Diamond

Commercial steel Doors & Frames built to last , Designed to the highest standards

Crafted with precision and built to last, our products are designed to meet the highest industry standards, providing reliable performance and enhanced visual appeal for residential and commercial applications alike. Explore our innovative solutions to elevate your entryways with style and strength.

Diamond Manufacturing is one of Canada's leading custom steel door and frame manufacturer.

With our state-of-the-art machinery, Diamond’s unmatched innovation allows our clients to maximize their budgets while ensuring uncompromising quality and value.

100% Manufactured in
Canada
Expedite manufacture and quick shipping facilities nationwide 
Specializes in Custom steel doors and Frames
The only facility in Canada equipped with the most advanced  cutting-edge machinery in the industry

Diamond Series

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Unmatched Strength and Durability

Built to deliver superior performance and withstand intense use.
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Exceptional Quality

Features a flawless surface free of weld marks for a clean, professional appearance.
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Engineered for Extreme Conditions

Designed to perform reliably under the most demanding environments.

Quality door openings are backed
by sturdy framework.

Masonry (M)

Top-grade steel door frames for single-piece or welded Installation

Thermally Broken (TB)

Steel Frame Designed for Pair doors

Flush Frame (FF)

Casing-Ready Flush-Fit Steel Door Frames

Drywall (DW)

Three-part knockdown (KD) drywall frames designed for 1-3/4” doors.

Cased Open (CO)

Top-grade steel door frames for single-piece or welded Installation

Double Egress (DE)

Steel Frame Designed for Pair doors

Resource & Support

Innovation meets quality

Choose Diamond Doors for unparalleled reliability and design excellence.