The presence of water in composite material decreases mechanical properties and durability, including performance during freeze/thaw cycling, dimensional stability, and warping. In addition, the higher the water content the higher the risk of internal decay due to microbiological activity. Sensitivity to water depends on the material formulation.
A composite decking has been introduced that has outperformed other leading extruded polyethylene composites in independent water absorption rate testing*. GeoDeck's™ is a patented formula which contains no wood residue or sawdust and further distinguishes it as the best overall composite decking solution in the industry. It has been developed by Green Bay Decking, LLC. GeoDeck offers best-in-class ratings for mechanical strength, stiffness, joist and stair tread span, density, weight-per-foot, and now water absorption rates. Unlike most other composite products, GeoDeck's patented formula contains no wood fillers, but includes rapidly renewable rice hulls, which are naturally more resistant to internal microbial activity and water absorption than wood and wood by-products.