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Picture of a living room with huge glass windows overlooking the garden


Gainer Windows & Doors has been one of the most trusted exterior home remodelling companies in the Sudbury area for more than 30 years. We are a family-owned and operated business that values reliability, quality, and affordable pricing. With over three decades of experience in the industry, we understand the needs and demands of the residents of Sudbury and focus on providing them with superior products. 


Relying on our experience and reputation, homeowners often turn to us for home renovation needs. Whether they need to install a new windows or doors, they can expect quality products and workmanship from our experienced and trained exterior specialists. We also supply products to distributors at wholesale prices. The brands we trust to supply our customers with premium quality products include Dayside and Entryguard Doors.

If you want a new, quality window or door, come to us. We are the exclusive dealer for Dayside brand, a premier manufacturer in Canada. The products we carry meet the country’s efficiency and building standards.

Garden doors opening in the living room


As a well-established company, we have received the Sudbury Star’s Consumer Choice Award for Best Window Dealer. When it comes to our exterior services, we give our customers the excellent results they deserve.

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