Elizabeth Kravchuk
I’m really happy with my new deck! The team did a fantastic job. They listened to what I wanted, and it turned out just as I imagined. Great work!
Deck Waterproofing Services
Vinyl, Membrane and Under-Deck Systems
Professional deck waterproofing services for York Region, Kawartha Lakes and Muskoka: vinyl deck membranes, Trex RainEscape under-deck drainage and waterproof deck coverings that keep joists, beams and the space below dry.
Contact Us Read Our Google ReviewsWhat Homeowners Say About Our Deck Work
Three of the 33 Google reviews homeowners have left for the crew (rated 5.0 overall). Read all of our Google reviews.
юра козик
The XP Decking company was really easy to work with. They kept me updated, finished on schedule, and the deck is solid and looks great. I’m so pleased.
Наталка Онисько
I had a great experience with XP Decking company. They were on time, friendly, and the deck looks amazing. I definitely recommend them if you need a new deck.
Vinyl Membranes, Trex RainEscape and Under-Deck Drainage
We install professional-grade waterproof vinyl membranes, Trex® RainEscape systems and under-deck drainage designed for Ontario’s climate. With more than 15 years of experience, XP Decking delivers deck waterproofing that seals out moisture, protects joists and beams, and prevents long-term structural damage, which a quick DIY job or surface sealant can’t do.
Our Deck Waterproofing Services
We offer complete deck waterproofing services, including expert installation of waterproof vinyl decking, drainage systems, and premium moisture barrier solutions built to last in Ontario’s demanding climate.
Waterproof Vinyl Decking Installation
We install high-quality deck systems like DURADEK® waterproof vinyl decking, which creates a slip-resistant, waterproof surface. These membranes seal out moisture, stop leaks, and hold up against rain, snow, and heavy foot traffic, with zero need for staining or sealing.
Under Deck Waterproofing Systems
We install custom under-deck waterproofing systems that keep everything below dry, from patio furniture to storage. By adding water diverters, gutter channels, and sealing tape between joists, we help you turn that forgotten space into something useful.
Trex® RainEscape Waterproofing System
The Trex® RainEscape waterproofing system is built for elevated decks. It redirects water through hidden troughs away from your structure, keeping the underside bone dry. We’re certified to install it properly, and you can add ceiling panels, lighting, or even a covered seating area underneath.
Waterproof Deck Membranes
Our waterproof deck membranes do more than cover the surface. They act as a protective barrier over your framing, sealing out rain, snow, and the freeze-thaw damage that eats away at decks. Ideal for wood or composite, these membranes are heat-welded or bonded for lasting performance.
Underneath Deck Waterproofing for Raised Decks
Underneath deck waterproofing for raised decks shields your framing from the elements, and moisture finds every crack. Our method protects the structure from rot, mould, and mildew. We install moisture barriers and redirect runoff, helping preserve your framing and create a clean, dry space you can actually use.
Waterproofing Options: What’s Right for Your Deck
Every deck is different. We offer proven waterproofing systems matched to your structure, materials and budget, all built for Ontario weather.
Vinyl Decking Systems
Vinyl decking systems like DURADEK® provide a walkable, waterproof surface that seals out moisture while enhancing the look of your deck. Installed as a single sheet membrane, it bonds to the substrate and protects joists, fasteners, and seams from water intrusion. Ideal for balconies and flat-surfaced decks.
Under Deck Drainage Systems
Our under-deck drainage systems catch water before it reaches your framing and carry it away through hidden troughs and downspouts. The area beneath the deck stays dry, which makes it useful for walkouts, patios or storage. Each system is custom-fit and sealed to prevent leaks and sagging.
Waterproof Membranes for Wood Decks
We install waterproof membranes over or beneath your deck boards to stop rot, mould, and decay from setting in. These moisture barriers are designed for wood-framed structures and create a shield against freeze-thaw cycles, pooling, and snow buildup.
Trex Waterproofing Systems
We install Trex waterproofing systems, including the RainEscape® system, for second-storey and elevated decks. This solution hides between joists, capturing water and sending it away from the structure. It’s ideal for creating a dry, finished space below your deck and works with composite, vinyl, or wood builds.
Waterproofing for Ground & Covered Decks
We protect low-clearance decks using waterproofing tools like joist tape, sealed fasteners, and moisture barriers. Whether it’s a Ground Deck with close soil contact, a Layout Deck with complex framing, or Covered Deck that sees sideways rain, these solutions help block moisture and prevent rot.
Signs Your Deck Needs Waterproofing
If your deck shows signs of moisture damage, don’t wait. Spotting issues early can save you thousands in repairs. Here’s what to watch for.
Visible Water Pooling or Dripping Below Deck
If you notice standing water or dripping between deck boards, your deck likely lacks proper drainage. Our deck waterproofing services stop water intrusion and protect structural components by redirecting runoff with under-deck systems and membrane seals.
Peeling or Cracked Surface Coating
When surface coatings start to crack or peel, moisture is getting into the deck. We replace failing finishes with waterproof vinyl decking or membrane systems that bond directly to the surface and don’t flake.
Moisture Stains or Rot on Framing Joists
Dark stains or soft spots on joists, beams, or posts point to water damage. Our waterproof deck membranes form a continuous barrier that blocks moisture from reaching your wood framing, extending the life of your entire structure.
Musty Smells or Mould Growth
Persistent damp odours or visible mould under your deck mean water is being trapped. We install under deck waterproofing systems that create airflow and drainage, stopping mildew and decay before they spread.
Exposed Wood With No Sealant Layer
Bare deck boards and joists are vulnerable to water damage. Our team installs vinyl decking and Trex® waterproofing systems to seal and protect the structure, especially through Ontario winters.
Why Deck Waterproofing Is Essential in Ontario?
Ontario’s freeze-thaw cycles, snow, and heavy rainfall can seriously damage decks. Proper waterproofing keeps your outdoor space safe and sound year-round.
Without proper protection, moisture seeps through gaps and soaks into framing. Our deck waterproofing systems are a barrier against water infiltration, sealing seams, fasteners, and decking to keep structural damage from ever starting.
Trapped moisture leads to rot, mould, and insect infestation. We use waterproof deck membranes and under-deck waterproofing systems to eliminate standing water and humidity, stopping problems before they spread into your home.
Unprotected wood weathers fast in Ontario’s climate. Vinyl decking and Trex® RainEscape keep water off the boards, joists and beams.
Turn unused space into a functional area. Under-deck waterproofing creates a dry, sheltered space below a raised deck for storage, seating or a barbecue area, much like adding an outdoor room.
Water damage leads to expensive repairs. Quality deck waterproofing helps you avoid early board replacement, rot repair and structural fixes, and saves money over the life of your deck.
With a properly sealed and drained deck, you’ll worry less about rain, snow, or melting ice. Our systems provide durable protection built for Ontario weather, so you can enjoy your space in every season.
Decking Specialists Built by Our Own Crew, to Code, Across York Region.
Get a QuoteWhy Choose XP Decking for Deck Waterproofing
Waterproofing protects your investment. With years of experience, certified systems and a dependable local crew, XP Decking does the job properly the first time.
15+ Years of Experience With Deck Waterproofing
We’ve been waterproofing decks in Ontario for more than 15 years. From vinyl membranes to under-deck waterproofing systems, we know what works in Ontario’s climate and what doesn’t.
Certified Installers for Trex® RainEscape & Duradek®
We’re certified by Trex® RainEscape and Duradek®, so your installation is backed by manufacturer warranties and done to their specifications.
Fully Insured, WSIB-Covered Team
You’re protected throughout. Our crew is fully insured and WSIB-covered on every waterproofing job, from preparation to the final walkthrough.
Built to Code and to the Weather Here
We build to the Ontario Building Code, each town’s own rules, and the weather here. Snow, ice, heavy rain? We’ve handled it all. Our waterproofing is designed for Ontario, not guesswork.
We Handle Permits & Inspections
Forget the paperwork. We handle all required permits and inspections so your deck upgrade is fully compliant.
Transparent Quotes, No Surprise Fees
You’ll get a detailed, transparent quote before we start, with no upselling or hidden charges.
Works With Existing or New Decks
Whether you’re protecting an older deck or starting fresh, our systems install cleanly on existing or new decks, usually without a full teardown.
Schedule a FREE site visit, including precise measurements and a detailed quote, for your new deck solutions.
Contact UsOur Waterproofing Process
Free Site Visit & Assessment
We start with a free on-site visit to inspect your deck’s condition, framing, and slope. Then we recommend the right waterproofing system based on your needs and structure.
Surface Prep & Waterproofing
We prepare all surfaces, repair problem areas and install your chosen system, whether it’s vinyl decking, a waterproof membrane or a Trex® RainEscape under-deck system.
Final Inspection & Walkthrough
We don’t leave until it’s perfect. After installation, we test all seals and drainage points, then walk you through your new deck waterproofing system step by step.
Deck Waterproofing Across Our Service Area
We work with homeowners in ten communities across York Region, Simcoe County, Kawartha Lakes and Muskoka. Find your town, neighbourhood and postal code below, then open your town’s page for the permit rules that apply there.
Newmarket
York Region
- L3XNewmarket Southwest
- L3YNewmarket Northeast
- L9NHolland Landing
- L0G 1V0Sharon
NeighbourhoodsGlenway · Armitage · Stonehaven · Bogarttown · Summerhill · Woodland Hill · Downtown Newmarket
Aurora
York Region
- L4GAurora
NeighbourhoodsAurora Highlands · Hills of St. Andrew · Bayview Wellington · Downtown Aurora
Richmond Hill
York Region
- L4BRichmond Hill Southeast
- L4CRichmond Hill Southwest
- L4EOak Ridges / Lake Wilcox
- L4SRichmond Hill Central
NeighbourhoodsOak Ridges · Lake Wilcox · Langstaff · Bayview Hill · Jefferson · Mill Pond
Vaughan
York Region
- L4LWoodbridge South
- L4HWoodbridge / Kleinburg
- L6AMaple
- L4KConcord
- L4JThornhill West
NeighbourhoodsWoodbridge · Kleinburg · Maple · Concord · Thornhill · Vellore · Patterson
King City
York Region
- L7BKing City
- L0G 1T0Schomberg
NeighbourhoodsKing City · Schomberg · King Township
Nobleton
York Region
- L0G 1N0Nobleton
NeighbourhoodsNobleton Village · Rural King Township
Keswick
York Region (Georgina)
- L4PKeswick
- L0E 1R0Sutton West
- L0E 1N0Pefferlaw
NeighbourhoodsKeswick · Sutton · Jackson's Point · Pefferlaw
Bradford
Simcoe County
- L3ZBradford
NeighbourhoodsBradford · Bond Head · Green Valley · Holland Marsh
Kawartha Lakes
City of Kawartha Lakes
- K9VLindsay
- K0M 1A0Bobcaygeon
- K0M 1N0Fenelon Falls
- K0L 2W0Omemee
- K0M 1K0Coboconk
- K0M 2A0Kinmount
NeighbourhoodsLindsay · Bobcaygeon · Fenelon Falls · Omemee · Sturgeon Lake · Pigeon Lake · Balsam Lake
Muskoka
District of Muskoka
- P1HHuntsville
- P1LBracebridge
- P1PGravenhurst
- P0B 1J0Port Carling
- P0C 1A0Bala
- P0B 1A0Baysville
NeighbourhoodsHuntsville · Bracebridge · Gravenhurst · Muskoka Lakes · Lake of Bays · Georgian Bay · Lake Rosseau
Explore Our Recent Deck Builds
XP Decking
Custom Deck Building Solutions
Business Hour
Monday to Friday: 9 am to 5 pm
Saturday: 9 am to 1 pm
Sunday: Closed
Frequently Asked Questions
A professionally installed deck waterproofing system can last 15–20 years or more with proper care. Systems like vinyl decking and Trex® RainEscape are designed for long-term durability and often come with strong warranties.
Yes, we can waterproof most existing decks. After a site inspection, we’ll recommend the right system, like waterproof membranes or under deck drainage, that can be installed without needing a full rebuild.
For composite decks, we recommend the Trex® RainEscape system. It installs beneath the surface, protecting joists and beams without altering your deck’s appearance. It needs no maintenance beyond cleaning.
The most effective method is a custom under-deck waterproofing system with drainage troughs and downspouts. These systems catch and move water away before it ever touches your framing.
Sealing or staining gives basic surface protection. For real moisture control in Ontario’s weather, waterproofing with membranes or drainage systems is a far better long-term solution.
Yes, stopping moisture from getting into your deck framing helps prevent rot, mildew, and even pest issues. Our systems are built to block moisture at every level.
Most deck waterproofing installations take between 1–3 days. The exact timeline depends on your deck’s size, structure, and the type of system being installed.
Yes. We are certified by both Trex RainEscape and Duradek, so installations are done to the manufacturer’s specification and carry their warranty.
Yes. Under-deck systems catch water below the boards and carry it to a gutter, which keeps a walkout, patio or storage area beneath a raised deck dry. We fit them to new and existing decks.