90° Inside Corner Aluminum Flashing - 10' - Set of 4

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90° Inside Corner Metal Flashing is designed to finish and protect interior building corners with a clean, durable appearance. The finished face is positioned on the inside of the corner, making it ideal for applications where the visible surface is on the interior side of the joint. Available in standard dimensions of 1″×1″, 2″×2″, 3″×3″, and 4″×4″, this L-shaped flashing provides long-lasting protection against moisture intrusion and delivers a sharp, uniform interior corner detail. Commonly used in roofing, siding, and cladding assemblies, inside corner flashing improves water management while ensuring a smooth, professional finish. Features include: 90-degree L-profile for precise interior corner coverage Finished interior face for a clean, visible edge Available in multiple leg sizes: 1″×1″, 2″×2″, 3″×3″, 4″×4″ Protects vulnerable interior joints from water infiltration and weather exposure Suitable for roofing, siding, and façade installations .040" Thickness This inside corner flashing is an essential component for achieving a watertight seal and a polished appearance at interior junctions in both residential and commercial projects. Show more