Diamond State Door


Delaware Residential & Commercial Doors, Openers, Repair Service & Installations

Call us today for garage door repair or replacement. Most times a small adjustment is all that’s needed to make your garage door last for years to come.  We fix broken springs, replace rollers, anchors, brackets, replace bent panels, re-align sensors, replace perimeter seal or bottom seal and much more. We also offer a safety inspection & tune-up services to keep your garage door opener running smoothly.


Commercial Door Services by Diamond State Door

Once 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:

Automatic ADA Doors

Rolling Steel Doors

Service Doors

Insulated Service Doors

Counter Shutters

Fire Doors (Fire Shutters)

Wind Loaded Service Doors


Sectional Doors

Security Doors

Accordion Doors

Sound Doors

Storefront Security Doors

Bi-Folding Doors

Home Security & Storm Doors

Pharmacy Doors

Security Cases

Specialty Doors


Hangar Doors

Horizontal Sliding Doors

Hydraulic Doors

High Speed/Rapid Roll Doors

Dock Equipment

Dock Levelers

Edge-of-Dock Levelers

Safety Products & Accessories

Door Motor/Operators

Preventative Maintenance Programs


Keeping your door equipment in working order can save you trouble and downtime. Our Commercial Garage Door Planned Maintenance Plans benefits include:

  • Increased Operational Efficiency
  • Extended Useful Life of Equipment
  • Reduced Likelihood of Equipment Failure
  • Decreased Costly Downtime
  • Decreased Long-Term Repair Expense
  • Priority Scheduling for Service
  • 24-hour Service and Repair


All Types Door Hardware

Loading Dock Seal Shelter

Hollow Metal & Steel Doors

Fire Doors & Frames

Wood Architectural Doors

Panic Devices Installed

Push Plates & Wave Plates

Automatic Gate Openers

Custom Store Fronts

Aluminum Door Hardware

Mall Sliding Glass Doors

Patio Door Tracks & Rollers

Here are just a few of the door products and services we offer:

 As you already know, safety is a major issue when it comes to your home or business. That’s why we set high standards for proper repair and installation, to keep you and visitors to your building safe. When you hire us, you get the peace of mind that you deserve. But that’s not all we’re known for.

You Have an Important Decision to Make.

You have two choices. You can hire a less experienced or uninsured company, and risk your valuable time and money. Or you can hire an insured door repair company known for great work. So make the right decision. Give us a call now at 302-743-4667 for a free quote on our services or for more info. Also use the easy service request form at top for your free quote.


Handicap Openers (ADA)

Automatic Sliding Doors

Automatic Swinging Doors

Residential Garage Doors

Commercial Garage Doors

Glass Doors & Replacements

Storefronts Manual/Automatic

Mall Security Gates

Overhead Sectional & Rollup

All Types of Door Closers

Weather Stripping

Emergency Board Up Services