Polywood lumber is plastic lumber made to resemble wood boards. It is commonly used for outdoor furniture and other exterior products because it resists moisture, rot, and splintering and needs little routine maintenance.
The term can be confusing: POLYWOOD® is also a brand name for outdoor furniture made from high-density polyethylene (HDPE). Similar products are sold as recycled plastic lumber, poly lumber, or HDPE lumber. Their materials and performance vary by manufacturer, so check the product specifications before buying.
What Is Polywood Lumber Made Of?
Many poly lumber products are made primarily from recycled HDPE, a plastic used in items such as milk and detergent containers. The plastic is sorted, cleaned, processed, and formed into boards or molded parts. Manufacturers may add pigments and UV stabilizers to improve color retention outdoors.
Product formulas are not all identical. Some contain recycled plastic, some may include virgin plastic, and some lumber products contain wood fibers. Check the product label or manufacturer’s information to learn what a particular board contains.
POLYWOOD® says its Genuine POLYWOOD™ lumber is made from HDPE and includes recycled plastic, with pigments and UV inhibitors blended into the material. POLYWOOD materials information
How Is Polywood Lumber Made?
The manufacturing process varies by product, but it generally includes these steps:
- Collection and sorting: Recyclable plastic is gathered and separated by type.
- Cleaning and processing: The plastic is cleaned, shredded, or turned into small pieces or pellets.
- Blending: Manufacturers may add colorants, UV stabilizers, and other ingredients.
- Forming: The material is heated and shaped into boards or molded components.
- Cooling and finishing: The product is cooled, cut to size, and prepared for sale.
Common Uses
Polywood and similar plastic lumber products are often used for:
- Patio chairs, tables, benches, and Adirondack chairs
- Park and picnic tables
- Fencing and selected decking products
- Planters and garden structures
- Marine and waterfront furniture
- Outdoor commercial seating
Use the product only for applications listed by its manufacturer. Plastic lumber is not automatically a structural substitute for wood; its load capacity, fastening method, and support spacing must suit the project.
Advantages of Polywood Lumber
Resists moisture and rot
Unlike natural wood, HDPE lumber does not absorb water in the same way. It does not rot or splinter like untreated wood, making it useful for many outdoor furniture products.
Low routine maintenance
Polywood furniture usually does not need sanding, painting, staining, or sealing. Routine cleaning with mild soap and water is often enough; follow the manufacturer’s care instructions.
Resists insects
Plastic lumber does not provide food for termites and many other wood-boring insects, though surrounding wood structures may still need protection.
Recycled content
Some products use post-consumer recycled plastic, giving that material another use. The amount and type of recycled content differ by brand, so check product-specific information.
Color and style choices
Pigments can be blended through the material, and some products are available in several colors and wood-like textures. UV stabilizers can help limit fading, but they do not guarantee that color will never change.
Limitations to Consider
Higher initial cost
Polywood furniture and lumber may cost more upfront than basic wood or plastic options. Whether it saves money over time depends on the product’s price, expected lifespan, maintenance, and warranty.
Heat and expansion
Plastic can become hot in direct sun and can expand or contract as temperatures change. Follow the installation instructions for spacing, fastening, and support. The USDA Forest Service notes that recycled plastic lumber has different thermal movement and load-bearing properties from wood, so it should not be substituted for structural wood members without appropriate specifications. USDA Forest Service guide to recycled plastic lumber
Appearance differs from real wood
A molded grain pattern can suggest the look of wood, but the color and texture are more uniform than natural lumber. It may not suit buyers who want real wood grain or the ability to sand and refinish a surface.
Recycling depends on the product and location
HDPE is recyclable, but whether a finished product can be recycled depends on its composition, additives, local collection programs, and recycling facilities. Do not assume every mixed-material product will be accepted in curbside recycling.
Polywood vs. Wood and Composite Lumber
| Material | Main characteristics | Considerations |
|---|---|---|
| Polywood / HDPE lumber | Plastic lumber, often made with recycled HDPE; resists moisture and rot | Can cost more upfront, heat in sunlight, and move with temperature changes |
| Natural wood | Real grain, can be cut and refinished, available in many species | May need sealing or painting and can be affected by moisture, insects, or decay |
| Wood-plastic composite | Combines wood fibers with plastic | Performance varies; products may need specific installation and care |
“Composite” does not always mean the same thing as poly lumber. Some composite boards contain wood fibers, while HDPE plastic lumber may be made without them. Check the product’s material description.
How to Clean Polywood Furniture
- Brush away loose dirt and debris.
- Wash the surface with mild soap and warm water using a soft cloth or sponge.
- Rinse with clean water.
- Let the furniture dry before using it.
For stubborn marks or pressure-washer use, follow the product’s specific care instructions. Avoid harsh chemicals or abrasive tools unless the manufacturer approves them.
Is Polywood Environmentally Friendly?
Recycled-plastic lumber can make use of some plastic waste and may reduce demand for virgin plastic. Its overall environmental impact still depends on how it is made, transported, maintained, and handled at the end of its life. Ask the manufacturer about recycled content and end-of-life recycling options rather than relying on broad “eco-friendly” claims.
Frequently Asked Questions
Is Polywood lumber real wood?
No. Polywood lumber is plastic lumber, usually made primarily from HDPE. It may have a wood-like texture, but it does not contain natural wood unless the manufacturer specifies that wood fibers are included.
Does Polywood fade in the sun?
UV stabilizers and pigments can help reduce fading, but color may still change over time depending on the product, color, climate, and exposure. Check the manufacturer’s warranty for details.
Can Polywood lumber be used for decking?
Some products are made for decking, but not every poly lumber board is suitable. Confirm that the specific product is rated for decking and follow its span, support, fastening, and installation requirements.
Does Polywood furniture need to be sealed?
Most HDPE outdoor furniture does not need wood sealant, paint, or stain. Follow the manufacturer’s instructions for cleaning and care.
Is POLYWOOD the same as Trex?
They are different products and brand names. POLYWOOD® is a brand of outdoor furniture made with its proprietary HDPE lumber. Trex decking products are generally wood-plastic composites; Trex Outdoor Furniture uses Genuine POLYWOOD™ lumber. Check the exact product description.
Conclusion
Polywood lumber is a low-maintenance plastic alternative to natural wood for many outdoor furniture and site-furnishing uses. It resists moisture and rot, and some products use recycled HDPE. Its upfront price, heat in direct sun, thermal movement, and structural limits are worth checking before purchase. Compare product specifications and use the material only for applications approved by its manufacturer.