Are You Licensed, Bonded, and Insured?
This isn't just a formality. A legitimate garage door company carries the proper licensing required in your state or municipality, general liability insurance, and a surety bond that protects you if they fail to complete the job or cause property damage. Ask to see proof — not just verbal assurance.
Most reputable companies will provide copies of their insurance certificates and bond documentation without hesitation.
If a company balks at this request or claims they "don't need" insurance because they're careful, walk away. Garage door work involves heavy materials, high-tension springs, and electrical components. If someone gets hurt on your property or damages your home, you could be held liable if the contractor isn't properly insured.
Pro Tip: Request copies of both the insurance certificate and bond documentation before signing any contract. Verify the coverage is current and covers the full scope of your project — expired or insufficient coverage leaves you exposed to the same risks as hiring an uninsured contractor.
How Long Have You Been in Business?
Experience matters in garage door work. A company that's been around for a decade or more has encountered the full range of installation challenges, repair scenarios, and product quirks that come with the territory.
They've survived economic downturns, built relationships with suppliers, and developed systems that keep customers satisfied enough to refer friends and family.
Ask how long the specific team or technician has been with the company, too. A 15-year-old business is less reassuring if their installer started last month. You want the people doing the actual work to have hands-on experience, not just the name on the truck.
What Industry Certifications Do You Hold?
Professional certifications signal that a company invests in training and adheres to recognized standards. The International Door Association (IDA) offers certifications for installers and technicians, and membership indicates a commitment to ongoing education and industry best practices.[2]
IDEA (International Door & Operator Industry) certifications are another good sign.
Ask whether the company follows DASMA (Door & Access Systems Manufacturers Association) standards, which outline recommended practices for residential garage door installation, including proper balance, operation, and safety compliance.[3] Companies familiar with these standards are more likely to install your door correctly the first time.
Key Certifications to Look For:
- IDA (International Door Association) Certified Installer or Technician
- IDEA (International Door & Operator Industry) Professional Certification
- DASMA (Door & Access Systems Manufacturers Association) Standards Compliance
- Manufacturer-specific training certifications for brands they install
- OSHA safety training documentation
Will You Provide a Detailed Written Estimate?
A vague verbal quote isn't worth much when the final bill arrives. Before any work begins, you should receive a written estimate that breaks down labor, materials, disposal fees, permit costs, and any other charges.
The estimate should specify the brand and model of parts or doors being installed, not just generic descriptions like "premium garage door."
Compare itemized estimates from at least three companies. If one quote is dramatically lower than the others, dig into why. They might be cutting corners on materials, skipping safety features, or planning to tack on "unforeseen" charges once they've started the job.
A detailed estimate protects both parties and sets clear expectations before anyone picks up a wrench.
What Warranty Coverage Do You Offer?
Warranties come in two flavors: manufacturer warranties on the products themselves, and workmanship warranties from the installation company. A quality garage door might carry a lifetime warranty on certain components like springs or panels, but that coverage is worthless if the installer made mistakes that void it.
Ask how long the company warranties their labor — one year is the bare minimum, but many reputable companies offer three to five years.
Get the warranty terms in writing. Some companies promise lifetime warranties but bury exclusions in the fine print that make claims nearly impossible. Make sure you understand what's covered, what isn't, and what steps you need to take if something goes wrong six months or three years down the road.
| Warranty Type | Typical Coverage Period | What It Protects |
|---|---|---|
| Manufacturer Product Warranty | 1-10 years (varies by component) | Defects in materials, springs, panels, hardware |
| Workmanship/Labor Warranty | 1-5 years | Installation errors, adjustment issues, improper fitting |
| Lifetime Warranties | Life of original owner | Premium springs, certain structural components (read exclusions carefully) |
Do Your Installers Follow UL 325 Safety Standards?
UL 325 is the safety standard for garage door operators in the United States, mandating features like automatic reversal systems that stop and reverse the door if it encounters an obstruction.[1]
This isn't optional — it's a life-saving requirement, especially in homes with kids or pets.
Any company installing or servicing garage door openers should be intimately familiar with UL 325 compliance. Ask specifically whether the opener they're installing meets current UL 325 standards and whether they'll test the auto-reverse and photo-eye sensors before completing the job.
If the installer looks confused or dismisses the question, you're talking to someone who either doesn't know the regulations or doesn't care about safety.
Can You Provide Local References?
Online reviews are helpful, but a phone call with a past customer tells you more. Ask for three to five references from jobs completed in the last year, preferably in your area.
When you call, ask about punctuality, cleanliness, how the company handled any issues that came up, and whether the work has held up over time.
If a company hesitates to provide references or only offers generic testimonials from their website, that's a red flag. Established pros have a list of satisfied customers ready to vouch for their work. Pay attention to whether the references had similar projects to yours — a company that excels at simple spring replacements might struggle with a complex custom door installation.
What's Your Timeline for Completing the Work?
Garage door projects vary widely in scope. A straightforward opener replacement might take a few hours. A full custom door installation could require ordering materials, pulling permits, and scheduling around weather — stretching the timeline to several weeks.
You need to know upfront how long you'll be without a functional garage door or living with construction disruption.
Ask what factors could delay the project and how the company communicates if problems arise. Do they provide a dedicated project manager or point of contact? Will they call if parts are backordered, or will you be left wondering why no one showed up?
Clear expectations about timing prevent frustration and help you plan accordingly.
Do You Handle Permits and Inspections?
Many jurisdictions require building permits for garage door replacement, especially if you're changing the door size, installing a new opener, or modifying structural elements. A professional company should know the local permit requirements and either handle the paperwork themselves or clearly explain what you need to do.
If a company says permits aren't necessary when your neighbors needed them for similar work, verify that independently with your city or county building department.
Skipping required permits can lead to fines, complicate future home sales, and create liability issues if something goes wrong. The permit and inspection process might feel like bureaucratic hassle, but it ensures the work meets code and gets documented properly.
What Happens If Something Goes Wrong After Installation?
Even the best installations occasionally need adjustments or develop issues as the door settles into regular use. Ask how the company handles post-installation service calls. Is there a grace period for free adjustments? How quickly do they respond to warranty claims?
What's the process for reaching someone if your door stops working at 7 PM on a Saturday?
The company's attitude during this conversation tells you a lot. If they seem annoyed by the question or give vague answers about "taking care of customers," you might struggle to get help when you need it.
Companies confident in their work will outline a clear process for addressing problems and stand behind what they install.
- Underwriters Laboratories (UL). "UL 325 Standard for Door, Drapery, Gate, Louver, and Window Operators and Systems." https://www.ul.com/standards/ul-325. Accessed March 30, 2026.
- International Door Association (IDA). "IDA Guidelines for Selecting a Garage Door Professional." https://www.doors.org/professionals/consumer-resources/choose-professional. Accessed March 30, 2026.
- Door & Access Systems Manufacturers Association (DASMA). "Door & Access Systems Manufacturers Association Technical Data Sheets." https://www.dasma.com/resources/technical/. Accessed March 30, 2026.