Capped Composite (Cap Stock)
Composite decking wrapped in a protective polymer shell that resists staining, fading, scratching, and mold growth far better than uncapped first-generation composites.
In Detail
Capped composite decking features a co-extruded polymer cap bonded permanently to all four sides of the core. The cap provides UV resistance, stain resistance, and superior color retention compared to uncapped composites. Major brands: Trex Transcend/Enhance, TimberTech AZEK/PRO, Fiberon Horizon. Cap thickness varies by price point — premium lines have thicker, more durable caps.