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ES Windows Home Additions & ADU: The Miami Owner’s Guide
If you’re building a home addition or ADU in Miami and you’ve already committed to ES Windows products, we stock and install the ES Windows lines that work for new construction and additions. A full home addition with ES Windows typically runs $53,100 – $153,400 in Miami, with ADU construction starting around $106,200 and reaching $259,600 depending on size, foundation work, and window count. Most Miami owners call us after they’ve already bought ES Windows and realized their existing contractor either can’t get them, can’t install them correctly, or left gaps that are now leaking during hurricane season.
Here’s the thing about ES Windows in South Florida: they’re built for impact, but only if the rough opening is right, the anchoring is done to Miami-Dade code, and the flashing detail is correct on all four sides. We see the same failure pattern every summer. Someone bought premium ES Windows impact units, a lower-priced crew slapped them in without proper bucking or sealant, and by August the homeowner has water staining the drywall below a window that was supposed to be hurricane-rated. The window isn’t the problem. The installation was. That’s what we fix, and it’s what we get right the first time when we’re doing the addition or ADU from the start.
Key Takeaways:
- ES Windows additions and ADUs in Miami run $53,100 – $153,400 for the build, with ES Windows impact units typically accounting for $15,000 – $40,000 of that depending on count and sizes.
- ES Windows are impact-rated only when installed to Miami-Dade County product approval specs. Anchoring pattern, fastener type, and sealant all matter and are all inspected.
- We’re an independent Miami contractor. We install and service ES Windows products but we’re not affiliated with the manufacturer.
- Every ES Windows addition quote from us is a written line-item price before work starts. No verbal number that grows later.
Which ES Windows Models This Applies To
ES Windows makes a range of aluminum impact lines, and the right one for your Miami addition or ADU depends on what your architect or engineer already specified. The big compatibility gotcha we run into constantly: an owner bought ES Windows sliding doors sized for a standard block wall, then their designer changed the wall to a wider opening mid-project. ES Windows extrusion profiles are not trimmed on site. The frame is engineered to the exact opening dimensions, so if your opening changes by even half an inch, you’re ordering a new unit or re-framing the opening. That mistake costs Miami homeowners thousands every year.
For most single-family additions and backyard ADUs in Miami, we recommend and install ES Windows’ impact-rated fixed, casement, and sliding configurations with the standard Miami-Dade NOA (Notice of Acceptance) approval. You’ll find the exact product label on the side jamb of the frame or on the glass itself. We need that label to match a replacement or order the matching unit. If you’re mixing ES Windows in a new addition with existing windows in the original house, we can match the finish and sightlines, but the series has to match too. A 7000-series unit won’t accept the same mullions or trim as a 6000-series. That’s the kind of detail that shows up in our written quote, not after the order is placed.
On parts specifically: most ES Windows hardware, gaskets, rollers, and locks are OEM-specific. There are quality aftermarket rollers and weatherstripping that work fine, but we don’t use them unless we’ve verified fit on the exact series in the field. For anything that carries the impact rating, OEM is the only path. It’s how the product approval stays valid.
Styles & brands we work with
Signs Your ES Windows Home Additions & ADU Is Failing
For an existing addition or ADU with ES Windows, here’s what tells us something is wrong:
- Water staining below a window or sliding door after heavy Miami rain. Usually a failed sill flashing detail or deteriorated sealant at the fin. The water is getting in behind the frame and traveling down the wall. It will rot the buck and the drywall if left alone.
- The sliding door drags or jams when you open it. The rollers are worn or the track has settled. In a Miami ADU built on fill, slight settling is common and the door is often the first thing to bind.
- Condensation or fog between the glass panes. The sealed unit is compromised. The laminated glass is still structurally sound, but the energy performance is gone and the seal is not repairable without replacing the IGU.
- You can feel air moving around a closed window or door. The gasket or weatherstripping has compressed or torn. In Miami’s humidity, that air movement is carrying moisture into the wall cavity.
- The window is hard to lock or the handle feels loose. Hardware wear, but also a sign the sash may have shifted. On an impact-rated unit, a window that doesn’t lock isn’t rated for impact anymore. The lock is part of the structural system.
See the difference
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AfterReplacement Cost & What’s Included
When we talk about ES Windows on a home addition or ADU in Miami, we’re usually talking about replacing one or two failed units, or ordering the full window package for the new build. For a single failed ES Windows sliding door on an existing Miami ADU, you’re looking at roughly $4,500 – $11,000 installed, depending on size and whether it’s a repair or a full unit replacement. A full new ADU with ES Windows throughout lands in the $106,200 – $259,600 range for the entire build.
What drives the range on window-specific work:
- Opening size and unit count. ES Windows are priced by the square foot of the opening, and a 12-foot slider is a different animal than a 4-foot fixed unit.
- Existing framing condition. If the original install rotted the buck or the lintel is undersized, that’s carpentry work before the new window goes in.
- Access. A second-story ADU window on a zero-lot-line lot in Coconut Grove means scaffold or a lift. That’s real labor, and it’s in the quote.
- Permit and inspection. We pull permits and the work is inspected. That’s not optional on impact-rated work in Miami, and any contractor who says otherwise isn’t doing it to code.
Every quote is written, line-item, and fixed. Parts and labor are separated. If the written price says $7,800, you pay $7,800, and that’s true even if we find rot or a bad header once the old unit is out. We eat our own surprises. The work is covered by our 365-Day Done Right Promise: if something isn’t right within a year of completion, we come back and make it right at no charge.
DIY or Call Us?
You can check a few things yourself. Look at the sealant lines around your ES Windows frames and see if they’re cracked or pulling away. Check the weep holes on the bottom track of sliders, because clogged weeps hold water and that water finds its way inside. You can clean the track and confirm the lock engages. Those are all safe, useful checks.
But installing or replacing an ES Windows unit is not a weekend project, and it’s not a handyman job. These are heavy aluminum frames with laminated impact glass. A mismeasured rough opening, a wrong anchor pattern, or a bad flashing detail means the unit loses its Miami-Dade product approval, and your insurance company can and will deny a claim if a storm comes through and that window wasn’t installed to the approved spec. We’ve torn out too many “good deal” installs that failed. Call us at (850) 780-8123 and tell us what you’re dealing with. We’ll give you a straight answer and a written quote for the fix.
FAQs
A properly installed ES Windows impact unit should last 20 – 30 years in Miami’s salt air and UV exposure, though the gaskets, rollers, and sealant typically need attention every 7 – 10 years. Call (850) 780-8123 if you want us to assess the condition of yours. Estimates are free.
Hardware, rollers, gaskets, and sealant can usually be repaired or replaced; a fogged IGU or a bent or corroded frame usually means a full unit replacement. We’ll tell you which one you need before you spend a dollar. Call (850) 780-8123 for an exact answer and a written quote.
A single-unit replacement on an existing Miami addition usually takes one day on site, not counting permit wait time; a full window package for a new ADU installs over 2 – 4 days once the rough openings are ready. Call (850) 780-8123 and we’ll give you a realistic schedule for your specific project.
We keep common ES Windows rollers, locks, gaskets, and weatherstripping stocked for the series we install most in Miami, and anything else is a near-instant order through our supplier network. If you know your series number, call (850) 780-8123 and we’ll check the truck before we come out.
Written by Isaac Pruett, Owner, Mason Remodeling Co Miami at Mason Remodeling Co Miami, serving Miami and nearby areas.
