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Common Composite Decking Problems and How to Fix Them

Composite decking has revolutionized outdoor spaces, offering durability, aesthetics, and low maintenance. However, like any material, it can encounter issues over time. Builders and homeowners in Iowa looking for long-lasting solutions often turn to Ankeny Deck Specialist, a trusted name in composite deck builder services in Iowa. Whether it’s fading, warping, or mold buildup, understanding potential problems and their fixes ensures your deck remains in top condition.

Fading and Discoloration

One of the most frequent concerns is color fading due to prolonged sun exposure. Although modern composite boards come with UV protection, older or lower-quality ones may still fade over time.

How to Fix It?

  • Regular cleaning with a mild soap solution can prevent dirt buildup that exacerbates fading.
  • Applying a composite deck brightener can help restore some of the lost vibrancy.
  • If fading is significant, a manufacturer-approved composite deck stain can bring back color without harming the material.

Mold and Mildew Growth

Composite decking is resistant to rot, but mold and mildew can still develop, especially in damp or shaded areas. This is typically caused by organic debris trapped in the board’s surface texture.

How to Fix It?

  • Use a soft brush and a mixture of water and white vinegar to scrub affected areas.
  • Avoid harsh chemicals like bleach, which can break down the protective coating of composite boards.
  • Ensuring proper drainage and airflow beneath the deck reduces moisture buildup.

Warping and Cupping

While composite decking is engineered to resist warping better than wood, extreme temperature fluctuations or improper installation can still lead to cupping or uneven surfaces.

How to Fix It?

  • If boards have minor warping, applying heat with a heat gun and gently reshaping them can work.
  • Severe warping often indicates improper joist spacing or lack of ventilation. Reinforcing the frame may be necessary.
  • Following manufacturer installation guidelines is crucial to prevent warping from the outset.

Scratches and Surface Damage

Though composite decking is more scratch-resistant than wood, dragging furniture or dropping heavy objects can still cause damage.

How to Fix It?

  • Minor scratches often blend in over time with exposure to weather.
  • A heat gun can sometimes be used to soften the surface and reduce the visibility of scratches.
  • Composite deck repair kits with wax-based fillers provide a quick touch-up solution for deeper scratches.

Staining from Spills

Food, grease, or drink spills can leave marks, particularly on lighter-colored decking. Some composite materials are more stain-resistant than others, but all benefit from prompt cleaning.

How to Fix It?

  • Clean up spills immediately with warm, soapy water.
  • For stubborn stains, a composite deck cleaner specifically designed for stain removal can be used.
  • Sealing the deck isn’t necessary for composite boards, but using outdoor furniture pads can help prevent oil-based stains.

Expansion and Contraction

Temperature changes cause composite decking to expand and contract. If boards were installed too tightly or without adequate spacing, they may buckle or create gaps.

How to Fix It?

  • Ensure the correct spacing between boards during installation. Most manufacturers recommend a small gap to allow movement.
  • If boards have already been installed too tightly, removing and re-installing them with proper spacing is the only long-term fix.

Loose or Noisy Boards

Some decks develop squeaks or slight movement over time, often due to improper fastening or structural shifting.

How to Fix It?

  • Tighten loose fasteners and ensure they are properly secured to joists.
  • Use hidden fastener systems for a cleaner appearance and better board stability.
  • If noise persists, adding rubber shims between the boards and joists can reduce movement and creaking.

Water Pooling and Drainage Issues

Standing water on composite decks can lead to slippery surfaces and promote mold growth. Poor drainage is often the result of improper slope or clogged gaps.

How to Fix It?

  • Ensure a slight slope during installation to allow water runoff.
  • Keep gaps between boards clear of debris to facilitate drainage.
  • Installing an under-deck drainage system can help divert water away from the structure.

Insect and Rodent Intrusion

Although composite decking doesn’t attract termites like wood, small rodents or insects can still find their way into deck framing if there are gaps.

How to Fix It?

  • Inspect for small entry points and seal them with a weatherproof caulk or metal mesh.
  • Keep landscaping trimmed to prevent rodents from nesting near the deck.
  • Using composite materials with solid-core construction can further deter pests.

Heat Retention and Hot Surface Discomfort

Dark-colored composite decks can become hot under direct sunlight, making them uncomfortable to walk on barefoot.

How to Fix It?

  • Opt for lighter-colored boards that absorb less heat.
  • Install a shade structure or use outdoor rugs in high-traffic areas.
  • Spraying the deck with water occasionally can help cool down the surface on extremely hot days.

Why Choose Ankeny Deck Specialist?

When it comes to composite decking, expert installation and maintenance make all the difference. Ankeny Deck Specialist brings years of experience, precision craftsmanship, and a commitment to quality that ensures every project stands the test of time. From proper board spacing to using top-grade materials, every deck is built for durability and aesthetic appeal.

For builders and homeowners seeking trusted solutions for their outdoor spaces, Ankeny Deck Specialist delivers excellence at every stage, ensuring decks remain beautiful and functional for years to come.

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