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ES Windows Home Additions & ADU: The Orlando Owner’s Guide
An ES Windows home addition or ADU in Orlando typically runs $45,000 to $130,000 installed, depending on square footage, whether you’re tying into the existing roofline, and how the windows integrate with your current ES Windows product line. Most owners call us when the window frames in an existing addition start showing signs of seal failure or the new addition’s window specs don’t match the original ES Windows units, creating a mismatch that leaks air and drives up cooling costs. We stock the frames, sash components, and hardware needed to match ES Windows products correctly, and we can walk the entire project from tear-out to final trim.
The real problem we see in Orlando isn’t usually the glass itself. It’s the way additions and ADUs get windowed after the fact, with whatever was cheap and available at the big-box store. ES Windows products are built to specific frame depths and flange profiles. When an addition gets generic windows, the result is a visible step in the wall line and a thermal break that fails within a few Florida summers. That’s the call we get most often: “The new room never cools right, and the inspector flagged the window flashing.” Tell me what the problem is. We’ll figure out the rest from there.
Which ES Windows Models This Applies To
ES Windows builds both single-hung and horizontal roller lines, and the compatibility question changes based on which series your original home used. The frame depth on ES Windows single-hung units runs deeper than standard builder-grade windows, which means a replacement or addition window from a different manufacturer rarely fits the rough opening without furring strips and wider interior casing. That’s the compatibility gotcha most Orlando homeowners don’t discover until the new window is already ordered.
How to identify what you have: look for a silver or white label on the interior sash edge, usually on the side that slides. ES Windows labels carry a series code followed by the glass package designation, which tells you whether the unit is impact-rated or standard. If the label is gone, measure the frame depth from the interior drywall face to the exterior stucco face. ES Windows units run true to a specific depth, and once we have that measurement we can match OEM or a direct-fit equivalent. For Orlando, we recommend staying with OEM ES Windows frames on additions and ADUs that join an existing structure, because the flange profiles and reveal lines matter. On a free-standing ADU, a quality equivalent like a Miami-Dade impact-rated window from a comparable manufacturer can save 15 to 20% without giving up code compliance.
Styles & brands we work with
Signs Your ES Windows Home Additions & ADU Is Failing
- Condensation trapped between panes. The seal has failed and the argon or krypton fill is gone. Florida humidity makes this worse and it never fixes itself. The window’s thermal performance is now roughly equal to single-pane glass.
- Visible step or offset in the exterior wall line. This means the addition was windowed with a different manufacturer’s product, and the flange depths don’t match. Water gets behind the flange, and you’ll see stucco cracking within a year or two.
- Sash drags or binds when you open it. ES Windows frames are rigid. If the frame racked during installation or the addition settled, the sash will bind. Forcing it wears the roller or hinge hardware and eventually breaks the lock point.
- Daylight around the frame perimeter at dusk. Walk the inside with the lights off and look for gaps along the casing. Any light leak is an air leak, and in Orlando an air leak is a cooling bill that never stops growing.
- Interior drywall cracks radiating from the window corners. This is a structural tell, not a drywall issue. The addition’s framing or the window header isn’t carrying load the way it should, and the window is taking stress it was never built for.
See the difference
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After
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AfterReplacement Cost & What’s Included
For a full ES Windows home addition or ADU in Orlando, plan on $45,000 to $130,000 installed. The spread is driven by three things: conditioned square footage, whether the addition ties into the main structure (tie-ins cost more because the roofline and flashing have to be surgically matched), and whether the windows need to meet Miami-Dade impact standards. Impact-rated ES Windows units add real cost, but in central Florida they cut your wind mitigation and insurance exposure enough that many owners make the money back over a few policy cycles.
What you get with us: a written price before any work starts, with the window package, framing, drywall, trim, paint, and permit work all listed as separate line items. No verbal estimate that becomes a bigger invoice later. The 365-Day Done Right Promise covers the addition or ADU work for a full year from completion, and if anything we installed fails during that window we come back at no charge. If you’re replacing failed ES Windows in an existing addition rather than building new, the typical replacement runs as a remodel-scope project rather than new construction, and the price lands accordingly.
DIY or Call Us?
What you can safely do: identify the window series from the label, measure the frame depth, document the condensation or daylight gaps, and check whether your original plans call the windows impact-rated or not. That information saves time and lets you price a rough number before anyone shows up.
What we don’t recommend you do: pulling an ES Windows frame out of an addition wall yourself. The units are heavy, the flange is nailed behind the stucco, and when a window comes out of a Florida addition the wall cavity often reveals water damage that changes the entire scope. If the window is in a load-bearing wall and the header was undersized, you won’t know until the framing is exposed, and that’s a dangerous situation to walk into without shoring. Window replacement is not high-tension dangerous like a garage spring, but a window in a load-bearing addition wall can become structural faster than most people expect. Call (850) 920-7745 and we’ll schedule a free estimate with a straight answer on what has to happen.
FAQs
ES Windows in central Florida typically last 15 to 25 years before seal failure becomes likely, with south-facing units failing sooner due to constant sun load and thermal cycling. Impact-rated glass packages tend to outlast standard glass by five to seven years in our experience.
Once the insulated glass seal fails, the glass unit itself has to be replaced; there is no lasting field repair for a failed seal. If the frame is sound, we can often swap the glass unit alone and save you the cost of a full frame replacement. Call (850) 920-7745 and we’ll tell you which route applies after we look at it.
A typical Orlando home addition runs 3 to 6 months from permit issuance to final inspection, while a detached ADU usually runs 5 to 9 months depending on utility tie-ins and site work. We’ll put the schedule in writing when we deliver your price.
We stock common ES Windows hardware including rollers, locks, and balances on our trucks, and we order glass units and frames direct from the manufacturer or a direct-fit distributor when we have your measurements confirmed. Impact-rated glass packages take longer to source, which we factor into your schedule before work starts.
Written by Isaac Pruett, Owner, Mason Remodeling Co Orlando at Mason Remodeling Co Orlando, serving Orlando and nearby areas.
