how long does composite decking last

How Long Does Composite Decking Last?

Last Updated: February 5, 2024By

Composite decking has emerged as a favored choice for outdoor spaces, blending aesthetics with durability and low maintenance. As homeowners and builders increasingly turn to this modern alternative, understanding its lifespan becomes paramount.

This article delves into the factors that determine how long does composite decking last. We uncover the key elements influencing longevity, from material quality and climate considerations to installation methods and maintenance routines. By unraveling the science behind composite decking’s endurance, we empower readers to make informed decisions and create outdoor havens that stand the test of time.

What is Composite Decking?

Composite decking is a type of decking material that has gained popularity as an alternative to traditional wood decking. It is engineered by combining wood fibers or sawdust with recycled plastic materials, such as polyethylene or polypropylene. The mixture is then subjected to a manufacturing process involving blending, extrusion, and shaping to create boards that resemble the appearance of natural wood. Composite decking offers several advantages over wood, including enhanced durability, resistance to rot, insects, and UV degradation, and reduced maintenance requirements.

It does not splinter or warp like wood and is available in various colors and finishes. Composite decking is also considered environmentally friendly as it utilizes recycled materials and reduces the demand for virgin timber. Overall, composite decking provides a long-lasting, low-maintenance, and aesthetically appealing option for outdoor decking projects.

Factors Influencing Lifespan

checking’s lifespan is influenced by various interplaying factors, including time, appearance, and functionality, collectively contributing to its durability and functionality.

Material Selection

The choice of deck materials plays a significant role in determining its lifespan. Different types of wood and composite materials have varying levels of durability and resistance to factors like rot, insects, and UV damage. Hardwood species like ipe and teak are more durable for wood decks and have longer lifespans than softwoods like pine or cedar. Composite decking materials, on the other hand, are engineered to be highly durable and resistant to moisture, rot, and insect infestation, leading to longer lifespans compared to natural wood.

Construction Quality

The quality of deck construction is essential for its longevity. A well-built deck with proper structural support, secure connections, and appropriate fasteners is more likely to withstand the test of time. Proper construction techniques, adherence to building codes, and the use of quality materials during installation contribute to the overall durability and lifespan of the deck.

Climate and Weather Conditions

The climate and weather conditions in which a deck is located significantly impact its lifespan. Decks exposed to high humidity, heavy rainfall, extreme temperature fluctuations, or prolonged periods of direct sunlight may experience accelerated wear and damage. Moisture is particularly detrimental to wood decks as it can lead to rot, warping, and mold growth. Harsh weather conditions, such as freezing and thawing cycles or high winds, can also affect the deck’s structural integrity. Proper maintenance and protective measures, such as sealing, staining, or using weather-resistant materials, can help mitigate the effects of climate and weather.

Maintenance Practices

Regular and proper maintenance is crucial for extending the lifespan of a deck. Routine maintenance tasks include cleaning the deck, removing debris, and periodically inspecting for signs of damage or wear. Wood decks may require staining or sealing every few years to protect against moisture and UV damage. Composite decks generally require less maintenance but should still be cleaned periodically to prevent the buildup of dirt and debris. Prompt repairs of any issues, such as loose boards, protruding nails, or deteriorating components, can help prevent further damage and prolong the deck’s lifespan.

Usage and Foot Traffic

The foot traffic and usage a deck receives can impact its lifespan. Decks that experience heavy foot traffic, large gatherings, or the constant movement of furniture and heavy objects may experience more wear and tear. Regularly moving furniture and using protective pads or mats can help minimize scratches and dents.

Pest Control

In areas prone to termite or insect infestation, implementing proper pest control measures can prevent wood decks from suffering damage. Regular inspections and timely treatment can mitigate the risk of pest-related issues that can significantly impact a deck’s lifespan.

Exposure to Vegetation

Decks surrounded by dense vegetation or near trees and shrubs may be more susceptible to moisture retention and increased exposure to organic debris. This can lead to increased mold, mildew, and rot. Trimming vegetation, ensuring proper airflow, and regularly cleaning can help mitigate these issues.

What Is Composite Decking Made Of?

Composite decking is crafted from a blend of materials designed to balance durability, aesthetics, and environmental responsibility. The core components typically include:

Raw Materials

Composite decking is primarily composed of wood fibers and recycled plastic materials. The wood fibers are typically sourced from sawdust, wood chips, or reclaimed wood, while the plastic component is commonly derived from recycled polyethylene (HDPE or LDPE) or polypropylene (PP) materials. These materials are chosen for their strength, durability, and resistance to rot, insects, and UV degradation.


The first step involves blending the wood fibers and plastic materials. The wood fibers are thoroughly dried to remove any moisture content, ensuring better adhesion with the plastic. The dried wood fibers and recycled plastic are then mixed in precise proportions. This blending process may also involve the addition of additives, such as stabilizers, colorants, and UV inhibitors, to enhance the performance and appearance of the final product.


Once the mixture is thoroughly blended, it is fed into an extruder. The extruder is a large machine that consists of a heated barrel and a rotating screw. The mixture is heated and melted within the extruder, creating a molten composite material. The heat helps to soften the plastic and evenly distribute the wood fibers throughout the mixture.


As the molten composite material exits the extruder, it is passed through a shaping die to give it the desired shape and dimensions. The die imparts a profile to the composite material, such as the characteristic grooves and patterns found on decking boards. Cooling mechanisms rapidly cool the shaped composite, solidifying it into the desired form.


After the composite decking boards are shaped, they undergo additional finishing processes. This may include surface texturing to replicate the grain patterns of natural wood, embossing to enhance slip resistance, and the application of protective coatings or sealants to improve weather resistance and prevent fading, staining, or scratching.

Quality Control

Strict quality control measures are implemented throughout manufacturing to ensure consistency and durability. Samples are regularly tested for strength, dimensional stability, resistance to moisture, and other performance characteristics. This helps to maintain high standards and produce composite decking products that meet industry specifications.

How Long Does Composite Decking Last?

how long does composite decking last

It is possible that composite decking will last between 25 and 30 years in the long run. However, several variables affect how long your composite deck will last. Properly maintained decks, constructed with high-quality components, installed using the proper methods, and locations with moderate temperatures frequently perform better than expected.

Regular upkeep, such as cleaning and taking care of little issues immediately, helps composite decking last longer. The broad range serves as a rough reference; in the end, how well you care for your deck will determine how many years of enjoyment it will bring to your outdoor space.

Composite Decking Types

Composite decking comes in various types, each offering unique features and benefits. Here are some common types of composite decking:

  • Wood-Plastic Composite (WPC): Wood-plastic composite decking is a popular type that combines wood fibers or sawdust with recycled plastic materials, such as polyethylene or polypropylene. WPC decking offers the natural appearance of wood while providing enhanced durability and resistance to rot, insects, and UV damage. It is available in different colors, textures, and finishes.
  • Capped Composite: Capped composite decking is similar to WPC decking but has an additional protective cap layer on the surface. This cap is usually made of a more durable polymer material, providing increased resistance to stains, fading, scratches, and moisture absorption. Capped composite decking requires less maintenance and is highly resistant to the elements.
  • PVC (Polyvinyl Chloride) Decking: PVC decking is made entirely of synthetic materials, specifically polyvinyl chloride. It offers excellent durability, moisture resistance, and low maintenance requirements. PVC decking is highly resistant to stains, scratches, fading, and mold growth. It is also available in a variety of colors and styles.
  • Solid Core Composite: Solid core composite decking is engineered with solid construction throughout the board. This type of decking offers exceptional strength, stability, and resistance to sagging or flexing. Solid core composite decking is ideal for areas with high foot traffic and heavy loads.
  • Hollow Core Composite: Hollow core composite decking features a hollow construction with chambers running through the center of the boards. This design reduces the weight of the decking while maintaining durability and strength. Hollow core composite decking is often more affordable and easier to handle during installation.
  • Rice Husk Composite: Rice husk composite decking is a variation of composite decking incorporating rice husk fibers as a sustainable and renewable filler material. This type of decking offers similar benefits to traditional composite decking, such as durability, resistance to rot, and low maintenance requirements.
  • Bamboo Composite: Bamboo composite decking combines bamboo fibers and recycled plastic materials. It provides an eco-friendly decking option with excellent durability, resistance to moisture, and dimensional stability. Bamboo composite decking offers a unique aesthetic appeal and is an alternative to traditional wood decking.

How Does Composite Decking Compare to Wood?

Aspect Composite Decking Wood
Durability Resistant to rot, insects, and decay; no splintering or warping. Prone to rot, insects, and decay; may splinter or warp.
Maintenance Minimal maintenance; no staining, sealing, or painting required. Regular maintenance is needed, including staining, sealing, and painting.
Aesthetics Wide range of colors and textures; consistent appearance. Natural, classic look; color may fade over time.
Environmental Impact Made from recycled materials, it reduces the demand for virgin wood. Sourced from trees; potential for deforestation.
Cost Higher upfront cost; lower long-term maintenance expenses. Lower initial cost; higher ongoing maintenance costs.
Longevity Longer lifespan (25-30+ years); minimal degradation. Variable lifespan; often shorter than composite.
Installation Easy installation due to consistent sizing and lightweight nature. It may require more labor-intensive installation.

Composite Decking Maintenance

Composite decking requires less maintenance than traditional wood decking, but some care is still necessary to keep it looking its best and extend its lifespan. Here are some maintenance tips for composite decking:

  • Regular Cleaning: Clean your composite deck to remove dirt, debris, and stains. Sweep the deck surface with a broom or use a leaf blower to clear away leaves and other organic matter. For a deeper clean, use a mild soap or composite deck cleaner mixed with water and scrub the surface with a soft-bristle brush. Rinse thoroughly with water.
  • Address Stains Promptly: If any stains occur, such as food spills or grease marks, clean them up as soon as possible. Use a mild household cleaner or a composite deck cleaner recommended by the manufacturer. Avoid using harsh chemicals, bleach, or abrasive cleaners, as they can potentially damage the surface of the composite decking.
  • Avoid Pressure Washing: While composite decking is generally moisture-resistant, it’s best to avoid pressure washing as the high-pressure water spray can damage the surface or strip away protective coatings. Use a low-pressure setting and keep the nozzle at least 12 inches from the deck surface if necessary.
  • Prevent Mold and Mildew: Composite decking is resistant to mold and mildew but can still develop in damp or shaded areas. Ensure proper airflow and sunlight exposure to the deck to prevent mold and mildew growth. Trim nearby vegetation to allow for better air circulation. If mold or mildew does appear, use a composite deck cleaner designed to remove these growths.
  • Prevent Scratches and Scuffs: While composite decking is durable, it can still be susceptible to scratches and scuffs. Place protective mats or pads under outdoor furniture legs to prevent direct contact with the deck surface. Avoid dragging heavy or sharp objects across the deck. If scratches occur, lightly sand the affected area with fine-grit sandpaper to minimize their appearance.
  • Inspect for Damage: Regularly inspect your composite deck for any signs of damage, such as loose boards, popped fasteners, or structural issues. Replace any damaged or deteriorated boards promptly to maintain the deck’s integrity.
  • Avoid Heat Buildup: Composite decking can become hot under direct sunlight, so placing rugs or mats in high-traffic areas is advisable to minimize heat buildup. You can also consider selecting lighter-colored decking materials that reflect more sunlight.

Sustainable Practices and End-of-Life Considerations

Sustainable practices and end-of-life considerations are increasingly vital aspects of composite decking as they address the environmental impact of these materials. Here’s how composite decking measures up in terms of sustainability:

Sustainable Manufacturing

  • Composite decking can be crafted using recycled materials like plastic bags and wood scraps, reducing the demand for virgin resources and diverting waste from landfills.

Reduced Deforestation

  • Using recycled wood fibers, composite decking helps conserve forests and reduces the need to cut down trees for decking materials.

Longevity and Reduced Replacement

  • The extended lifespan of composite decking means fewer replacements over time, reducing waste and the consumption of new materials.

Recycling Options

  • Some composite decking manufacturers offer recycling programs, allowing old or worn-out decking to be recycled and repurposed.

End-of-Life Considerations

  • When composite decks end their life, some can be recycled to create new decking materials or other products.
  • However, not all composites are easily recyclable due to their composition, making separation and processing challenging.


  • Combining wood fibers and plastics in composite decking can make recycling complex.
  • Landfills remain an option for disposing of composite materials that aren’t recyclable.


What Are The Common Problems With Composite Decking?

Common problems with composite decking include color fading, mold and mildew growth, scratching, and warping due to temperature fluctuations.

Can You Put A Grill On Composite Decking?

Yes, you can place a grill on composite decking, but a protective grill mat or pad is recommended to prevent heat damage and stains.

Can You Power Wash Composite Decking?

Yes, you can power wash composite decking, but using a low-pressure setting and keeping the nozzle at a safe distance to avoid damaging the surface is essential.

Which Is Better, TimberTech Or Trex?

TimberTech and Trex are reputable composite decking brands, with TimberTech often lauded for its realistic wood appearance and premium options. Trex is known for its durability and extensive color choices; the better choice depends on your preferences and needs.

What Is The Number 1 Composite Decking?

There isn’t a definitive “number 1” composite decking brand, as preferences vary; popular options include Trex, TimberTech, and Fiberon.


Understanding the factors affecting composite decking lifespan is crucial for making informed outdoor space decisions. These include material quality, climate, installation techniques, and maintenance practices. Sustainable practices and end-of-life considerations ensure a more environmentally responsible approach. Composite decking balances aesthetics and durability, creating long-lasting, enjoyable outdoor spaces.

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Monique Valeris

Monique Valeris is a prominent house editor with a keen eye for design and a passion for creating warm and stylish interiors. With a wealth of experience and a fresh perspective, she blends contemporary trends with timeless elements to create aesthetically pleasing and functional spaces. Valeris's editorial contributions extend beyond the printed page, engaging with her audience through various platforms to share insights and tips. Her ability to effortlessly blend different design styles and her dedication to promoting inclusivity within home aesthetics set her apart as a leader in the field.

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