What are the types of extrusions used in the production of vinyl fence?

Two types of extrusion processes have typically been used in the production of all types of vinyl extruded products such as siding, window frames, pipes and fence products: Monolayer and Co-extrusion. A Fence buyer should be aware of what specs are being used by the extruder, as many fence extruders are producing fence product using a pipe specification, which has lower demands for UV stabilization and impact resistance.