LAB Windows is a trusted name in Ontario's window and door industry. Our technicians are fully trained to ensure flawless installation and will take the hassle out of every window or door replacement project. Our windows are ENERGY STAR-certified to keep your home energy-efficient and comfortable year-round and help you lower your energy costs and carbon footprint. Choose LAB Windows for dependable service and products that stand the test of time. Whether you need custom styles, enhanced security features, or superior noise reduction, we've got the perfect solution for your home. more... See more text