BLACKSTAR ALUMINUM IS RECOGNIZED AS ONE OF HOMESTARS’ BEST OF 2022 - 2021 - 2020 - 2019 - 2018 If you are installing new rain gutters or protecting existing rain gutters, contact Blackstar Aluminum - The Best Installer for Your Eavestrough in Toronto (GTA) Region. Blackstar Aluminum will help you make the right choices with your residential or commercial property. Blackstar Aluminum replaces/installs 5 and 6 inches residential and commercial eavestroughs in Toronto (GTA). Our specialists can upgrade your eavestroughs with T-Rex or DoublePro, a Continuous Hanger System. Through its unique patented design, T-Rex creates a unified structure that resists bending and twisting. DoublePro is a dual-action gutter protection system.