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ECO Window Systems Home Additions & ADU: The Orlando Owner’s Guide
Home additions and ADUs built with ECO Window Systems products in Orlando typically run between $45,000 and $130,000 installed, depending on square footage, foundation work, and how much of the existing structure has to be tied in. We stock ECO Window Systems-compatible components on our trucks and can usually schedule an assessment within a few days. What we see most often when an existing ECO addition or ADU starts failing isn’t the framing or the roof, it’s the window and door seals degrading faster than expected in Florida’s heat and humidity. If you’re noticing drafts, condensation between panes, or a door that suddenly won’t latch square, the issue is usually the ECO Window Systems flashing or glazing channels, not the wall itself.
Mason Remodeling Co Orlando is an independent general contractor and remodeler. We’re not affiliated with ECO Window Systems, but we’ve worked on enough of their installations across Orlando to know the product line inside and out.
Which ECO Window Systems Models This Applies To

ECO Window Systems manufactures a range of impact-rated and non-impact aluminum and vinyl window lines, and the home addition or ADU you’re working on will almost always use one of their multi-unit door or window configurations rather than a single standalone unit. The part that fails is rarely the glass itself. It’s the perimeter glazing bead, the sill pan flashing, or the weatherstripping channel that was spec’d for a northern climate and didn’t survive three Orlando summers of daily thermal cycling.
Before you order anything, check the silver label on the inside edge of the operable sash. ECO Window Systems prints the series code there, and it matters more than the model name. An “EW-55” series uses a different glazing channel width than the “EW-70,” and installing the wrong channel means the sash won’t seat correctly, which lets water ride the frame straight into the wall cavity. For OEM parts, the lead time can run two to four weeks. Quality aftermarket glazing channels and weatherstripping profiles made to the same dimensional specs are usually in stock locally, and for most Orlando homeowners, that’s the smarter call. The seal material itself is the same EPDM or silicone compound either way.
Styles & brands we work with







Signs Your ECO Window Systems Home Additions & ADU Is Failing
- Condensation you can’t wipe off. If the moisture is between the two panes, the glazing seal on that ECO Window Systems unit has failed and is pulling humid Orlando air into the airspace. The insulated glass unit will eventually cloud permanently.
- The door or window sticks in the frame during the afternoon. Aluminum expands in the Florida sun more than people expect. If a south-facing door on the addition starts binding by 3 p.m. and loosens after dark, the frame wasn’t given proper expansion clearance at install.
- Water staining on the interior drywall below a window. That’s the sill pan flashing failing or missing entirely. Orlando gets 50-plus inches of rain a year, and a bad sill pan will find a way to show you exactly where it failed within one wet season.
- You can hear the road like the window’s open when it’s closed. Weatherstripping on the operable sash has compressed or torn. ECO Window Systems uses a friction-fit weatherstrip that doesn’t respond well to repeated full-sun exposure on the west elevation.
- The addition feels hotter than the main house at the same thermostat setting. On a properly sealed ECO Window Systems addition, the delta shouldn’t be more than a couple of degrees. A persistent gap usually means air is bypassing the glazing channel.
See the difference
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After
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After
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AfterReplacement Cost & What’s Included
For an Orlando ECO Window Systems home addition or ADU, full scope replacement work lands between $45,000 and $130,000. That’s the installed number: materials, labor, waste hauling, and the written line-item price we deliver before any work starts. A single-unit glazing channel or weatherstripping replacement on an existing addition runs far less, usually a few hundred dollars including the service call, and we’ll tell you honestly whether the fix is a part swap or a larger reconstruction issue. What drives the big range: square footage, whether the addition needs a new foundation tie-in, permitting requirements with the City of Orlando, and whether the existing window rough openings were framed correctly in the first place. Every job gets a written price up front, a written guarantee covering the work for 365 days from completion, and a free return visit if a repair fails during that year. Isaac Pruett signs off on every estimate personally, and he’ll give you a straight answer on what the job needs and what it doesn’t.
DIY or Call Us?
Replacing a torn weatherstrip on an ECO Window Systems sash is a Saturday-morning job a homeowner can handle with a utility knife and the right profile. Replacing a glazing bead or a sill pan is a different animal. One wrong measurement, and you’ve created a water path into the wall cavity that you won’t see until the drywall starts bubbling six months later. If the failure involves an impact-rated unit, the glazing system is part of the window’s structural rating, and guessing at it undermines the entire opening. Safety aside, the practical question is whether you want to spend your weekend fighting with aluminum extrusions in the Orlando heat. If you’d rather not, call (850) 920-7745 and tell us what you’re seeing.
FAQs

In Orlando’s climate, expect 7 to 10 years from EPDM glazing seals and weatherstripping on ECO Window Systems products before UV exposure and humidity start breaking them down. Coastal-side installations often shorten that to 5 years. If yours failed sooner, the install details, not the product, are usually the culprit. Call (850) 920-7745 for a straight assessment.
Weatherstripping, glazing beads, and sill pans are repairable on ECO Window Systems units. Clouded insulated glass means the whole sash or the glass unit gets replaced. We’ll tell you which one you’re dealing with before any money changes hands.
Single-unit sealing parts take one visit, usually under two hours. Full perimeter resealing on a large Orlando addition or ADU takes a day to a day and a half, depending on access. We’ll give you a time window in the written estimate.
Yes. Our techs carry common EPDM profiles, glazing bead sizes, and sill pan materials that match ECO Window Systems dimensional specs. If your job needs an OEM-only piece, we’ll get it ordered and keep you posted on timing. Call (850) 920-7745 for a free estimate.
Written by Isaac Pruett, Owner, Mason Remodeling Co Orlando at Mason Remodeling Co Orlando, serving Orlando and nearby areas.


