What is the Difference between Capped Polymer and Capped Composite Decking?

The primary difference between capped polymer and capped composite decking lies in their material composition, performance under temperature extremes, and moisture resistance.

Material Composition

• Capped Polymer: This is a 100% synthetic product featuring an all-PVC (polyvinyl chloride) core wrapped in a protective polymer shell.
• Capped Composite: This material blends recycled wood fibers with plastic resins to create a board that more closely mimics the look and feel of natural timber.

Performance and Durability

1. Moisture Resistance: Capped polymer is entirely waterproof, making it ideal for pool surrounds. Capped composite has a wood-plastic core that can wick moisture if the outer cap is damaged.
2. Heat Retention: Capped polymer generally stays cooler underfoot during intense summer sun compared to composite, which tends to absorb more heat.
3. Maintenance and Longevity: While both are low-maintenance materials that eliminate the need for sanding and staining, capped polymer typically offers superior scratch and stain resistance. It also often carries longer warranties, ranging from 25 years to a lifetime, while composite warranties usually span 25 to 30 years.
4. Cost: Capped composite is generally more budget-friendly upfront ($6–$12 per sq. ft.), whereas capped polymer has a higher initial price point ($8–$15 per sq. ft.) but may offer better long-term value through increased durability.

• Capped Polymer Decking vs Composite: Nebraska Comparison Guide