The best impact door company in South Florida is one that quotes an approved product for every door, installs it exactly as that approval shows, seals the threshold against wind-driven rain, pulls the permit itself and puts two warranties in writing. Doors need more checks than windows because the whole door system is approved together.
Below are the door-specific questions to ask, the red flags to walk away from, and the general checks every installer should pass. For how impact doors work and which types exist, start with our impact door overview for South Florida homeowners.
Evaluating an Impact Door Company in South Florida
Judge an impact door company first on the checks that apply to any contractor: an active Florida license, current insurance, a permit in its own name and written warranties. We cover those in detail in our six checks for choosing an impact window company, and they apply to doors without change.
Doors then add their own questions. Use this table during the estimate:
| Door check | What to ask the installer |
|---|---|
| Whole assembly approval | Which approval number covers this exact door, size and configuration? |
| Hardware and anchors | Are the lock, handles and anchors the ones listed in the approval? |
| Threshold and water | What water rating does the door have, and how will you seal the sill? |
| Swing direction | Does the approval cover inswing, outswing or both? |
| Garage door | Is the garage door impact rated, or rated for wind pressure only? |
| Installation crew | Who installs the doors, and who checks the work before the inspection? |
A company that answers each line with a document or a clear explanation is one you can compare with confidence. If you already know which style you want, browse the impact entry, French and sliding doors we install.
Ask for the Approval That Covers the Whole Door Assembly
An impact door is approved as one complete assembly: the frame, the panel, the glass, the hinges or rollers, the lock, the threshold and the anchors that hold it in the wall. The approval only applies when the installed door matches what was tested, so the installer has to quote and install that exact combination.
In Miami-Dade and Broward, which are in the High-Velocity Hurricane Zone (HVHZ), look for a Miami-Dade Notice of Acceptance (NOA) from Miami-Dade Product Control, or a Florida Product Approval that is valid in the HVHZ.
In Palm Beach County, look for a Florida Product Approval number you can search on floridabuilding.org. Ask for the number for each door, not one number for the whole job.
Check these door details against the approval:
- Size and configuration: a sliding door approved with two panels is not automatically approved with three, and a single French door is not the same approval as a pair.
- Sidelites and transoms: glass beside or above an entry door is a glazed opening and needs an impact rating too. Where a door and sidelites are joined, the mullion between them must be covered by an approval.
- Hardware: a different lock, handle or hinge can look like a small upgrade, but it can take the door outside its approval. Ask before you swap any part.
- Anchors: the type, size and spacing of the anchors come from the approval drawings. Fewer or different anchors to save time is a compliance problem.
- Design pressure (DP): the door’s rating, in pounds per square foot, must meet or exceed what that opening requires.
The same logic applies to replacing only part of a door. Hanging a new impact slab in an old frame does not create an approved impact door, because the frame and threshold were never tested with it.
If you want the background on the lab work, here are the lab tests behind an impact door rating. Unsure what is on your house now? Learn how to check whether your current doors are rated.

Thresholds and Water Resistance for Sliders and Outswing Doors
An impact rating tells you the door can survive debris and wind pressure. It does not tell you how much wind-driven rain the door keeps out, which is a separate water rating on the door’s test results.
Ask the installer for both numbers, especially for sliding doors and doors that face open water or take the full force of storm winds.
Most leaks around impact doors come from the bottom of the opening. A careful installer will explain:
- The sill and threshold: how the threshold is set, leveled and sealed to the slab, and how it ties into the stucco and flooring.
- Weep holes: sliding door frames drain water through small openings in the sill track. They must stay open, so ask how the crew protects them during installation and how you should keep them clear.
- Floor height: a threshold set flush with a patio slab that slopes toward the house invites water in. Ask what the crew does when the slab is level with the floor inside.
Sliders are the most common patio door in South Florida, and the widest. If you are comparing styles and panel layouts, see our impact sliding glass doors for South Florida patios.
Swing Direction: Inswing or Outswing
Product approvals list the swing direction they cover, so an entry or French door must be ordered and installed in a configuration its approval includes. Ask the installer which direction your door will swing and confirm the approval covers it.
Outswing doors are popular in South Florida because wind pushing on the outside presses the door against its frame stops, and the threshold can be designed to shed water outward.
Inswing doors are still available as impact doors, and they can make more sense where an outswing door would hit a step, a railing or a narrow porch.
A good installer will look at the space on both sides of the opening, the steps and landing, and how you use the door every day before recommending a direction. A company that orders whatever is in stock, without asking, has skipped this check.
Impact Garage Doors: Impact-Rated or Wind-Load Only
Garage doors come in two kinds of rating, and an impact door company should tell you which one it is quoting. A wind-load-rated garage door is tested to withstand a set wind pressure.
An impact-rated garage door has also passed the large missile test, so it is designed to resist flying debris as well as pressure.
Where your home is decides what code requires. In Miami-Dade and Broward, garage doors need a large missile impact rating whether or not they have windows, as garage door maker Clopay explains in its Florida wind code guide for garage doors.
Elsewhere in Florida, the requirement depends on the wind zone and the design pressure for your opening.
The rating also matters for insurance. On the state wind mitigation form, the top opening protection level (A.1) requires every opening, including the garage door, to be large missile impact rated.
A garage door verified only for wind pressure fits a lower level (A.2), and one that cannot be identified as rated drops lower again, as the My Safe Florida Home support center explains in its guide to opening protection ratings on form 1802.
Ask for the garage door’s approval number and the label location, and check that the tracks, reinforcement and jamb anchors are installed as the approval shows. You can compare impact-rated garage door options for South Florida homes before the estimate.

Licensing and Insurance
Every company that installs impact doors in Florida should hold an active contractor license from the Department of Business and Professional Regulation (DBPR). Ask for the license number, search it on the DBPR license search at myfloridalicense.com, and check that the status is active and the name matches your contract.
For insurance, ask the company’s agent to send you certificates for general liability and workers’ compensation, with your address on them and dates that cover your installation. Impact doors are heavy, and a sliding panel or a garage door section dropped during installation can damage floors, walls and people.
If the garage door is installed by a different company, run the same checks on that company too.
Who Pulls the Permit for Your Impact Doors
The licensed contractor should pull the building permit in its own name. Replacing an exterior door with an impact door needs a permit in South Florida, and the product approval for each door is part of the permit application.
- Permit: be wary if a company asks you to pull an owner-builder permit. That makes you responsible for the work meeting code.
- Final inspection: the building inspector checks that the installed doors match their approvals. Hold the final payment until the job passes.
- Closed permit: keep it with the approvals and the invoice. A wind mitigation inspector and a future buyer may both ask for them.
Miami-Dade has its own approval and permit steps for doors. Read our guide to Miami-Dade permit and NOA rules for doors if your home is in the county.
Get Every Door Itemized in the Written Quote
A written quote should list every door separately: type, size, configuration, swing direction, glass, frame color, hardware, approval number and design pressure. It should also say who removes the old door, who repairs stucco and trim, and whether the permit is included.
Use our list of what an impact door quote should include as you read each one. When you have two or three quotes, this method shows how to compare written quotes item by item, and it works for doors as well as windows.
Two Warranties to Get in Writing for Each Door
Every impact door comes with two separate warranties. The manufacturer’s warranty covers the door itself: frame, glass, seals and hardware. The installer’s workmanship warranty covers the installation: leaks, anchoring, sealing and adjustment.
For doors, ask a few extra questions:
- Are rollers, locks and hinges covered, and for how long?
- Does the hardware finish have its own terms near salt water?
- Who adjusts a slider or French door that starts to drag or stops locking smoothly?
- What voids the warranty, such as changing hardware or skipping track cleaning?
- Does the warranty transfer if you sell the home?
A company that only says it “honors the manufacturer’s warranty” has not told you who comes back when the threshold leaks.
Customer Reviews and Testimonials
Reviews show how a company handles the work after the contract is signed. Read reviews on more than one site and look for door-specific comments: doors that close and lock smoothly, sliders that do not leak, clean stucco and trim work, and crews that came back to adjust something.
Ask each company for references from recent door jobs near you, and ask how it handled a surprise such as rotted framing behind an old door. You can see what homeowners say about our work and ask us for references in your area.
The Risks of Selecting the Wrong Impact Door Company
A poor installer can turn an approved impact door into an opening that leaks, fails inspection or does not perform as tested in a storm. The approval assumes the door is installed exactly as its drawings require.
- Water damage: a badly set threshold or blocked weep holes let water into floors and walls.
- Failed inspections and delays: the wrong size, swing or hardware can mean a reorder and a second visit.
- Lost insurance credit: doors and garage doors without paperwork may not be counted as protected on a wind mitigation inspection.
- Weaker storm protection: a door with missing anchors or swapped hardware may not hold as tested.
Walk away from any impact door company that shows these red flags:
- No approval number for the doors it quotes, or one number for every door.
- Offers to put a new impact slab in your old frame.
- Calls a wind-load-only garage door “hurricane proof” without explaining the rating.
- No license number you can look up, or asks you to pull the permit yourself.
- Pushes you to sign today, or knocks on doors right after a storm.
- Gives the warranty only by word of mouth.

How USA Home Improvement Handles Impact Door Projects
We welcome every check on this page. USA Home Improvement installs impact French, sliding and pivot doors and impact garage doors for homes across Miami-Dade, Broward and Palm Beach counties.
- Licensed and insured: ask for our license number and look it up on the DBPR site yourself.
- Permits handled: every project is permitted; we pull the permits and schedule the inspections.
- Approved products: our impact windows and entry, French, sliding and pivot doors are ES Windows products, and you can get the Florida Product Approval number for each door on request.
- Certified installers: our installation team holds direct certification from the manufacturer.
- Warranty: a 15-year warranty and a 1-year labor warranty on most jobs, plus a transferable warranty.
- One point of contact: a project manager from measurements to final inspection.
If the budget is the sticking point, financing options for impact doors and windows, if available, come through independent third-party providers: qualified homeowners may get no down payment, 0% interest plans and fast approval with a soft credit check.
PACE financing is another option for eligible projects, secured through a voluntary assessment on the property, with rates and terms that vary by program.
Impact Door Company FAQs
Can I buy my own impact door and hire a company to install it?
You can, but it splits responsibility. The installer has to match the door’s approval drawings, pull the permit and pass inspection with a product it did not choose, and many companies will not give a workmanship warranty on it.
If the door arrives in the wrong size or swing, you carry the cost. Most homeowners are better served by one company supplying and installing.
Should a garage door company or an impact door company install my garage door?
Either can, as long as the installer is licensed, quotes an impact-rated garage door with its approval number, and installs the tracks, reinforcement and anchors as that approval shows.
Using one company for all openings keeps the paperwork for the wind mitigation inspection in one place, which helps if you are aiming for full opening protection.
Do I need the same company for my doors and windows?
No, but one company for both usually means one permit process, one schedule and matching frames and glass. If you split the work, make sure each company pulls its own permit and gives you the approvals for its products, so your records show every opening is protected.
Ready to Secure Your Home?
Shortlist two or three companies, run the general checks, then ask every door question in the table above. The company that answers with approval numbers, a sealed threshold plan and written warranties is the one to trust with your doors.
Want to run those checks on us? Call USA Home Improvement at (877) 554-6373 or request a free estimate, and we will bring the approvals for every door we quote.
USA Home Improvement is licensed (CGC1526707) and insured and has served Florida homeowners for more than 15 years.