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How Long Do Composite Decks Really Last?

  • Writer: Mark Giannone
    Mark Giannone
  • May 13
  • 2 min read

A spacious, modern composite deck built by C-JAM Construction in Cherry Hill, New Jersey showcasing durable materials and expert craftsmanship.
Discover the longevity and benefits of composite decking compared to traditional wood. Learn why composite decks are a smart, long-term investment for your home.​



If you're investing in a new deck, you don’t just want it to look good — you want it to last.

At C-JAM Construction, we get this question all the time:

“How long does composite decking really hold up compared to wood?”

Let’s break it down based on the latest research, real-life results, and what we’ve seen here in South Jersey.


🧬 What Is Composite Decking?

Composite decking is a blend of wood fibers and recycled plastics. Unlike pressure-treated lumber, it doesn’t absorb water, won’t rot, and doesn’t need sanding, staining, or sealing.

The most trusted brand we install is Trex, known for:

  • Fade and stain resistance

  • Mold and insect resistance

  • Low-maintenance performance


⏳ Average Lifespan: 25–30+ Years

Most composite decks are built to last 25–30 years or more, and many come with 25–50 year warranties, depending on the brand and product line.

Trex offers a 25-year limited residential warranty against fading, staining, and structural defects, making it a solid long-term choice.


👉 See Trex warranty details here.


🛠️ Maintenance Needs: Barely Any

This is where composite shines:

Task

Wood Deck

Composite Deck

Annual sealing?

✅ Yes

❌ No

Rot/mold risk?

✅ Yes

❌ No

Splinters?

✅ Yes

❌ No

Pressure wash?

⚠️ Caution

✅ Optional

A little soap, water, and a light scrub is all most composite decks need.That’s it. No staining. No warping. No headache.


🛠️ Want to compare composite vs. wood? Read our full breakdown here.


🌦️ Weather Resistance in NJ

Composite holds up better than wood in South Jersey’s humid summers and freezing winters. It resists:

  • Moisture absorption

  • Insect damage

  • UV fading

  • Warping or splitting in temperature swings

Even the most well-maintained wood deck can’t compete long-term.


🔨 Built to Last… If Built Right

Even the best materials will fail if installed poorly. At C-JAM, we use:

  • 2x10 joists, not the minimum 2x8

  • 2x12 beams for solid support

  • 6x6 structural posts to prevent twisting or sagging



💰 Long-Term Value

Yes, composite costs more upfront. But over 30 years, you:

  • Avoid costly maintenance

  • Avoid replacing warped/cracked boards

  • Get peace of mind with manufacturer warranties

Over time, it often beats wood on total cost of ownership.


👷‍♂️ Ready for a Deck That Lasts Decades?

Whether you already know you want Trex or still weighing the options, we’ll walk you through it — no pressure, no BS.

📞 Call (856) 329-2933


Let’s build something that holds up — and holds value.




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C-JAM CONSTRUCTION LLC

At C-JAM Construction LLC, we specialize in crafting stunning bathrooms that redefine your home's elegance. But that's not all – we also excel in transforming kitchens, basements, and adding beautiful additions.

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