage Integration: We tie the waterproofing system into proper slope and drainage so water actually moves off the deck instead of sitting on it.

  • Seam & Penetration Detailing: Railing posts, drains, and transitions are the most common failure points on any waterproofed deck. We detail every seam and penetration by hand to make sure there’s no path for water to sneak in.

  • Dry Space Underneath: For second story or elevated decks, a properly installed membrane system means the space below stays fully dry, giving you usable covered patio space underneath.

Why choose us?

We show up, we do the dirty work, and we fix your home—it’s as simple as that.

Our goal is to ensure you never have to call us for the same spot twice. We build to outlast the next decade of Washington winters, saving you thousands in future reconstruction.

Why choose us?

We show up, we do the dirty work, and we fix your home—it’s as simple as that.

Our goal is to ensure you never have to call us for the same spot twice. We build to outlast the next decade of Washington winters, saving you thousands in future reconstruction.

The Benefits

  • Reliable, Daily Professionalism

  • Fair & Competitive Pricing

  • Specialized Rot Expertise

  • Efficient Project Timelines

  • High-Quality Durable Materials

  • Transparent Communication

Looking for More Services?

Rot Repair:

Structural repairs caused by water, rot, and age

Don’t let structural rot compromise your home’s safety. We specialize in rot repair, focusing on the deep decay that threatens your building’s integrity. Our team restores the bones of your home, ensuring it remains solid against the elements.

Windows & Doors:

Prevent leaks around openings

Windows and doors are the most common leak points in a home, often serving as the primary entry points for moisture and drafts. We provide expert window replacement, sealing, flashings and leak diagnostics to keep your interior dry and your energy bills low.

Exterior Home Repairs:

Comprehensive restoration of the siding, trim, and seals

Protect your investment with professional exterior home repairs. From Hardie siding replacement to fascia and soffit fixes, we ensure your home’s “envelope” is watertight and visually stunning throughout the Puget Sound region.

Water Damage Repair:

Finding and fixing water intrusion

When water gets in, you need to act fast. Our water damage repair team specializes in leak detection and structural drying prep, ensuring your home is dry and safe after a storm.

Mold Removal & Prevention:

Find, remove, rebuild, prevent!

After the mold is professionally removed, we restore your home with care and precision. Our team specializes in complete mold removal, post-mold framing replacement, and encapsulation prep—ensuring your home is healthy, structurally sound, and protected against future mold growth for good.

Exterior Painting & Staining:

Protecting and finishing exteriors

Paint is more than just color—it’s armor. Our exterior painting and staining services provide a durable shield against moisture, protecting your siding and trim from the elements.

Inspections & Preventative Maintenance:

Proactive protection & reports

Catch problems before they become catastrophes. We offer rot and water intrusion inspections across Whatcom, Skagit, and Snohomish counties, giving you the roadmap to a healthy home.

Our Wood Rot Repair Process

  • Inspect and probe. We check beyond the visible damage, since rot in Lynnwood homes often extends further than it appears on the surface.
  • Remove and cut back. Only the compromised wood is removed, cutting back to solid, healthy material.
  • Treat and seal. Exposed wood grain is treated and sealed to keep moisture from working its way back in.
  • Rebuild to match. Damaged sections are rebuilt or replaced to match your home’s existing trim profiles and siding lines, so the repair blends in.
  • Prime and finish. We finish with a high build, flexible coating designed to hold up through Lynnwood’s wet winters and low sun conditions.

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