Choosing Northern Performance Windows in Orillia to upgrade key exterior features of your home is a wise investment. Our industry leading windows, doors and siding create beautiful architectural enhancements, designed to increase pride of ownership, energy efficiency and peace of mind while adding significant value to your property. Since 1991, Northern Performance Windows has been a premier provider of quality products and installation to homeowners, custom builders and the renovation industry. We are dedicated to reliable customer service and our entire staff is committed to meeting your absolute satisfaction with every job we perform. Transform your largest investment into the home of your dreams. For honest, reliable service and quality products choose the proven professionals.