Most South Florida homeowners shopping for hurricane protection start with one question: “Should I replace my windows first, or my doors?” It’s a fair question—and the honest answer is that impact doors and impact windows aren’t the same product, don’t follow the same installation process, and carry different structural responsibilities in your home. Understanding those differences helps you make smarter decisions about where to start, what to budget, and what to expect during the project.
Here’s a straightforward breakdown of how impact door installation and impact window installation differ—and why both matter for complete hurricane protection across Palm Beach, Broward, Martin, Lee, Collier, and Charlotte counties.
What Makes Impact Windows and Doors Different Products
At their core, impact windows and impact doors both use laminated safety glass designed to resist wind, debris, and pressure changes during a hurricane. But that’s largely where the similarity ends.
Impact windows are engineered primarily to resist lateral wind load and projectile impact. They’re set into reinforced frames—typically aluminum—that anchor into the rough opening of your wall. The glass itself is laminated with an interlayer (often polyvinyl butyral or PVB) that holds the pane together even if it cracks under impact, preventing dangerous glass fragments and maintaining the building envelope.
Impact doors, on the other hand, are load-bearing assemblies. Whether you’re installing an impact entry door, a sliding glass door, or an impact-rated French door, these products must withstand not just wind pressure but also repeated operational stress—hinges, locks, thresholds, and multipoint locking systems all bear structural responsibility. Entry doors also tie directly into your home’s framing in ways that windows don’t, which is why the installation process is more complex and why hiring qualified impact door installation contractors matters so much.
The Impact Window Installation Process
A professional impact window installation in South Florida follows a well-defined sequence required by the Florida Building Code and governed by product approval numbers issued by the Florida Department of Business and Professional Regulation.
Site Preparation and Removal
Before any new window goes in, the existing window and frame must be removed cleanly. Installers inspect the rough opening for rot, water intrusion, or structural compromise—a critical step in coastal counties where saltwater exposure can degrade framing over time. Any damage found must be repaired before installation proceeds.
Frame Setting and Anchoring
The new impact window frame is set into the opening and anchored using a pattern specified in the product’s Florida Product Approval documentation. This isn’t guesswork—anchor type, spacing, and embedment depth are all code-prescribed. Improper anchoring is one of the most common failure points in non-professional installations, and it’s also one of the primary reasons permits and inspections exist.
Sealing and Finishing
Perimeter sealing with appropriate caulk or foam creates the weather-resistant barrier that keeps wind-driven rain from infiltrating your home. Trim work is applied, and the installation is inspected by a local building official before the permit is closed.
The Impact Door Installation Process
The impact door installation process shares some steps with window installation but involves additional complexity—particularly for entry doors, sliding glass doors, and garage doors.
Structural Assessment
An impact door isn’t just dropped into an opening. Installers evaluate the surrounding framing, the condition of the threshold, and the integrity of the header above the opening. Entry doors in older homes in areas like Boca Raton or Fort Myers sometimes require framing modifications to properly support a new impact-rated door unit.
Door Unit Installation
The door unit—frame, slab, and all hardware—is set, leveled, plumbed, and shimmed before anchoring. Multipoint locking systems used in most modern impact doors require precise alignment to function correctly; a door that’s even slightly out of plumb can compromise both security and storm performance. Hinges and strike plates are anchored into the structural framing, not just the door jamb.
Threshold and Weather Stripping
A properly installed threshold is critical for impact doors. It must create an airtight, water-resistant seal at the base of the door while remaining ADA-accessible where required. The weather stripping on an impact door is more substantial than on a standard door and is part of the tested assembly—you can’t substitute components without potentially invalidating the product approval.
Hardware and Locking Systems
Unlike windows, impact doors involve keyed locks, multipoint latching hardware, and sometimes electronic access systems. These must be installed and adjusted according to manufacturer specifications to meet both Florida Building Code requirements and the insurance documentation standards that many carriers require. According to the Florida Building Commission, all impact door products installed in High-Velocity Hurricane Zones must carry verified product approval numbers—something a licensed Florida Certified General Contractor will confirm before any work begins.
Impact Garage Doors: A Separate Category
Many homeowners overlook the garage door when planning hurricane protection upgrades, but it’s one of the most vulnerable openings on any property. A standard garage door failure during a hurricane can cause catastrophic pressure changes that damage the entire structure.
Impact garage doors—including the increasingly popular custom impact glass garage doors—are tested to meet wind load requirements and are engineered with reinforced horizontal sections, heavy-duty tracks, and bracing systems that standard doors simply don’t have. Our impact garage door installation process involves precise track alignment, spring tension calibration, and structural anchoring that goes well beyond a typical door replacement.
Custom impact glass garage doors deserve special mention. These units combine hurricane-rated frames with impact-rated glass panels, offering both storm protection and curb appeal. They’re growing in popularity across Palm Beach and Broward counties for good reason—they bring natural light into the garage while meeting Florida Building Code requirements. Manufacturers like Amarr and Clopay offer tested assemblies in this category, and proper installation is essential to maintain their impact ratings.
Key Differences Side by Side
- Structural complexity: Impact doors involve load-bearing framing connections; windows are primarily anchored into wall assemblies without the same degree of structural load transfer.
- Hardware requirements: Doors require multipoint locking systems, hinges, and thresholds as part of the tested assembly; windows use frame anchors and sealants.
- Installation time: A single impact door installation typically takes longer per opening than a window installation due to alignment, hardware, and threshold requirements.
- Product approval complexity: Both carry Florida Product Approval numbers, but door assemblies involve more components that must be tested together—swapping out hardware can void the approval.
- Permit and inspection process: Both require permits in all six counties we serve, but door inspections may involve additional checkpoints related to egress compliance and structural connections.
- Cost considerations: Impact doors generally cost more per opening than impact windows due to hardware, complexity, and framing work—though both represent significant long-term value in storm protection, energy efficiency, and potential insurance benefits.
Why Professional Installation Matters for Both
The Federal Emergency Management Agency’s building science guidance consistently points to improper installation—not product failure—as the leading cause of hurricane damage in residential structures. An impact window or door is only as effective as the installation behind it.
As a licensed Florida Certified General Contractor with 30+ years of experience serving South Florida families, we’ve seen firsthand what happens when impact products are installed without proper permits, without verified product approval numbers, or by contractors unfamiliar with Florida Building Code requirements. The products may look fine—until a storm tests them.
Our military family-owned approach means we treat every installation with the same discipline and accountability we’d want for our own homes. Whether you’re upgrading windows in Deerfield Beach, replacing entry doors in Boca Raton, or installing impact garage doors in Fort Myers, the standard never changes.
Frequently Asked Questions
Should I install impact windows or impact doors first?
There’s no universal answer—it depends on your home’s most vulnerable openings, your budget, and your timeline. Many homeowners prioritize entry doors and garage doors first because failures in those areas cause the most structural damage. A professional assessment can help you sequence your project for maximum protection at each phase.
Are impact doors and impact windows installed by the same contractor?
They can be and ideally should be. Using a single licensed contractor for both products ensures consistent permit management, product approval verification, and accountability. At Access Doors & Windows, we handle impact windows, impact doors, and impact garage doors under one license and one project team.
Do impact door installations require permits in all South Florida counties?
Yes. In Palm Beach, Broward, Martin, Lee, Collier, and Charlotte counties, impact door and window installations require a permit and inspection. This protects you legally, ensures code compliance, and is often required to document improvements for insurance purposes.
Can I choose any hardware for my impact door after installation?
No. Impact doors are tested and approved as complete assemblies. Replacing hardware components with non-approved substitutes can void the Florida Product Approval and potentially compromise the door’s storm rating. Always consult your installer before making any changes to hardware.
What is the difference between a standard sliding glass door and an impact-rated sliding glass door?
An impact-rated sliding glass door uses laminated impact glass, reinforced frames, and tested locking hardware to meet Florida Building Code wind and impact requirements. Standard sliding glass doors offer no meaningful hurricane protection and are among the most common failure points in South Florida storms.
Ready to Protect Your Home?
Whether you’re starting with windows, doors, a garage door, or a complete whole-home protection upgrade, the right partner makes all the difference. Access Doors & Windows has served South Florida families from Deerfield Beach to Boca Raton to Fort Myers for over 30 years—always with professional installations, verified product approvals, and a no-pressure, consultative approach.
Call us today at (561) 283-2777 to schedule a free consultation and find out exactly what your home needs for complete hurricane protection.
