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PGT Home Additions & ADU: The Miami Owner’s Guide
If you have a PGT product tied to a home addition or ADU project in Miami, you’re likely facing a specific failure point: a window or door component that’s not performing, a frame that’s shifted during a remodel, or a part that needs matching before the next phase of work can start. We source and install PGT-compatible components for home additions and ADU builds, with typical installed project costs in Miami ranging from $53,100 to $153,400 depending on scope, structural requirements, and finishes. Most owners discover the issue when an inspection flags it, when a door starts sticking after a rough-in, or when a window seal fails on a south-facing wall after a few Florida summers.
A quick note before we get into the details: Penhallow Remodeling Miami is an independent remodeling company. We’re not affiliated with PGT, but we work with their products regularly because Miami homeowners ask for them by name. This page is about replacing or integrating PGT parts within a larger addition or ADU job, not just swapping a single component in isolation.
Which PGT Models This Applies To
PGT makes a wide range of impact windows and doors, but when we’re working on a home addition or ADU in Miami, we typically see three product families: the WinGuard series (aluminum and vinyl impact-rated), the Eze-Breeze porch enclosure line, and the ClassicVue patio door systems. Each has different rough opening requirements, and getting the wrong match means re-framing a wall you just paid to build.
Here’s the compatibility gotcha most owners don’t know: PGT window sizes are tied to specific production runs, and a WinGuard unit ordered for one Miami home may not fit the rough opening of another, even if the glass dimensions look identical. The frame depth matters. Always check the label on the side jamb: it lists the series, the DP rating (design pressure), and the manufacturing date. For ADU projects, Miami-Dade County requires impact-rated products with a specific Notice of Acceptance (NOA) number, and we verify that before ordering anything. Aftermarket parts exist for hardware like rollers and locks, but we recommend OEM components for anything structural, especially on impact-rated installations where the entire assembly is tested as a unit.
Styles & brands we work with
Signs Your PGT Home Additions & ADU Is Failing
When a PGT component is failing in a Miami home addition or ADU, the signs are usually pretty obvious once you know what to look for:
- Fogging or condensation between glass panes: This means the seal has failed and the insulating gas has escaped. In Miami’s humidity, a failed seal is never a cosmetic issue; it means the unit is no longer doing its job, and mold will eventually follow if moisture gets into the frame.
- Sticking doors or windows after a heavy rain: Miami’s wet-dry cycles cause the framing around an addition to shift slightly, and a PGT door that was perfectly plumb during installation can bind six months later. This is usually a framing issue around the unit, not the PGT product itself.
- Visible corrosion on the bottom track of a sliding door: Salt air near coastal Miami neighborhoods accelerates corrosion on aluminum tracks, and once the track begins to pit, the rollers wear out fast. We see this all the time in Coconut Grove and Coral Gables.
- Cracks in the caulking or sealant around window perimeters: This lets water behind the flange and into the rough opening. By the time you see a water stain on the drywall inside, the framing behind that PGT window has been wet for a while.
- A window or door that won’t lock securely: On impact-rated PGT units, the locking mechanism is part of the tested assembly. If the lock is loose or the door doesn’t fully engage, the unit isn’t providing the storm protection it was rated for.
See the difference
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After
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AfterReplacement Cost & What’s Included
For a full home addition in Miami, you’re looking at $53,100 to $153,400 installed. A garage conversion (one of the most popular ways to create an ADU in Miami) runs $35,400 to $94,400. Standalone ADU construction starts at $106,200 and can reach $259,600 depending on size, foundation work, and utility connections.
What drives the number up or down: the size of the addition, whether you’re tying into existing roofing or building new, the number and size of PGT windows and doors you’re integrating, and the finish level inside. Parts and labor are always itemized separately on our written estimates, so you can see exactly what the PGT components cost versus the framing, drywall, and finishes. Every project includes a written price before any work starts, and the 365-Day Done Right Promise covers the work in writing: if something fails inside that year, we come back and fix it at no charge. That’s the Kingswell standard, and we’ve been operating under it since 2004.
DIY or Call Us?
For a PGT component within a bigger addition or ADU project, there’s a clear line. You can safely check labels, measure rough openings, and take photos. You should not remove an impact-rated window or door yourself. These units are heavy, their installation is governed by Miami-Dade code, and a DIY removal can damage the surrounding framing or void the manufacturer’s warranty on the new unit. Trevor Nash has been straightforward about this since he first picked up a hammer in Los Angeles: some jobs look simple until the wall opens up and the story changes. Give you a number first, then pick up the tools. That’s how we work, and it’s why we don’t hand you a verbal ballpark that turns into something else after demo day.
If you’re mid-project or staring down a failed PGT component in an existing addition, call us at (850) 988-7559. We’ll come out, look at what you have, and give you a written price before anything else happens.
FAQs
In Miami’s salt air and humidity, a properly installed PGT impact window or door should last 20 to 30 years before the frame shows meaningful wear, though seals can fail earlier, especially on south-facing walls that get hammered by sun. Realistically, plan to replace hardware every 8 to 12 years and watch for seal failure after year 10. Call (850) 988-7559 if you’re seeing fogging or corrosion, and we’ll tell you whether it’s a repair or a replacement.
Yes, in many cases. Rollers, locks, and weatherstripping can be swapped without replacing the whole window or door. A failed glass seal, however, usually means replacing the sash or the entire unit, because resealing insulated glass in the field rarely holds in Miami’s humidity. We’ll always quote the repair first if it’s viable. Call (850) 988-7559 and we’ll give you an honest read on which path makes sense.
A single window or door swap takes one day once the unit is on site. The catch is lead time: PGT orders in Miami typically run 4 to 8 weeks from order to delivery, so we order early in the project to avoid stalling the rest of the work. On a full addition or ADU, we build the schedule around that delivery window. Call (850) 988-7559 to get a timeline for your specific project.
We stock common hardware like rollers, locks, and handles for PGT sliding doors and windows on our trucks, so many repair calls are same-day fixes. Full window and door units are ordered per project because sizes and finishes vary so much across Miami homes. If you need a specific part, call (850) 988-7559 and we’ll check the truck before we schedule anything.
If you’re planning a home addition or ADU in Miami and want PGT products installed correctly the first time, call (850) 988-7559 for a free estimate. We’ll give you a written number, tell you exactly what’s included, and stand behind it in writing. We also work with other recognized brands like KraftMaid, Cambria, and Silestone for the interior finishes that go alongside PGT’s exterior products.
Written by Trevor Nash, Owner, Penhallow Remodeling Miami at Penhallow Remodeling Miami, serving Miami and nearby areas.
