Impact Patio Door Installation in South Florida

The right choice depends on opening width, budget, and how much clear span you want when the door is open. In South Florida, sliding glass doors handle 70% of standard 6- to 12-foot patio openings at the lowest cost. For wider openings — 16 feet or more — multi-slide or telescoping configurations make structural sense. Bi-fold suits indoor-outdoor entertainment spaces where full opening clearance matters most. All types must carry a Miami-Dade NOA and pass TAS 201/202/203 testing to be installed legally in HVHZ counties.

Cost varies by configuration more than any other factor. A standard two-panel sliding glass door in Miami-Dade typically runs $3,500–$6,500 installed, including permit. French door pairs run $4,500–$8,000. Multi-slide and telescoping configurations for wide openings start around $8,000 and can exceed $25,000 for 20-plus-foot spans with premium brands like CGI Sentinel or ES Windows Multimax. Bi-fold (accordion) doors in La Cantina or Marvin Coastline typically land between $7,000 and $20,000 depending on panel count. All prices include permit filing.

Yes. Broward County falls within Florida's HVHZ (High-Velocity Hurricane Zone), and the Florida Building Code requires that all patio doors installed there carry a Miami-Dade NOA or a Florida Product Approval for impact products. Every unit we install is verified against the Miami-Dade NOA database before the permit is filed. The 175 mph design wind standard applies countywide in Broward just as it does in Miami-Dade.

Practically speaking, multi-slide configurations with six or more panels can span 32 feet or wider, but every project at that scale requires a structural header engineered for the clear span and a concealed flush track anchored to the slab. ES Windows Multimax and CGI Sentinel both produce HVHZ-rated panels for wide configurations. Beyond about 20 feet, we coordinate with a structural engineer of record as part of the permit package — this is standard practice, not an add-on.

Typically yes. Upgrading all patio openings to impact-rated doors is one of the highest-impact changes on a wind mitigation inspection report, because patio doors represent the largest glass area in most South Florida homes. Discounts on the wind portion of the premium commonly range from 15–35% across Palm Beach County, though the exact figure depends on your insurer and the scope of the upgrade. We provide a closed permit and product NOA documentation after every install — both documents your carrier will want for the wind mitigation re-inspection.

The two premium brands we install for impact-rated bi-fold patio doors in South Florida are La Cantina and Marvin Coastline. La Cantina uses a thermally broken aluminum frame well suited to salt-air environments; Marvin Coastline offers a wood-clad interior option for traditional or hardwood interior finishes. Both lines carry Miami-Dade NOA and are tested to TAS 201/202/203 standards. Annual hardware lubrication is the primary ongoing maintenance requirement for bi-fold configurations.

Permit issuance in Miami-Dade typically runs 2–4 weeks from the filing date for standard patio door replacements, assuming no structural changes to the rough opening. Large multi-slide or telescoping projects that require an engineer-of-record letter can add 1–2 weeks to review time. We file all permit documentation — including the NOA product approval numbers and installation drawings — as part of every contract. The permit closes after the building inspector's final visit post-installation.