Commercial Garage Doors

Hörmann commercial doors are built to last. They are available in a wide range of styles, sizes and design options. Sophisticated engineering and state-of-the-art manufacturing provide the basis for durable, reliable and long-lasting quality products.

Hörmann is one of the world’s leading door manufacturers and a global leader in today’s building components industry. The family’s name has become synonymous to brand quality products covering a wide range of doors in residential and commercial applications. Constant innovation, quality assurance and close proximity to customers are the keys to the company’s permanent growth and lasting success. Operated by the third and fourth generation, the grandson and great grandsons of the company’s founder, Hörmann currently serves customers in more than 30 countries with a multitude of quality products.

The Hörmann range of residential and commercial doors along with the openers are specially designed and developed to meet the requirements of the North American market. And we do it without compromising the Hörmann standard for quality and design offering superior protection and safety.

hormann garage doors in delaware

Commercial Models Available Seen Below

  • H-225P/H-224P
  • H-325S/H-324S
  • H-425U
  • H-720A




H-225P and H-224P doors come in two choices of material: 25 gauge (.019” min.) or 24 gauge (.022” min.), hot-dipped galvanized steel. No matter which door suits your needs best, all H-225P and H-224P doors are manufactured to the highest quality standards and come with FingerGuard™ pinch-resistant section joints as standard.

Energy-efficient vinyl back
The optional full cavity HCFC-free polystyrene insulation with vinyl back cover provides enhanced energy efficiency R value 7.4 and sound-dampening qualities. This improves overall energy savings while contributing to a quiet working environment.



H-325S and H-324S doors are available in two choices of material: 25 gauge (0.19” min) or 24 gauge (0.22” min) with an R-value of 8.9., 3-layer bonded construction with a hot-dipped galvanized, finished steel front and back enclosing a HCFC-free polystyrene core. No matter which door suits your needs best, all H-325S and H-324S doors are manufactured to the highest quality standards and come with FingerGuard™ pinch-resistant section joints as standard.

Energy-efficient polystyrene core
The H-325S & H-324S series of doors offers enhanced energy efficiency and sound-dampening qualities. The polystyrene insulation fills the top of the door channel for maximum insulation. With 2” thick sections, both series gives you an R value of 8.9.



Hörmann H-425U offers 1¾” thick two sided steel sections and  100% CFC-free polyurethane foam core insulation for maximum protection against the elements. (R-value 16.1)  Manufactured to the highest quality standards in the industry, all H-425U doors come with Hörmann exclusive FingerGuard™ pinch resistant section joints.

Highly energy-efficient polyurethane foam core
Environmentally friendly polyurethane foam core is injected between 25 gauge galvanized steel sheets front and back. This provides maximum insulation for substantial energy savings and ultimate panel stability for extremely quiet door operation.



Hörmann H-720A adds a modern look and maximizes the natural light in any building.  The 1¾” thick high quality anodized aluminum glazing frames can be fitted with a wide range of glazing or panel filler options to achieve the desired look for your building.

All H-720A doors come with Hörmann’s exclusive FingerGuard™ pinch resistant section joints. This uniquely designed section joint creates a deep tongue and groove fit for a tight seal between door sections.

Comprehensive Commercial Overhead Door Services by Diamond State Door

fbsnap-delaware-commercial-hormann-doorsOnce you’ve installed the perfect industrial overhead door for your business, you really don’t want to worry about technical difficulties or accidental damage slowing you down. While our overhead doors are the most reliable in the business, we back up our product with a comprehensive array of support services, including:

  • Our renowned Preventative Maintenance Program.
  • Thoroughly-trained, expert technicians who are available at a moment’s notice.
  • We’re fully-insured, so you can enjoy a worry-free installation and repair process.

Best Commercial Overhead Doors in Wilmington, Delaware

The commercial overhead doors and products we install and repair are performance and safety-tested; if the industrial doors you use were installed by Diamond State Door, you can rest assured they are durable, reliable, and backed by our top notch service and repair program. We offer a comprehensive selection of industrial and commercial doors, products and accessories.

Maintenance Programs

Exposure to the elements and rigorous daily demands of business can take a toll on overhead door systems. Don’t let your business be shut down by unexpected door or opener malfunctions! We work with you to create a preventative maintenance program to keep you operating smoothly and save you thousands of dollars in major repair costs. Call us today and ask for a FREE Consultation for your preventive maintenance program.