Cedar vs. Composite Decks in Olympia
Which PNW Decking is Best?

In Washington's wet climate, composite decking offers superior durability and lower maintenance compared to cedar. Composite materials like Trex and TimberTech resist the mold, algae growth, and rot that commonly affect cedar in Olympia's 50+ inches of annual rainfall. While cedar is naturally beautiful and costs less upfront, composite decking doesn't require staining every 2-3 years and comes with warranties up to 50 years. For homeowners prioritizing long-term value and minimal upkeep, composite is typically the better choice for PNW conditions.

Custom cedar decks in Olympia start at approximately $45 per square foot, including materials and professional installation. This lower upfront cost is appealing, but remember that cedar requires regular maintenance—staining every 2-3 years at additional expense. The final price depends on deck size, complexity, railing style, and any custom features. For a typical 200 sq ft deck, expect to invest $9,000-$12,000. While cedar's initial cost is lower than composite, factor in long-term maintenance expenses when budgeting your project.

In Olympia's climate, a well-maintained cedar deck typically lasts 15-20 years, while composite decking can last 25-50 years. The key factors are regular maintenance and protection from moisture. Cedar requires consistent staining and sealing to prevent rot and UV damage. Composite materials are engineered to withstand PNW moisture without degrading. Both materials benefit from proper installation with pressure-treated framing and adequate ventilation. Local shade and moisture exposure also impact longevity—decks under tree canopy or in constant dampness may have shorter lifespans without proper care.

Modern composite decking includes heat-dissipation technology that significantly reduces surface temperatures compared to older composite materials. While composite can get warmer than natural cedar in direct sunlight, lighter color choices stay cooler than darker tones. In Olympia's moderate summers, heat is rarely an issue—our climate doesn't produce the extreme temperatures that make composite uncomfortable in other regions. Most homeowners find composite perfectly comfortable for barefoot use during typical PNW summer days.

You should never use cedar for the frame—always use pressure-treated lumber for deck framing, regardless of your decking material choice. This is standard industry practice and ensures structural longevity. Pressure-treated joists resist rot and insects far better than cedar. We also recommend installing joist tape over the framing before laying composite boards to prevent moisture contact and extend the life of your structure. This combination gives you a durable foundation that will outlast your decking surface.

Cedar decks in Lacey typically need staining every 2-3 years to maintain protection and appearance. Signs that it's time to restain include graying wood, lack of water beading (perform a simple water test—if water soaks in rather than beading up, it's time), and visible UV damage or fading. In particularly wet or shaded areas common in Lacey neighborhoods, you may need to restain more frequently. Regular cleaning and annual inspections help you catch the right timing. This ongoing maintenance is one reason many homeowners ultimately choose composite decking.

Quality composite decking features embossed grain patterns and textured surfaces specifically designed for slip resistance when wet. Modern composite boards from manufacturers like Trex and TimberTech meet industry safety ratings for traction. Regular cleaning to prevent algae buildup is important—algae can create slippery conditions on any surface. In our experience installing decks throughout Olympia and Shelton, properly maintained composite decking provides excellent slip resistance even in our rainy climate.

Both have environmental benefits. Cedar is a renewable resource, especially when sourced from sustainably managed Pacific Northwest forests. Composite decking is often made from recycled plastics and reclaimed wood fibers, diverting waste from landfills. However, cedar requires chemical stains and sealers for maintenance, which can have environmental impacts. Composite's longevity (25-50 years vs. 15-20 for cedar) means less frequent replacement and lower lifetime resource consumption. For local sourcing and supporting regional forestry, cedar wins. For long-term sustainability and waste reduction, composite edges ahead.