Commercial Garage Door and Loading Dock Service in Denver
Rolling steel, high speed doors, dock equipment, gates and access control for warehouses, distribution centers, storefronts and industrial sites across the Front Range. Three generations in the trade, working directly with general contractors, property managers and facility teams.
Talk to a Commercial Tech
Tell us the site, the opening and what it is doing. We will come back with a realistic scope and schedule.
✓ Fire Door Drop Testing Documented
✓ GC & Facility Team Coordination
✓ Planned Maintenance Agreements
Every Opening on a Commercial Building
From a single rolling door on a storefront to a full dock package on a new distribution center. We handle the door, the dock, the operator and the controls, so you are not coordinating three vendors across one opening.
Built for Contractors and Facility Teams
The people who call us are not browsing. They have a schedule to hold, a building to secure, or a dock that has to run Monday morning.
General Contractors
We take off the drawings, confirm rough opening and backroom conditions before the slab goes down, and coordinate with the electrician on power and controls. Early involvement is how openings end up right the first time.
Property & Facility Managers
One number for every opening across a portfolio, planned maintenance that keeps fire door documentation current, and repair quotes written so you can actually get them approved.
Industrial & Public Sector
Warehouses, distribution centers, steel buildings, shops and municipal facilities. Including work on state and agency sites where the paperwork matters as much as the install.
A Door Specialist, Not a Dispatcher
Third Gen is a family owned company founded in Golden in 2015, built on three generations of hands on experience in the trade. Owner Sean Rogers learned the work starting at sixteen alongside his grandfather and uncle, and that background shows up in the diagnosis rather than the sales pitch.
With over 21 years of field experience, we install and service commercial doors, docks and access systems across the Denver metro and the Front Range. Steel buildings with vertical lift openings, multi door distribution facilities, storefront security grilles, and dock packages that have to be running before the first truck backs in.
The crews are our own. When you call, you get the people who will be on site, not a call center routing the job to whoever is available.
What Our Customers Say
Quality and Craftsmanship on Every Job
Steel building openings, multi door commercial installs and dock work across the Front Range.
Sean Rogers
Owner
Sean leads Third Gen with hands on experience that started at sixteen, working alongside his grandfather and uncle. Three generations later, that same standard guides every commercial job we take.
Service Across the Metro and Beyond
Our service radius covers the Denver metro, the northern and southern Front Range corridors, and mountain job sites. Explore our dedicated service areas below.
We Install and Service Every Major Brand
Residential and Architectural Doors
We continue to build custom wood, full view glass and modern flush doors for builders and architects on custom homes, and we handle residential repair and installation for existing customers across the metro.
Commercial Door FAQ
For anything not covered here, call us at (720) 697-0418.
Do you handle emergency commercial door repair?
Yes. A door stuck open is a security problem and a door stuck shut stops shipping, so commercial breakdowns move to the front of the schedule. Call (720) 697-0418 and we will give you a realistic arrival window rather than an optimistic one.
Do you work directly with general contractors on new construction?
Yes. We take off drawings, confirm rough opening and backroom conditions before the slab goes down, coordinate with the electrician on power and controls, and schedule installation around the rest of the trades. Getting involved early is how openings end up right the first time.
What commercial door types do you install and service?
Rolling steel service doors, fire rated rolling doors and counter shutters, high speed fabric and rigid doors, commercial sectional doors, security grilles, and specialty openings. On the dock side, levelers, seals, shelters, bumpers and restraints. We also handle gate operators and access control.
Do you offer planned maintenance agreements?
Yes. Scheduled inspection and service on a cycle that fits your door count and cycle rate, with fire door drop testing documented for your records. Facilities that run planned maintenance replace far fewer doors on an emergency basis.
Can you service fire rated doors and provide drop test documentation?
Yes. Fire rated rolling doors require periodic drop testing and reset, and we document the results so your inspection file is complete when the fire marshal or insurance carrier asks for it.
Do you still take residential work?
Our focus is commercial door, dock and access work. We continue to handle custom architectural and full view glass doors for builders and architects on residential projects.
Door Down, or a Project to Bid?
Emergency repair, a dock package, a multi door install, or a takeoff for a job you are pricing. Call or send the details and we will come back with a real scope and schedule.
