Building a deck is a significant investment that enhances your home’s value and provides a space for relaxation and entertainment. While traditional wood has long been the standard for outdoor construction, many homeowners are now turning to synthetic decking materials. These products, often categorized as plastic lumber or composite decking, provide a long-lasting solution that resists the elements better than organic wood.
Synthetic decking is engineered to mimic the look of natural wood while eliminating its most common drawbacks. This guide explores the different types of synthetic materials available, their benefits, and how to choose the right product for your specific outdoor project. By understanding the technology behind these materials, you can make an informed decision that ensures your deck remains beautiful for decades.
Understanding Synthetic Decking and Plastic Lumber
Synthetic decking generally falls into two main categories: composite and cellular PVC. While they may look similar from a distance, their composition and performance characteristics differ significantly. Understanding these differences is the first step in selecting the right material for your home.
Composite Decking
Composite decking is made from a blend of wood fibers and recycled plastics. This mixture is heated and extruded into boards that resemble traditional lumber. Most modern composites are “capped,” meaning they have a hard outer shell that provides extra protection against scratches, stains, and fading. The wood fibers provide strength and rigidity, while the plastic protects the wood from moisture.
Cellular PVC
Cellular PVC (polyvinyl chloride) contains no wood fibers at all. It is made entirely of high-strength plastic. Because it lacks organic material, it is virtually impervious to moisture, rot, and insects. PVC decking is often lighter than composite and can be more resistant to mold and mildew growth in very damp environments. It is a popular choice for docks, pool surrounds, and coastal areas.
Why Choose Synthetic Materials Over Wood?
The primary reason homeowners choose synthetic decking is the reduced maintenance requirement. Traditional wood decks require regular sanding, staining, and sealing to prevent rot and UV damage. Synthetic boards, however, do not require these recurring treatments.
- Durability: Synthetic materials are designed to withstand harsh weather conditions, including heavy rain, snow, and intense sunlight.
- Safety: Unlike wood, synthetic decking does not splinter. This makes it a safer surface for children and pets to walk on with bare feet.
- Longevity: Most synthetic decking products come with warranties ranging from 25 to 50 years, far outlasting the typical lifespan of a pressure-treated wood deck.
- Insect Resistance: Termites and carpenter ants are attracted to wood, but they have no interest in plastic or composite materials.
Key Features to Look for When Purchasing
Not all synthetic decking is created equal. When you are ready to purchase, there are several specific features you should evaluate to ensure you are getting a premium product. Look for these indicators of quality and performance.
Capping Technology
Ensure the boards are capped on at least three sides, though four-sided capping offers the best protection. The cap is the protective layer that prevents moisture from reaching the core of the board. High-quality caps also include UV inhibitors to prevent the color from fading over years of sun exposure.
Slip Resistance
Outdoor surfaces can become slippery when wet. Check the slip resistance rating of the decking material. Many premium synthetic boards feature deep wood-grain embossing that provides better traction than smooth wood, making them safer for use around pools or in rainy climates.
Heat Dissipation
Darker synthetic boards can absorb significant heat in direct sunlight. If your deck will be in an unshaded area, look for products that feature heat-dissipating technology. Some manufacturers use special pigments in the cap layer that reflect sunlight, keeping the surface cooler to the touch.
Sustainability and Environmental Impact
Many homeowners choose synthetic decking because of its environmental benefits. High-quality plastic lumber is often made from recycled materials, such as plastic bags, jugs, and reclaimed wood scraps. This diverts thousands of tons of waste from landfills every year.
Furthermore, because synthetic decks do not require chemical stains or sealants, you avoid introducing harmful toxins into your backyard environment. When researching brands, look for those that provide transparency regarding their recycled content and manufacturing processes.
Installation Considerations for Synthetic Decks
Installing synthetic decking is similar to installing wood, but there are a few important differences to keep in mind. Following the manufacturer’s installation guide is crucial for maintaining your warranty and ensuring the structural integrity of the deck.
Hidden Fasteners
One of the aesthetic advantages of synthetic decking is the ability to use hidden fastener systems. These clips fit into grooves on the sides of the boards, securing them to the joists without visible screws on the surface. This creates a clean, high-end look and eliminates the risk of screws backing out over time.
Expansion and Contraction
Plastic and composite materials expand and contract with temperature changes more than wood does. It is vital to leave the proper gap between the ends of the boards to allow for this movement. Professional installers use specific spacing tools to ensure the deck remains stable throughout the seasons.
Joist Spacing
Synthetic boards are generally less rigid than natural wood. For a residential deck, joists are typically spaced 16 inches apart on center. However, if you are installing the decking at a 45-degree angle, you may need to reduce the joist spacing to 12 inches to prevent the boards from feeling “bouncy” when walked upon.
Maintenance Tips for a Long-Lasting Deck
While synthetic decking is low-maintenance, it is not “no-maintenance.” A small amount of care will keep the surface looking new for decades. Regular cleaning prevents the buildup of dirt and pollen that can lead to surface mold.
For general cleaning, use a soft-bristle brush and warm, soapy water. Avoid using harsh chemicals or abrasive scrubbers that could damage the protective cap. If you use a pressure washer, keep it at a low setting (usually under 1,500 PSI) and maintain a safe distance from the boards to avoid etching the surface.
Conclusion
Choosing synthetic decking or plastic lumber is a smart way to create a beautiful, durable outdoor space that requires minimal effort to maintain. By selecting high-quality capped materials and following proper installation techniques, you can enjoy an outdoor oasis that stands the test of time. Whether you prefer the classic look of oak or the modern appeal of gray tones, there is a synthetic option to match your home’s aesthetic.
To learn more about improving your outdoor living area, consider exploring our other guides on patio furniture selection and outdoor lighting solutions to complete your backyard transformation.