Sydney Glass Installations - We Provide Glass Repairs & Replacements Accross Sydney! Try Us Out With A Free Quote Today! SGI is an Australian owned and operated business, run by a small team of glaziers with over 10 years’ experience. We take pride in our work, ensuring our customers hold a 360-degree satisfaction, providing high quality workmanship. We specialise in shower screens, splashbacks, balustrades, glass pool fencing, mirrors, windows and all glass replacements.