Composite decking is a popular choice for outdoor spaces due to its durability and low maintenance. However, there are certain factors that can gradually deteriorate the quality of this versatile material. From prolonged exposure to the sun’s harmful UV rays to neglecting regular cleaning and maintenance, it’s important to be aware of what ruins composite decking to ensure it remains in top-notch condition for years of enjoyment. Let’s explore some common culprits that can mar the beauty and strength of your composite deck, and learn how to protect this investment in your outdoor oasis.
Pool chemicals
Chlorine
Chlorine is a commonly used pool chemical that helps to sanitize the water and keep it free from harmful bacteria. While chlorine is essential for maintaining a clean and safe swimming pool, it can have a negative impact on composite decking. The high levels of chlorine in pool water can cause discoloration and fading of the decking material over time. Additionally, chlorine can react with the composite material, resulting in a breakdown of the decking surface. To prevent damage from chlorine, it is important to rinse off the decking after pool use and consider using a protective mat or rug in areas with heavy chlorine exposure.
Bromine
Like chlorine, bromine is another pool chemical that is used to sanitize the water. While bromine is generally considered to be less harsh than chlorine, it can still cause damage to composite decking if not properly managed. The high levels of bromine in pool water can lead to discoloration, fading, and surface degradation of the decking material. To protect your composite decking from bromine damage, it is important to take similar precautions as with chlorine – rinsing off the decking after pool use and using protective mats or rugs in high exposure areas.
Salt
Salt is commonly used in saltwater pools for sanitation purposes. While saltwater pools are known for being gentler on the skin and eyes compared to chlorine or bromine pools, the salt content can still cause damage to composite decking. The high salt concentration can corrode the surface of the decking material, leading to rusting of metal components and deterioration of the composite boards. To minimize salt damage, rinsing off the decking after pool use and regularly removing any salt residue is crucial. Additionally, using stainless steel hardware and choosing composite decking with good resistance to salt corrosion can help prolong the lifespan of your deck.
Weather and sunlight exposure
UV rays
One of the primary factors that can damage composite decking is prolonged exposure to UV rays. The ultraviolet radiation from the sun can cause the color of the decking material to fade over time, leaving it looking dull and worn out. Moreover, UV rays can break down the chemical bonds within the composite material, causing it to become brittle and more susceptible to cracking and splintering. To prevent UV damage, it is advisable to choose composite decking that has been specifically designed to resist fading and UV degradation. Additionally, applying a UV-resistant sealer or stain can provide an extra layer of protection for your deck.
Heat
Composite decking, like any other material, can be affected by high temperatures and heat exposure. Excessive heat can cause the decking boards to expand, resulting in warping, bowing, and potential structural issues. In extreme cases, prolonged exposure to high heat can even cause the composite material to melt or deform. To avoid heat damage, it is essential to provide adequate ventilation to your deck, allowing for proper air circulation and heat dissipation. Additionally, using lighter-colored decking material and providing shade or installing awnings can help reduce the heat absorption and minimize the risk of heat-related damage.
Moisture
While composite decking is designed to be moisture-resistant, prolonged exposure to excessive moisture can still cause problems. Moisture accumulation can lead to the growth of mold and mildew, which can discolor the decking material and create an unsightly appearance. Moreover, excessive moisture can cause the composite boards to swell, warp, and even rot over time. To prevent moisture damage, it is crucial to ensure proper drainage for your deck, allowing water to flow away from the structure. Regular cleaning and maintenance, including removing debris and leaves from the deck surface, can help prevent moisture buildup and prolong the lifespan of your composite decking.
Mold and mildew
Moisture accumulation
Mold and mildew thrive in damp and humid environments, and composite decking can provide an ideal breeding ground for these unsightly and potentially harmful organisms. Moisture accumulation, whether from heavy rain or inadequate drainage, creates the perfect conditions for mold and mildew growth. To prevent mold and mildew, it is important to ensure proper ventilation and drainage for your deck. Regularly sweeping and cleaning the deck surface, especially in areas prone to moisture buildup, can help eliminate any potential sources of mold and mildew growth.
Lack of ventilation
Insufficient ventilation is a common issue that can contribute to mold and mildew growth on composite decking. When air cannot properly circulate around the deck boards, moisture can become trapped and create a breeding ground for mold and mildew. To improve ventilation and prevent mold growth, ensure that there is adequate spacing between deck boards, allowing air to flow freely. Additionally, consider using composite decking products with built-in ventilation features, such as grooved boards or raised tile systems.
Scratches and dents
Furniture movement
Furniture movement, especially when heavy items are dragged or slid across the composite decking surface, can cause scratches and dents. The hard materials used in furniture legs and bases can easily damage the relatively softer composite decking material. To prevent scratches and dents, always lift and carry furniture rather than dragging it across the deck. Using furniture leg protectors or felt pads underneath chair and table legs can also provide an extra layer of protection against damage.
Pet claws
If you have pets, particularly those with long nails or sharp claws, they can unintentionally cause scratches and dents on your composite decking. Regular activities such as running, playing, or even scratching can leave marks on the surface of the deck. To minimize damage from pet claws, consider keeping your pets’ nails trimmed and provide them with designated areas for scratching or playing that are not on the deck surface. Additionally, placing rugs or mats in areas frequently used by your pets can help reduce the risk of scratches and dents.
Heavy objects
Dropping or dragging heavy objects, such as tools or equipment, on the composite decking can result in scratches and dents. The impact of heavy objects can cause the decking material to chip or crack, compromising its structural integrity. To avoid damage, exercise caution while handling heavy items and try to avoid dropping or dragging them on the deck surface. If necessary, use protective mats or pads underneath heavy objects to cushion the impact and prevent direct contact with the decking material.
Stains and discoloration
Food and beverage spills
Accidental spills of food and beverages can leave unsightly stains on composite decking if not promptly cleaned. Dark-colored substances like red wine, coffee, or barbecue sauce can be particularly challenging to remove and may result in permanent discoloration. To prevent stains, it is crucial to clean up spills as soon as they occur. Using a mild detergent or composite deck cleaner and a soft brush or cloth, gently scrub the affected area, and rinse thoroughly with water. Regular maintenance, including periodic cleaning, can help keep your composite decking looking its best.
Oil and grease
Oil and grease stains can be persistent and difficult to remove from composite decking. Whether from cooking oils, sunscreen, or automotive lubricants, these substances can penetrate the decking material, leaving behind unsightly marks and discoloration. To tackle oil and grease stains, it is important to act quickly. Immediately remove any excess oil or grease using absorbent materials such as paper towels or cat litter. Then, apply a suitable composite deck cleaner or a mixture of dish soap and warm water to the stained area. Gently scrub the stain, rinse thoroughly, and repeat the process if needed until the stain is fully removed.
Metal rust
Metal objects, such as furniture or decorations, can leave rust stains on composite decking if they come into contact with moisture. Rust stains can be challenging to remove and may require more intensive cleaning methods. One approach is to use a specialized composite deck cleaner specifically formulated to remove rust stains. Follow the manufacturer’s instructions for application and allow the cleaner to penetrate the stain before scrubbing and rinsing. It is crucial to address rust stains promptly to prevent them from spreading and becoming more difficult to remove.
Mold and mildew
As discussed earlier, moisture accumulation can lead to the growth of mold and mildew on composite decking. Besides causing discoloration, mold and mildew can also contribute to the deterioration of the decking material. To tackle mold and mildew stains, it is important to address the underlying moisture issue first. Once the moisture problem is resolved, use a mixture of water and mild detergent or a composite deck cleaner specifically designed to remove mold and mildew stains. Scrub the affected area with a soft brush or cloth, rinse thoroughly, and repeat the process if necessary until the stains are completely eliminated.
Improper installation
Uneven joist spacing
Improperly installed composite decking can lead to various issues, including structural problems and premature wear and tear. One common installation mistake is uneven joist spacing. When the joists that support the deck boards are not evenly spaced, the decking material may not have sufficient support, leading to sagging or even bowing of the boards in certain areas. To ensure proper installation, follow the manufacturer’s guidelines and recommendations for joist spacing. Properly aligned joists will provide the necessary support and help maintain the integrity of the composite decking.
Insufficient clearance
Insufficient clearance during installation can cause problems as the composite decking expands and contracts with changes in temperature and humidity. Without adequate clearance between the boards and adjacent structures, such as walls or posts, the decking material may not have enough room to move, leading to warping or buckling. To avoid issues related to insufficient clearance, carefully plan and measure the installation area before starting the project. Leave the recommended gap between the deck boards and any surrounding structures to accommodate the natural movement of the composite material.
Inadequate support
Inadequate support can compromise the structural stability of a composite deck. Insufficiently anchored or spaced support beams and posts can result in an unstable and unsafe deck. To ensure adequate support, follow the manufacturer’s guidelines for post and beam spacing, as well as recommended attachment methods. Properly secured and spaced support elements will provide the necessary stability for your composite decking, preventing issues such as sagging, bouncing, or even collapse.
Lack of maintenance
Failure to clean regularly
Regular cleaning is crucial to maintaining the appearance and longevity of composite decking. If left uncleaned for an extended period, the deck surface can accumulate dirt, debris, and organic matter, creating the ideal conditions for mold, mildew, and staining. Neglecting regular cleaning can result in permanent discoloration and degradation of the decking material. To keep your composite decking in optimal condition, plan on regular cleaning schedules. Use a mild detergent or composite deck cleaner, along with a soft brush or cloth, to remove dirt and grime. Rinse thoroughly with water to ensure all cleaning agents are removed.
Neglecting to seal
While composite decking is designed to be low-maintenance, applying a protective sealant can offer additional benefits. Sealants can help enhance the color and appearance of the decking material, provide increased resistance against stains and fading, and offer a protective barrier against moisture and UV radiation. Neglecting to seal your composite deck may result in premature wear and tear, requiring more extensive repairs or replacements in the future. To protect and prolong the lifespan of your composite decking, follow the manufacturer’s recommendations for sealing and resealing intervals.
Ignoring repairs
Like any outdoor structure, composite decking may require occasional repairs due to natural wear and tear or unforeseen incidents. Failing to address necessary repairs promptly can lead to further damage and compromise the overall integrity of the deck. Common issues that may require repairs include cracked or damaged boards, loose fasteners, and structural instability. To safeguard your composite deck, inspect it regularly for any signs of damage, and address repairs as soon as they are detected. Consult the manufacturer’s guidelines or seek professional advice for proper repair methods and materials.
Insect and termite damage
Wood fiber content attracting pests
Some types of composite decking incorporate a certain amount of wood fibers, which may attract pests such as insects and termites. Despite the synthetic materials used in composite decking, the presence of wood fibers can still be appealing to wood-boring insects. It is crucial to choose composite decking products with a minimal wood fiber content or select alternative materials that are less susceptible to pest infestations. Regular inspections and preventive treatments can help protect your composite deck from insect and termite damage.
Improperly treated composite materials
Not all composite decking products are created equal when it comes to resistance against insects and termites. The quality and effectiveness of the treatment applied to the composite material can vary, influencing its durability and vulnerability to pest damage. It is essential to choose composite decking from reputable manufacturers that employ proper treatment methods to deter insects and termites. Ensuring that your composite deck is made from high-quality, adequately treated material will help minimize the risk of insect and termite infestations.
Natural weathering
Color fading
Natural weathering is an inevitable process that can affect the appearance of composite decking over time. As the deck is exposed to sunlight, rain, wind, and other environmental elements, its color may fade or change. Exposure to UV rays, in particular, can accelerate the fading process, causing the initial vibrant colors to dull and become less vibrant. While some degree of color fading is normal, choosing composite decking with good color retention properties can help delay the effects of natural weathering. Additionally, applying UV-protective coatings or stains can offer added protection against color fading.
Surface wear
With regular use and exposure to foot traffic, furniture, and other activities, composite decking can experience surface wear over time. Although composite decking is designed to be highly durable and resistant to wear, the constant friction and impact can gradually erode the protective outer layer, leading to a worn and roughened appearance. To minimize surface wear, consider using rugs or mats in high-traffic areas and avoid dragging heavy objects across the deck. Regular cleaning and maintenance can also help remove abrasive particles that can contribute to surface wear.
Cracking
Composite decking can potentially crack due to a variety of factors, including extreme temperature fluctuations and structural issues. The expansion and contraction of the composite material in response to temperature changes can strain the decking boards, resulting in cracks. Inadequate support or improper installation can also contribute to cracking, as the deck may not have the necessary stability to withstand normal usage and environmental stressors. To prevent cracking, choose composite decking with good dimensional stability and make sure it is properly installed. Providing proper support and allowing for sufficient expansion and contraction can help minimize the risk of cracks developing.
