Astral Systems We design and construct glazed roofing solutions, fixed or retractable. Limited only by your imagination Enquire Now Welcome To Astral Systems – Your Glazed Roofing Specialists! For over 40 years, Astral Systems have been providing glazed roofing solutions to both residential and commercial clients throughout Melbourne, Rural Victoria and Australia Wide. Astral Systems are the specialists in glazed roofing, retractable roofing, conservatories and various other types bespoke