Additional Details ------------------------------ Package quantity: 1 Warranty: 20 Year Limited Warranty. NextStone™ products come with a 20 year warranty against blistering, peeling, corrosion, rust, rot, delamination, flaking or excessive fading. Once NextStone™ products have been correctly installed they are waterproof and durable; we are confident in the quality of our product and offer a 20 Year Limited Warranty.