Our most popular vinyl cedar shake siding, split shake is manufactured from molds made of genuine cedar, giving it a warm, authentic texture. Scores of distinct cedar molds are used to achieve a hand-split appearance with random grooves and grain. A deep texture creates a captivating contrast between light and shadow. Year after year, Foundry vinyl shake siding holds its rich color, thanks to a durable ASA cap that protects against UV rays and the elements. What's more, Foundry siding is backed by a limited lifetime warranty and provides the highest level of fire resistance and toughness to stand up to any environment.