Made using molds cast from real stone, Foundry vinyl stacked stone siding offers the varied color tones and textured grout lines of hand-selected North Carolina quarried stone. Ceramic microspheres are incorporated into the material to impart a subtle grittiness and give the Product a more authentic feel. Unlike actual stone and stone veneer siding, Foundry limestone is durable and efficient to install. Plus, it's moisture-resistant, so it can be applied all the way to ground. Year after year, Foundry vinyl stone 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.