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It's not recommended to place new decking over old decking. Doing so can hide decay beneath the surface, especially where fasteners penetrate the joists. Instead, it's best to repair or replace damaged joists to ensure the structural integrity of your deck. While some products claim to make overlaying possible, they can increase the risk of moisture damage and rot, and may create spaces where insects can nest. This approach also complicates matters on decks with multiple levels or stairs. Addressing issues directly ensures your deck remains safe and durable.

You should refinish a deck because it needs regular upkeep to maintain its appearance and functionality, especially if you live in a harsh climate. Timely maintenance combats the effects of constant wear and weather exposure. Regular inspections for warping, fading, and water damage alert you to the need for immediate refinishing. Maintaining a consistent schedule reduces repair costs and sustains your deck’s lasting charm and strength.

It's a good idea to restain or refinish your deck every two to three years. The exact timing depends on factors like how much you use your deck and local weather conditions. Keep an eye out for signs that your deck needs attention, such as fading color, splintering, warping, cracking, or mold and mildew growth. Regular maintenance not only keeps your deck looking great but also saves you money in the long run by preventing costly repairs.

Choosing between painting and staining your deck depends on your priorities. Painting creates a durable protective layer, with oil-based paints offering excellent moisture resistance and latex-based paints providing strong protection against sunlight. However, paint covers the natural look of the wood. If you prefer to showcase the wood’s beauty, staining is the way to go. Stains penetrate the wood, helping to resist rot, mold, and mildew while allowing the grain to show through. Keep in mind that stains may require more frequent reapplication than paint. Consider what matters most to you—protection, aesthetics, or maintenance—when making your decision.