3 Best Window Companies in St. Catharines

“Great Northern Home Exteriors Inc. has over two decades of experience providing unparalleled sales and installation services to countless satisfied clients. The team members offer courteous customer service. The professional sales and installation teams will provide the information and guidance needed to make informed home improvement decisions and will carry out your renovations with courtesy, accuracy, and timeliness. Great Northern Home Exteriors Inc. offers several options for upgrading your windows' energy efficiency. They also maintain the Energy Star labels on your windows and doors until after your post-retrofit evaluation. They offer free in-home estimates.”

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“Permanent Siding & Windows has 50 years of experience in the field. Their windows are designed to be used individually or in pairs, secured within a shared frame. The team also installs innovative window designs that effectively enhance energy efficiency and infuse your space with natural light. Their selection contains reputable brands and is skillfully installed by experienced professionals. They are fully insured and WSIB compliant, creating a safe work environment. Permanent Siding & Windows takes pride in its organized, professional work environment. They provide estimates and financing options for new windows and siding.”

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“Mark’s Windows & Doors is owned by Mark. The company has over 25 years of experience in the field. The products are manufactured by the most trusted and respected names in the home improvement industry. Their technicians combine first-class carpentry skills with excellent communication. The crew members have extensive experience and knowledge. Their employees are dedicated, reputable, skilled tradespeople with many years of experience. They meet all Energy Star guidelines in every project. The company offers a five-year minimum warranty on all services. Mark’s Windows & Doors also offers free estimates.”

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