PGT Home Additions & ADU in South Florida, FL

PGT Home Additions & ADU: The South Florida Owner’s Guide

PGT-compatible home additions and ADU construction in South Florida typically runs $45,000-$130,000 for home additions and $90,000-$220,000 for full ADU builds, with PGT window and door packages integrated into the envelope design. We stock and install PGT impact-rated window and door systems as part of our addition and ADU projects, and we can typically begin rough-in within two to three weeks of permit approval. Most South Florida homeowners discover their existing PGT products need attention during addition projects when they try to match new openings to weathered originals, or when an ADU requires impact-rated glazing that the main house already has.

Call (844) 665-0162

Which PGT Models This Applies To

PGT’s product lines break into three categories you’ll encounter in South Florida homes: WinGuard (vinyl and aluminum impact-resistant windows and doors), EnergyVue (vinyl impact windows), and ClassicVue (non-impact aluminum for interior or protected applications). For home additions and ADUs in South Florida, WinGuard is the standard because Miami-Dade and Broward counties require HVHZ (High Velocity Hurricane Zone) compliance on all new exterior openings.

To identify what you’ve got, check the etched mark in the glass corner or the label on the frame jamb. The series code tells us the wall depth, which determines whether your addition framing will accept the same product or needs adaptation. WinGuard Aluminum uses 2⅞-inch frame depth; WinGuard Vinyl uses 3¼-inch. Mix these in the same wall plane and you’ll have alignment problems at the drywall.

We are an independent service provider, not affiliated with PGT. We source PGT products through authorized distribution, but we also spec CGI and Andersen when the project calls for different performance or price points. That’s your choice, not ours.

Signs Your PGT Home Additions & ADU Integration Needs Attention

• Condensation between panes on existing PGT units. The insulated glass seal has failed, which is common in South Florida after 10-15 years of thermal cycling. In coastal zones like Hollywood or Fort Lauderdale, salt air accelerates the edge seal degradation, and matching replacement IGUs to new PGT units in your addition requires careful spec alignment.
• Difficulty operating windows that used to glide. The balance system or roller hardware has corroded, often from irrigation overspray or pooling on sills. We see this in ground-floor additions near paver patios where drainage was never properly addressed.
• Air infiltration around frames during afternoon storms. The weatherstripping has compressed or the frame has shifted in the opening. South Florida’s afternoon thermal expansion cycles, especially on west-facing walls, stress the frame-to-wall interface more than northern climates.
• Water staining at the head or sill of PGT doors. The flashing integration between PGT’s nailing fin and the WRB (weather-resistant barrier) has failed, or the sill pan was omitted during original installation. Additions give us the chance to correct this on the existing wall while we’re tying in the new.
• Cracked or delaminating impact glass after a named storm. Even intact impact glass can suffer micro-fractures that compromise the laminate layer. Post-Ian, we found this in PGT units throughout Naples and Marco Island that looked fine until you caught them in raking light.

Replacement Cost & What’s Included

What drives the range: wall condition at tie-in points, whether we’re matching existing PGT profiles or upgrading the whole house, and permit complexity. Miami-Dade’s HVHZ permitting adds roughly 10-15% to material specs versus standard Florida product. Our quotes separate PGT material costs from labor and rough carpentry so you see where the money goes. We carry PGT’s current catalog in our spec library, and we can pull archived series data for homes built in the 2005-2012 window when PGT transitioned frame profiles.

DIY or Call Us?

There’s a clear line here. A homeowner can safely verify the PGT series from the etched glass mark, photograph the frame profile, and check for visible water damage at the interior drywall. That homework saves us time on the first visit.

What you shouldn’t attempt: removing or installing impact-rated units yourself. PGT’s WinGuard products weigh 40-60% more than standard windows, and the fastening pattern into the buck frame is spec-critical for HVHZ certification. Miss a fastener spacing, or use non-galvanized hardware in South Florida’s salt air, and you’ve voided the rating that got you the permit in the first place. The same applies to door sills, which need positive slope and pan flashing that ties into the WRB. We’ve re-done enough DIY and handyman installations to know that “do it right the first time or you’ll do it twice - and the second time always costs more.”

Call (844) 665-0162 and we’ll walk through what you’re seeing. Estimates are free, and we can typically assess PGT compatibility on a video call before the site visit.

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