Profile: Alexander Windows Ltd. is a manufacturer of uPVC windows and door products. We offer door types like uPVC stable doors, composite doors, inline sliding patio doors and bi-fold patio doors. Our uPVC vertical sliding window has design features that incorporates modern low line beads, enhanced weather protection and inward opening sashes that allow easy cleaning. Our uPVC front doors are supplied with a minimum of six-point locking and comprising tempered steel hooks, roller cams & dead bolts. Our anti-pick/anti-drill lock barrels give additional support. The frames of our uPVC front doors are reinforced with galvanized steel and our panels have double-reinforced cores as standard.