Phenergan generic brand Spectra-Glaze Services specialise in the following range of work: Single, Double Glazed & Triple Glazed glass and glazing repairs to all type of frames. Glass supplies. Window Filming â Safety â Reflective, etc. Emergency Call Out (during our office hours) Eviction & Void properties. PVC-U, Aluminium and Composite Window and Door maintenance and servicing. PVC-U, Aluminium and Composite Window and Door locks, mechanisms, handles and hinges. Full replacement of PVC-U & Aluminium Window and Doors. Full replacement of Composite Doors. Fibre Glass Door Canopies. Glass Safety Regulation Surveys.