Here in the Pacific Northwest, we know how much moisture can impact outdoor wood surfaces. Without the right preparation, your deck or fence can quickly show signs of weather damage, mildew, discoloration, warping, and even rot. The good news is that with a little prep work and the right products, you can protect your wood so it not only looks great but also lasts longer.
At Cascade Fence & Deck, we always recommend cleaning and sealing before the rainy season begins. Here’s our step-by-step process, based on years of experience helping homeowners in Washington and Oregon protect their outdoor spaces.
Step 1: Clean the Wood
The first and most important step is getting your wood surface completely clean. If you skip this step, your sealer won’t absorb properly.
Clear debris: Sweep off leaves, dirt, and dust.
Apply cleaner: Use a quality deck cleaner, following the manufacturer’s instructions.
Scrub or pressure wash: Work the cleaner into the grain with a stiff brush. If using a pressure washer, keep it on a low setting and move with the grain to avoid damaging the wood fibers.
Rinse thoroughly: Wash away all traces of the cleaner with a garden hose.
Step 2: Allow the Wood to Dry
This is where patience pays off. Wood must be completely dry before sealing.
In our climate, plan for at least two full dry days after cleaning. This is why getting ahead of the rain and sealing in the summer is key.
Avoid sealing if rain or heavy dew is expected within 24–48 hours.
Rushing this step is one of the most common causes of peeling, flaking, or uneven finishes.
Step 3: Seal the Wood
Now comes the protective finish. A high-quality waterproofing sealer will keep water from penetrating while making the natural beauty of the wood pop.
Choose the right sealer: Look for a transparent or semi-transparent product designed specifically for outdoor wood.
Stir thoroughly: Always stir the product before and during use don’t shake it, as that can create air bubbles.
Apply evenly: Use a brush, pump sprayer, or roller to apply a thin, even layer. Work the sealer into the grain and watch for liquid pooling.
Allow proper drying time: Follow the manufacturer’s instructions and keep the area dry until the surface is fully cured.
Pro tip: Multiple thin coats provide better protection than one thick coat and dry faster too.
Maintenance Tips
To keep your deck or fence in top condition year-round:
Annual cleaning: At minimum, wash your wood surface once a year to remove dirt, mildew, and algae.
Inspect for damage: Check for loose nails, screws, or boards and repair right away.
Reapply sealer: Depending on your wood and weather conditions, expect to reseal every 1–3 years.
Why This Matters
Rain is relentless in the Northwest. By properly cleaning, drying, and sealing your deck or fence now, you’ll avoid costly repairs later. It’s one of the best investments you can make in your outdoor living space.