Graeme J. Porter is committed to providing its customers with only the highest quality windows and doors. We source our products from trusted partners, such as Griffin Windows and Duraflex, who are leaders in energy performance. Our doors are supplied by Door-Stop International, which enables us to offer our customers the best selection and quality at competitive prices. When it comes to aluminium doors and windows, our customers often choose Monarch and Sapa Building Systems, which offer Dual Frame high-performance systems.