We Never Leave A Door Open

full view aluminum overhead doors
commercial overhead garage doors
commercial overhead doors
commercial overhead doors

Overhead Door Service & Maintenance

You need doors that work – it’s as simple as that. This single truth guides our entire business, and we do everything we can to make it happen for you. We maintain a high inventory of all the parts and materials necessary for maintenance service and repair, and our staff is fully trained and licensed for every process involved, ensuring you have minimal downtime. So, whether it’s a scheduled 6-month inspection or a midnight emergency, we’re always here to help.

We offer our customers quality Canadian service for overhead doors and loading dock levelers, regardless of the manufacturer or if we provided the original installation.

Ask about our industry-leading maintenance agreements that keep your doors operating at peak efficiency, catching potential issues before they become significant problems.

We only use your information to contact you about your inquiry. We won’t spam you or share your info with third parties.

Call 1-866-968-3398 For 24-Hour Emergency Door Service

We know how important it is to keep your operations moving, so we’re committed to quick action when you need assistance. We arrive for repair requests on the same day with fully stocked vehicles, so our professional technicians can fix virtually any issue right there on the spot.

Our GNB Doors Give A Sh!t Guarantee


1 Hour Response to Calls

All customers will receive a call back from a GNB team member within 1 hour of your initial call to us.

door illustration

We Never Leave A Door Open

We will never leave your operation open and unsecured. We promise that we will get your door down before the end of the day so that you can secure your operations.

Patricia Ave Building 7, Brandon, MB R7A 5Y4, Canada
702 18 Ave Bay 15, Nisku, AB T9E 7V8, Canada
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Patricia Ave Building 7, Brandon, MB R7A 5Y4, Canada

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Communities We Serve

GNB Doors provides outstanding commercial overhead door sales, installation, and service across communities in Alberta, Saskatchewan, Manitoba, and North Western Ontario, including:

What Our Customers Say About Us

Safety First

Success Will Follow

Safety Never Comes Second

We work with heights, metal components, motors, and high-tension springs – rest assured that we take the safety of you and our crews very seriously. We have certifications and membership in several safety designations. We are proud to have licensed technicians, fully-trained staff, and all the necessary equipment to get every job done without incident.