Who We Are


Hi I am Mae Sullivan Owner of Dia Construction.

Dia Construction is best known for a high quality product and a wide selection of garage doors. Its unbeatable product warranties and its “Dia Construction Expert” network, assure all Dia Construction customers that they can count on qualified garage door experts in the sales, installation and repair of garage doors.

Dia Construction, a quality leader!
Dia Construction produces superior quality garage doors thanks to its two fully-automated garage door plants featuring digital control technology. Both plants are located in Canada (St-Georges, QC and Barrie, ON).

Dia Construction has grown steadily and built up a solid international reputation in the industry as a manufacturer of high quality, reliable garage doors. Quality goes far beyond our products. It extends to each and every one of our employees. No matter what the context, you will be surprised by service that exceeds your expectations.

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