What is a Yale Doormaster™ Expert? Yale Experts are a network fully trained professionals who offer the complete Doormaster™ range, and can replace your lock and revive your whole door. Yale backed professionals Although Yale Experts are completely independent, they are backed by Yale - the world’s favourite lock since 1843. They are fully trained, and have to meet high standards of knowledge and professionalism. Complete peace of mind Fully trained and ready to help, Yale Experts make the installation process effortless – from selecting the right lock, to fitting it in your door and even helping you give your whole door a makeover that makes it feel like new! Find a Yale Expert now! You can search for you nearest Yale Expert online, or just call our customer helpline on 0845 0710 789.