The Duration Poly-Ash Sub-Sill is a premium, high-performance solution designed to provide a durable and moisture-resistant foundation for windows and doors. Constructed from advanced poly-ash material, this sub-sill resists rotting, warping, and insect damage, ensuring a long-lasting and low-maintenance solution in any environment. With its sleek, paint- and stain-ready surface, the sub-sill seamlessly integrates into your architectural design, whether you're working on a modern build or a historic renovation. Engineered for both aesthetics and functionality, the Duration Poly-Ash Sub-Sill provides essential water management while enhancing the overall appearance of windows and doors.