At its Riverside Drive production facility in Lakeside, Flashing Warehouse manufactures TPO and PVC single-ply roofing accessories for commercial contractors, stocking pipe sleeves, penetration cones, clad metal drip edge, scuppers, and gravity vents for walk-in pickup. The product line serves the same single-ply membrane systems that Ford Roofing installs across Lakeside's commercial flat-roof inventory, with standard items in stock and custom fabrications produced on a per-order basis. Ownership brings over 35 years of roofing-industry manufacturing experience to the production floor, and the fabrication staff specializes exclusively in single-ply TPO and PVC product construction. The in-stock catalog includes 1-inch through 5-inch linear pipe sleeves in closed and split configurations, small through large penetration cones, 2x3 through 4x6 scuppers in center-left-right outlet positions, and TPO/PVC-clad stainless-steel Thunderbird Products retrofit roof drains. Building-envelope integrity depends on flashing and drip-edge coordination at every roofline penetration, and the company's clad metal products complement the replacement glass and frame sealing that Window Solutions handles on Riverside Drive. The highest-specification assemblies involve TPO/PVC-clad stainless-steel bottom-outlet roof drains with overflow capacity, fabricated to match exact membrane thickness and attachment method for manufacturer-warranted single-ply roof systems.