How Long Does Composite Decking Last?

Many people use their decks to make their living space bigger. Composite wood decking has become a popular choice for places outside that need to last. It usually lasts 25 to 30 years or more, which is a lot longer than most wooden decks, which only last 10 to 20 years normally.

Top-notch capped composite decks can last up to fifty years or more. These materials don’t get wet, rot, bend, or attract bugs. Unlike wood, they don’t need nearly as much upkeep. This piece talks about how long composite decking lasts and what factors affect it.

Longevity Advantages of Composite Decking

Most traditional wooden decks only last between 10 and 15 years. To last this long, it needs strict and frequent upkeep, like sealing, staining, cleaning, and repairs once a year. Composite wood decking, on the other hand, has important longevity advantages:

• Standard composite decking: Average lifespan of 25-30 years.
• High-quality capped composite decking: Service life extends to 30-40 years.

In the long run, this means that composite decking is a much better investment than standard wood. The cost savings of composite deck materials become even clearer after 10 years or more. This is because it usually doesn’t need to be replaced, while wooden decks might need to be completely fixed up or replaced.

Key Factors Affecting Composite Deck Lifespan

The lifespan of composite deck boards depends on multiple factors. These primarily include:

Material Quality and Manufacturing Process

How long composite decking lasts depends mostly on the quality of its materials and how it was made:

• Material Technology: Modern composite decking tightly bonds wood fibers with plastic polymers. This material composition provides enhanced structural strength and weather resistance.
• Polymer Cap: Capped composite decking has a polymer cap that protects the surface. This layer protects better against UV light, which slows down fading. Furthermore, it has great resistance to scratches and wear.
• Material Composition: The amount of plastic and wood fibers in different types of composite decks varies. This ratio also has an effect on behavioral traits. The type of plastic used is equally important. For instance, high-density polyethylene (HDPE) outperforms polyvinyl chloride (PVC) in certain properties.

Installation Quality

Proper installation is crucial to ensuring composite deck materials achieves its intended lifespan. Pay attention to the following points during installation:

• Proper Spacing: There must be enough space between the composite decking boards to allow for the expansion and shrinkage that happens when the temperature changes. If there isn’t enough space between the boards, they may twist or deform. Too much space between things could be dangerous.
• Framework Structure: Even the best composite deck boards won’t work as well if they are put down on a frame that isn’t up to par. The framework should be made of pressure-treated wood or a composite frame that is just as strong. Make sure you have enough support throughout.
• Ventilation Design: It is very important to keep the air flow good under the deck. Moisture doesn’t build up when there is enough wind, which stops mold and algae from growing. In this way, the frame stays dry and strong.
• Drainage System: A small slope should be built into the deck so that water can drain away easily. Make sure that water doesn’t collect on the boards.

Environmental Factors

The natural environment surrounding composite decks also impacts its longevity.

• UV Exposure: Intense sunlight causes gradual fading in all outdoor materials. High-quality composite decking contains UV inhibitors that significantly slow this process.
• Humidity and Rainfall: Even though composite decking is waterproof, surface mold may still grow if it is exposed to high humidity for a long time.
• Temperature Fluctuations: Extreme changes in temperature cause things to expand and shrink. Good composite deck materials can handle these changes better. But for a good installation, there must be enough space for expansion.
• Geographic Location: Certain environmental conditions, such as salt spray from the coast or air pollution from factories, can shorten the life of composite decks.
• Deck Orientation: Decks that face south get more sunshine and may fade faster than decks that face north. You might want to put up shade structures or pick composite decks that protect against UV rays better.

Daily Use and Loading

Beyond the factors mentioned above, how the deck is used also impacts its longevity.

• Furniture: Sharp legs on heavy furniture can leave indentations in composite decking. Using furniture pads distributes weight and protects the deck surface.
• Usage Frequency: High-traffic areas like entryways wear faster than low-traffic zones. Regularly repositioning rugs or furniture helps distribute wear more evenly.
• Special Uses: Extra safety measures need to be taken if the deck is going to be used to hold big or hot things like grills or hot tubs.

How to Extend the Lifespan of Composite Decking Through Proper Maintenance

Unlike wooden decking, composite decking does not require tedious sealing or staining. However, regular maintenance and cleaning are crucial for extending its lifespan:

Cleaning Frequency and Timing

Composite decking is less prone to staining than wooden decking. Therefore, cleaning at the following intervals is generally sufficient:

• Weekly sweeping to remove leaves, dust, and debris.
• Quarterly deep cleaning.
• Annual spring and fall deep cleanings.

Cleaning Methods

Standard cleaning steps include:

• Use a soft-bristle broom or leaf blower to clear surface debris.
• Rinse the deck surface with a garden hose.
• Use a cleaner made just for composite decks or soapy water. Stay away from strong acidic or alkaline cleaners.
• Gently scrub stubborn stains with a soft-bristled brush.
• Rinse thoroughly to ensure no cleaning residue remains.

Seasonal Maintenance

In addition to routine cleaning, specific maintenance and inspections should be performed quarterly.

• Spring Maintenance: Inspect for potential winter damage. Clean gutters and downspouts. Don’t forget to check and tighten any loose screws or fasteners.
• Summer Maintenance: Sweep regularly to prevent leaf and debris buildup. Promptly clean up spilled food and beverages. Additionally, check for signs of mold or algae growth.
• Fall Maintenance: Clear fallen leaves to prevent accumulation and decay. Prepare for winter by preemptively inspecting drainage systems. A deep cleaning is recommended in the fall.
• Winter Maintenance: Promptly remove snow to avoid prolonged ice and snow buildup. Use plastic shovels for snow removal to prevent surface scratches from metal tools. If de-icing agents are necessary, select products safe for composite decking.

Special Stain Treatment

Specific cleaning and treatment methods are required for the following stains:

• Mold and Algae: Mold can’t grow as easily on composite decks as it can on wood, but it can still happen in damp, shady places. Use a cleaner made especially for composite deck mold to scrub it, and then rinse it well.
• Oil and Food Stains: Immediately blot spills with absorbent material. Then scrub with mild dish soap and warm water. Use a specialized cleaner for stubborn grease stains.
• Rust: Treat with an oxalic acid cleaner and rinse thoroughly. Always strictly follow the product’s usage instructions.

Proper Use of Pressure Washers

Pressure washers are common tools for outdoor cleaning. However, improper use can damage composite wood decking. Therefore, observe the following precautions:

• Safe Pressure: Pressure should not exceed 1500 psi. Maintain a safe distance between the nozzle and the deck surface.
• Correct Angle: Use a fan nozzle and clean at a 45-degree angle. Avoid direct vertical impact on surfaces to prevent damage to the protective layer.
• Water Flow Direction: Clean along the grain direction of the deck to prevent damage to the wood grain pattern on the composite surface.

Conclusion

Composite decking fixes many problems with standard wood decking. It lasts a very long time and doesn’t cost much to maintain. Composite decking lasts at least 25 to 30 years, so it’s a good investment for houses and a great way to enjoy the outdoors. Feel free to get in touch with us if you have any more questions about composite decks. The professional team at COOWIN is ready to help.

FAQ

Can Composite Decking Really Last over 25 Years?

Yes, if you build and take care of good composite decking properly, it can easily last more than 25 years. A lot of companies give warranties that last longer than 25 years.

Does Composite Decking Require Staining or Sealing?

Not at all. Composite wood doesn’t need to be stained or sealed at all. These kinds of treatments can hurt the protective layer on the surface, which can hurt both performance and appearance. Its color is built into the material, so it won’t need to be repainted as wood does.

Does Composite Decking Fade?

All materials used outside fade over time when they are exposed to sunshine. Good composite decking, on the other hand, fades very slowly and evenly. Its color change stays within accepted ranges even after long-term use.

Can Composite Decking be Repaired After Damage?

Most of the time, small damage can be fixed, but if it’s bad enough, whole boards may need to be replaced. Professionals should look at and fix structures that have been severely damaged.

Do composite decks get very hot in the sun?

When decks are in the sun, the surface temperature does rise. The temperature is mostly based on what color they are. Decks with darker colors absorb more heat, so the surface is warmer than decks with lighter colors. Because of this, we suggest picking lighter-colored goods in hot areas. Pergolas, umbrellas, and canopies are some examples of buildings that can help you get more shade.