Protecting your outdoor decks and furniture from rot, warping, cracking, and UV damage doesn’t have to feel like an impossible chore. With the right products and methods, you can keep your outdoor wood safe and beautiful for many years to come!
Whether you’re sprucing up a patio set or sealing your deck before summer, here is everything you need to know to get the job done right.
1. Prepare Your Wood for Waterproofing
The most common reason a waterproofing job fails is poor preparation. If the wood isn’t ready to absorb the finish, the protective layer will just peel or wash away.
Sealers need bare wood to penetrate properly, so it’s important to have your wood as clean as possible before you get started! Here’s a step-by-step guide for how to clean your wood deck or furniture.
Start by thoroughly cleaning the wood to remove leaves, dirt, mildew, and old peeling finishes using a specialized deck cleaner. For decks, a pressure washer on a low setting works well, provided you use a wide fan tip to avoid gouging the soft wood.
Next, strip away any flaking varnish or solid stain with a wood stripper and a stiff-bristle brush. Once clean and dry, lightly sand the surface with 80 to 120-grit paper to open the pores.
After that, it’s time to wait until the wood is bone dry! Wait at least 48 to 72 hours after washing or heavy rain before applying any product. Otherwise, you’ll trap moisture inside and cause internal rot.
2. Choose the Right Waterproofing Product
The type of finish you choose depends entirely on the wood type and the desired look. For example, teak is a naturally oily wood, so oil-based teak wood stain tends to be preferred over water-based stains.
For decks, penetrating sealers are excellent because they soak deep into the fibers and won’t peel under heavy foot traffic. The only downside is that they require reapplication every few years. Alternatively, semi-transparent or solid stains offer great waterproofing alongside excellent UV protection, with solid stains lasting the longest.
Just be sure to avoid surface-forming finishes like polyurethane on decks, as they will inevitably crack and peel under foot traffic and standing water.
For outdoor furniture, natural oils like tung or teak oil bring out the wood’s rich beauty and are incredibly easy to apply, though they offer little UV protection. If you want a high-gloss, protective finish for furniture, Spar Urethane is a great choice because it flexes with temperature changes.
3. Pro Tips for Application
Application is an art, and it requires proper planning and patience.
Even if your wood is dried and ready for application, don’t jump in immediately. Start by checking the weather. The ideal time to apply your finish is a dry day between 50°F and 90°F. Avoid direct, intense sunlight, which dries the product too quickly and prevents deep penetration. You’ll also want to make sure it’s not expected to rain right away, either.
If you use a sprayer or roller on a deck, follow up with a wide brush (a process called back-brushing) to work the product deep into the pores and smooth out puddles. Pay special attention to saturating the end grains of deck boards and the feet of wooden furniture, as these cut ends suck up moisture rapidly.
Most importantly, don’t over-apply. While you want a thorough layer, wood can only absorb so much sealer. Wipe off any excess after 15 to 20 minutes to prevent a sticky, dirt-attracting mess.
4. Ongoing Maintenance for Waterproofed Wood
To keep your wood looking fresh, try the water drop test to see if you need a new coat. Simply sprinkle a few drops of water onto the surface. If it beads up, you’re protected, but if it absorbs and turns the wood dark, it’s time to reapply.
Keep your surfaces clean by sweeping regularly and avoiding standing water trapped by wet leaves or planters. This is a simple yet effective way to protect your deck! Dust, debris, and rotting leaves trap moisture and damage your deck if left alone for too long. Check out our deck wood maintenance tips for more advice!
When it comes to protecting outdoor wood furniture, the same rule applies: moisture is the enemy. Even waterproofed furniture will eventually suffer from extended periods of water exposure. Elevate your outdoor furniture whenever possible. Placing chairs or tables on a hard patio surface rather than directly on damp grass prevents continuous moisture transfer into the legs. Rubber or epoxy feet are also great additions to protect those vulnerable end grains.
5. Material Choice: When to Start Fresh
Sometimes, despite our best efforts, a deck is simply beyond saving. If your wood is deeply rotted, splintering, or structurally compromised, it might be time to replace it entirely.
When starting fresh, the choice of material is everything. Durable, high-quality materials often cost more upfront, but they’re manufactured to resist moisture, pests, and other outdoor hazards that reduce your deck’s lifespan.
Pressure-treated deck boards, composite, and PVC decking are common options, but we always recommend premium hardwood decking. Not only is it beautiful, natural wood that enhances your deck’s visual appeal, but it’s also durable, low-maintenance, and eco-friendly.
At Dakota, we’re proud to carry Black Label™ Premium Decking, an architectural-grade lumber handpicked for top-tier quality and sustainability. Black Label hardwoods (like Ipe, Cumaru, Garapa, and Bulletwood) are 100% certified by FSC or Unifloresta. These naturally durable, exotic hardwoods are naturally resistant to fungi, termites, and rot, and even carry an “A” fire-resistance rating. It’s a low-maintenance investment in a beautiful outdoor space that will literally last a lifetime!
Ready to tackle your next outdoor project or upgrade to a premium deck? Reach out to Dakota Hardwoods or check for nearby locations!
