Composite decking is a type of decking material that is made up of a combination of wood and plastic. The specific ingredients and ratio of wood to plastic can vary from brand to brand. The wood particles used in composite decking can be sawdust, wood chips, or wood fiber pieces, while the plastic components can be either virgin or recycled plastic materials. Composite decking is considered a more environmentally friendly product for deck building because of the use of recycled or recovered materials in the manufacturing process.

There are two main processes for creating composite decking: extrusion and compression molding. Extrusion is a forming process in which the raw materials are mixed and forced through an opening to produce a product that maintains a relatively consistent size and shape. Compression molding takes the combined molten materials and places them on a wood grain mold and then compresses them under extreme heat and pressure, which creates a physical bond.

Composite decking is heavier than traditional wood boards and is not to be used as structural material. It lasts longer than natural wood and does not require sanding, staining, and sealing every couple of years to stay in good shape. Typical maintenance for composite decking consists of removing debris with a broom or leaf blower and spot cleaning with soapy water and a nylon bristle brush. Composite decking is also resistant to insects, rot, and decay and is less prone to splintering.

In summary, composite decking is made of a blend of wood, plastic, and additives, and the specific ingredients and ratio of wood to plastic can vary from brand to brand. Composite decking is considered a more environmentally friendly product for deck building, and there are two main processes for creating it: extrusion and compression molding. Composite decking is heavier than traditional wood boards, lasts longer, and requires less maintenance.