Saint-Gobain supplies entry, storm and patio doors primarily for use in residential homes, condos and apartment complexes. While most people see the aesthetics of the door as its primary attribute, it’s often what’s inside the door – what it’s made from, how it’s made – that leads to long-lasting beauty and functionality. Properly sealed, quality doors can ensure minimal energy loss and yield savings on heating and cooling bills, and repel moisture and insects.