Composite Door Sills are simply the best sills on the market. Which uses a patented design of all synthetic components that eliminates the worries of wood substrate sills. The sills provides modularity within components, allowing you to upgrade your system as your needs change. Built to last, the advanced all-composite substrate and streamlined synthetic cap mean no rotting, warping, or deterioration over time. Screw covers keep debris out for easy adjustment anytime, and prevent exposure to unsightly rusted screws.

An American Standard WPC (Wood Plastic Composite) door threshold is a type of door sill designed to provide a transition between different flooring types while also serving as a barrier against water, dust, and drafts.