5 Essential Tips for Protecting Your Deck

Outdoor kitchens, lavish patios, and expansive decks are becoming increasingly popular in the U.S. as people seek to enhance their outdoor living spaces for dining, relaxation, and entertainment. In some areas, a deck can even function as a seasonal living room during spring, summer, and fall. While living on a deck can be laid-back and comfortable, wood and composite decks require regular upkeep. Even treated wood deteriorates with time, and the effects of water, humidity, and sun exposure can quickly leave your wooden sanctuary looking worn and weathered. Let’s explore five ways to keep your deck in top shape.

5. Stay Vigilant

It’s tempting to think that a solid wood deck will be resistant to the elements for a few years, at least. However, the reality is that decks endure a lot of wear even in a single season. The flat surface of a deck reacts differently from a wooden wall, for instance. Water sits on the wood longer, and sunlight can be more concentrated and damaging due to the lack of overhead protection. Foot and pet traffic, as well as moisture issues caused by plants or objects blocking airflow, can also cause your deck to age faster than expected.

Over time, nails can begin to loosen from deck floorboards, potentially causing injuries. Boards may warp or crack, while dirt, dead leaves, and bird droppings can accumulate between the boards, staining and discoloring the finish. These issues develop gradually, but keeping a close eye out for signs of insect activity, mildew, loose stair treads, standing water, and unstable railings can help you assess how your deck is aging and create an effective plan for seasonal upkeep.

4. Perform Regular Maintenance

You can extend the life and appearance of your wood or composite deck by proactively addressing potential issues. Sweep your deck regularly and avoid letting leaves, especially damp ones, gather. Keep shrubs at least a couple of feet away from your deck, particularly on the shady side of your yard. Use a five-in-one painter's tool to remove debris from between the floorboards. Clean up food stains and bird droppings immediately. If you have potted plants, raise them to allow airflow underneath, or move them around from time to time.

There are additional steps you can take to protect your deck. Just like the hardwood floors inside your home, your deck is susceptible to scratches and gouges. Your pets' claws and even high heels can damage the wood if you're not careful. Always lift furniture when moving it across your deck, trim your pets' nails, and treat your deck as another part of the flooring in your home.

3. Keep Your Deck Sealed

An unprotected deck will wear down quickly. Even though pressure treated wood resists rot and insect damage, it can still crack and split from exposure to water. The best way to protect your deck in the long term is to apply a deck preservative. There are specific sealers, stains, and paints available that are designed for deck use. While they vary in appearance, all of them shield wood and composite decks from moisture, fungal growth, and UV damage. Some even include fire retardants.

Deck protection products work well, but they have one significant limitation: They gradually lose their effectiveness and need to be reapplied. Typically, the more expensive the product, the longer its protection lasts, but there is no permanent solution for wood deck protection. To maintain your deck's integrity, it’s crucial to reapply wood sealer regularly, ideally in the fall when temperatures are stable and rain is unlikely for a week or more. Once a year is considered standard, though newer products may extend the reapplication interval to every three or four years, if you're lucky.

2. Clean Your Deck

No deck preservative will be effective unless you first clean the surface, and preparing your deck for its protective coat can be a big job without the proper tools. Many professionals use pressure washers along with cleaning and pretreating products designed to lift grime and remove loose wood particles. One of the most effective and popular pretreaters today is oxygen bleach, which has a foaming action that reduces the need for excessive scrubbing. It’s also an eco-friendly and landscape-safe choice. Other options include chlorine bleach and TSP (Trisodium Phosphate), but these can be harsh and harmful to the environment.

There is some debate over whether pressure washing wood is ideal. Some experts argue that the high-pressure water damages the wood's surface, leaving it rough and requiring resanding. Others believe the wear is minimal and that the quick cleaning process justifies the potential risk. If you opt for pressure washing, start with the lowest pressure setting, around 500 psi, and gradually increase as needed. Be sure to read up on how to properly use a pressure washer on wood surfaces. For cleaning spindles and stairs, a shorter wand may be necessary to reach tight corners. Remember, the technique is key – smooth, even movements are essential. As with any task, great wand work is not just for wizards in the Harry Potter universe [source: Haege].

Once your deck is clean, allow it to dry thoroughly. Three dry days with temperatures above 40°F (4°C) will ensure the deck is dry enough for sealer application [source: How to Clean Things].

1. Know Your Deck Products

While building your deck may have focused on aesthetics, maintaining it requires following precise instructions. Wood may seem tough, but it's not invincible. When using power washers or selecting specific stains and protectors, you’re handling strong chemicals and equipment. Deck maintenance products are created for a particular method of use, and failure to apply them correctly, as per the manufacturer’s guidelines, can lead to complications.

It might sound overly cautious, but reading the instructions on the products you use is crucial for avoiding unnecessary headaches in deck maintenance. For instance, using a pressure washer against the grain of the wood can leave visible marks that will require sanding to remove. Applying sealer during cold weather, before rain, or on damp wood could cause your deck to remain sticky for days or even weeks, preventing you from achieving the smooth, finished look you desire. Worse, any mistakes you make will likely affect your deck for years to come. The key is simple: always read and follow the directions carefully every time.