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Crack Repair and Prevention for Your Composite Deck in 2024

How to repair damaged composite decking

Julian Mossanen |

Understanding the Causes of Cracked Composite Decking

Cracked composite decking can be a frustrating issue, and understanding the underlying causes is crucial for effective prevention and repair. Here’s a look at some common factors that contribute to decking cracks:

Foundation Issues

A solid foundation is essential for the stability of any deck. If the foundation is unstable or improperly installed, it can cause the deck to shift or settle unevenly, leading to cracks in the composite decking boards. Ensuring that the foundation is level and properly supported can prevent these problems.

Joist Span

The joist span or the distance between the support beams underneath the deck, plays a significant role in the deck’s durability. If the joists are spaced too far apart, the composite decking may not have adequate support, leading to sagging and cracks. Following the manufacturer’s guidelines for joist spacing is crucial for maintaining the integrity of your deck.

Too Much Weight

Excessive weight on the deck can put undue stress on the composite boards, causing them to crack. This includes heavy furniture, grills, or even large gatherings of people. Distributing weight evenly and avoiding placing overly heavy items on the deck can help prevent cracking.

Incorrect Decking Clip and Screw Configuration

Improper installation of decking clips and screws can lead to issues with the composite boards. If clips are not spaced correctly or screws are not driven in at the right angle, it can cause the boards to become loose or shift, resulting in cracks.

Moisture

Moisture is a common cause of deck damage. While composite decking is designed to be resistant to water, excessive moisture can still lead to problems like swelling, warping, or cracking. Proper drainage and regular cleaning to remove debris can help manage moisture levels and protect your deck from damage.

How to Repair Cracks in Composite Decks

Repairing cracks in composite decking is a straightforward process that can help restore the appearance and functionality of your outdoor space. Below are the materials needed and the steps to effectively repair cracks:

Materials Needed:

1. Composite Decking Filler

A specialized filler designed for composite materials that will seamlessly blend with the deck’s surface. Ensure the filler matches the color of your decking for a uniform appearance.

2. Putty Knife

Use a putty knife to apply and smooth the filler into the cracks.

3. Masking Tape

Use masking tape to outline the area around the crack. This helps prevent the filler from spreading onto unaffected parts of the deck and ensures a cleaner, more precise repair.

4. Air Compressor

An air compressor can be useful for blowing out any debris or dust from the crack before applying the filler. This ensures a clean surface for better adhesion.

5. Wire Brush or Sandpaper

A wire brush or fine-grit sandpaper will help clean out the crack and roughen the surface for better adhesion of the filler.

6. Cleaner or Degreaser

Clean the area around the crack to remove dirt, debris, or grease that might interfere with the repair process.

7. Cloth or Sponge

A cloth or sponge will be used for wiping away excess cleaner and for smoothing the filled area.

8. Paintbrush (Optional) 

For touch-ups or applying a color match, a small paintbrush might be needed.

Repair Steps:

1. Clean the Area: Start by cleaning the area around the crack with a cleaner or degreaser. Use a wire brush or sandpaper to remove any loose debris and roughen the surface of the crack for better filler adhesion.

2. Prepare the Filler: Follow the manufacturer’s instructions to prepare the

3. composite decking filler: If the filler needs to be mixed, ensure it is well combined to achieve the best results.

4. Apply Masking Tape: Apply masking tape around the crack to protect the surrounding decking from any filler that may spread during application.

5. Apply the Filler: Using a putty knife, carefully apply the filler to the crack. Press it firmly to ensure the filler fills the entire crack and is well-adhered to the deck surface. Smooth the filler level with the surrounding decking.

6. Let it Dry: Allow the filler to dry according to the manufacturer’s recommended time. Avoid using the deck until the filler is completely cured to ensure a solid repair.

7. Sand and Smooth: Once the filler is dry, use sandpaper or a fine-grit sanding block to smooth the area. This step helps blend the repaired section with the rest of the deck and eliminates any excess filler.

8. Clean Up: Wipe away any dust or debris from sanding with a damp cloth or sponge. If needed, touch up the area with matching paint to ensure a seamless finish. Remove the masking tape carefully to reveal a clean, repaired surface.

    How to Prevent Cracks in Your Composite Boards

    Preventing cracks in your composite decking is essential for maintaining its longevity and appearance. By focusing on high-quality materials, proper installation, and ongoing care, you can minimize the risk of damage. Here’s how to ensure your composite boards remain in top condition:

    Prevention Tip 1: Buy High-Quality Composite Decking Boards at Composite Deck Direct

    high quality composite decking

    Preventing cracks in composite decking begins with selecting top-notch materials. To ensure the best results, choose Composite Deck Direct for all your decking needs. We provide a range of advantages, such as:

    • Advanced Heat Blocking Technology: Keeps your deck cooler under the sun.
    • Fade and Stain Resistant: Comes with a 25-Year Limited Warranty for long-lasting protection.
    • Rice Husk Formula: Ensures no rotting or molding.
    • Fire Retardant: Made without wood for added safety.
    • Superior Durability: Outperforms other composite boards in resilience.
    • Eco-Friendly: Composed of 95% recycled materials.
    • Reversible Boards: Capped on all four sides for enhanced durability.
    • Lightweight: Easier to handle and install.
    • Variety of Colors: Available in 12 different shades to match your design preferences.

    Prevention Tip 2: Correct Installation

    Proper installation is essential for preventing cracks. Follow our installation guidelines for accurate spacing and alignment, ensuring joists and decking clips are correctly placed. Secure the boards firmly to prevent shifting or sagging, which can cause damage over time.

    Prevention Tip 3: Maintenance and Care

    Regular upkeep is essential for prolonging the life of your composite decking. Clean the deck frequently by removing debris and standing water. Inspect for wear or damage and address any issues promptly. Use mild cleaners and soft brushes for cleaning, and ensure proper drainage to prevent moisture-related problems.

    For more expert advice on cleaning and maintaining composite decking, check out our detailed blog post filled with essential tips. Click here to learn more.