Sentry Windows & Doors is a local, family-owned and -operated home improvement company serving homeowners throughout Southwestern Ontario. Built on a culture of excellence and integrity, our company is committed to providing our customers with durable, high-performing products, expert installation, and friendly customer care. When you partner with Sentry, you can expect a home improvement experience that is truly one of a kind. We know that no two homes are alike — nor are any two homeowners — which is why we take the time to get to know you and work with you to evaluate your home and find the best solutions to your specific needs. And, with our comprehensive warranty protection, we’ll be looking out for you and your home long after your project is completed.