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ES Windows Home Additions & ADU: The Jacksonville Owner’s Guide
If you’re planning a home addition or ADU in Jacksonville and you’re specifying ES Windows products, the installed project cost typically runs $45,000 to $130,000 depending on square footage, foundation work, and how many window and door openings you’re cutting. We install ES Windows-compatible home additions and ADUs in Jacksonville, and we stock the necessary framing, flashing, and installation hardware on our trucks so the window package doesn’t stall your schedule. Most homeowners realize they need specialized help with ES Windows midway through planning: the window specs call for exact rough openings, specific flashing details, and a nailing flange pattern that doesn’t line up with a generic window opening.
What we see most often in Jacksonville is a homeowner or a previous contractor framing an addition around the wrong window dimensions, then discovering at inspection that ES Windows needs 1/4-inch tolerance on rough openings and a specific sill pan detail to hold its warranty. By then the drywall is up or the stucco is on, and the fix costs double what it would have at rough framing stage. If you’re reading this while your addition is still on paper, you’re in the right place. If you’re reading this after the rough opening was cut wrong, call us at (904) 337-5929 and we’ll square it away.
Which ES Windows Models This Applies To
ES Windows produces several product lines for residential additions and ADUs, and the installation requirements vary by series. The ES Windows 300 Series is a vinyl-framed single-hung and horizontal slider commonly specified for ADUs because of its price point and Florida product approval ratings. The 500 Series steps up to a multi-chambered vinyl extrusion with a deeper frame pocket, which changes the rough opening depth by roughly 3/4 inch compared to a 300 Series. The 700 Series adds impact-rated laminated glass and heavier frames, which means the rough opening header needs to carry more load and the sill needs additional shim points.
Here’s the compatibility gotcha we run into in Jacksonville: a 300 Series and a 500 Series window with the same glass size are not interchangeable in the same rough opening. The frame depths differ, the nailing fin offsets differ, and the interior trim returns land differently. If you’re replacing a failed window in an existing addition, match the series by reading the label on the edge of the sash or on the frame header. It’ll say the series number, the glass size, and the DP rating. If the label’s gone, measure the frame depth at the jamb, not the glass. That number gets you 90% of the way to the right replacement.
For OEM vs aftermarket: ES Windows parts like replacement sashes, balances, and weatherstripping should come from ES Windows or an authorized distributor. The frames are designed around those specific components, and generic aftermarket balances change the feel and wear pattern of the window. For installation accessories like flashing tape, sill pans, and sealant, we use name-brand products (GAF, CertainTeed) that meet or exceed ES Windows installation specs. You don’t need ES Windows-branded flashing; you do need flashing that passes Florida’s wind-driven rain standards.
Bradford Remodeling Co Jacksonville is an independent service provider. We are not affiliated with ES Windows, and we don’t claim to be. We install and service their products because we know the specifications cold, and because Jacksonville homeowners keep asking us to fix installations that were done wrong the first time.
Styles & brands we work with
Signs Your ES Windows Home Additions & ADU Is Failing
When an ES Windows installation fails, it’s rarely the window itself. It’s almost always the integration: how the window was set into the wall. Here’s what we find in Jacksonville additions and ADUs when we get called in for repairs:
- Water staining under the window or at the drywall corners. This usually means the flashing tape was lapped wrong, or the sill pan was skipped entirely. Jacksonville gets 50-plus inches of rain a year, and a driving rain against an east-facing wall will find that gap within the first season.
- Sash sticks or won’t close square. The rough opening wasn’t shimmed at the four corners, so the frame twisted when the screws went in. It’ll get worse in summer when the vinyl expands, and it’ll never seal right.
- Caulk bead is cracked and pulling away within the first year. Either the wrong sealant was used (silicone over silicone works; silicone over latex doesn’t) or the window wasn’t bedded properly. Water gets behind it and sits against the sheathing.
- Condensation between the glass panes in an impact-rated 700 Series. That’s a failed seal in the insulated glass unit, and in a humid climate like Jacksonville it’ll fog every single morning. IGUs on ES Windows are warrantied differently by series, so check your paperwork.
- Drafts around the frame even when the sash is locked. The rough opening was too big or the insulation around the frame was stuffed instead of cut to fit. A properly set ES Windows frame reads tight around all four edges, with no visible gaps behind the trim.
If you’re seeing any of these in an addition or ADU built in the last few years, don’t ignore it. Water intrusion in Jacksonville doesn’t dry out on its own. It sits in the wall cavity, and within a season or two you’re looking at rotted sheathing, mold on the insulation, and a repair bill that’s triple what the window fix would have been.
See the difference
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After
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AfterReplacement Cost & What’s Included
For a full home addition or ADU in Jacksonville with ES Windows specified, the installed project cost ranges from $45,000 to $130,000. The window package itself is a fraction of that, but the window and door installation labor, flashing materials, and rough opening corrections are where the cost gets real. For a straightforward window replacement in an existing addition, the installed cost runs $4,500 to $15,000 depending on window series, size, and whether we’re cutting into stucco or lap siding.
What drives the price range on a full addition: square footage, foundation type (slab-on-grade vs raised), roof tie-in complexity, number of window and door openings, and whether the ES Windows specified are impact-rated (700 Series) or standard (300/500 Series). Impact-rated windows run 30% to 50% more than the non-impact equivalent, and in Jacksonville they’re sometimes required by code depending on the wind zone and elevation of your lot.
Every Bradford Remodeling job gets a written price before any work starts. That price includes the window units if we’re supplying them, all installation hardware, flashing, sealant, trim, and the labor to set and seal every opening. If we find rot or framing damage when we open the wall, you’ll know what the repair costs before we proceed. No line items appear at the end that weren’t in the original scope.
All completed work is covered by the 365-Day Done Right Promise: if the installation fails within the guarantee period, we come back and correct it at no charge. That’s in writing, signed by Curtis Lane, and handed to you at job close.
DIY or Call Us?
There are things an owner can safely check: whether the weep holes at the bottom of the frame are clear of stucco or paint, whether the caulk bead is intact, whether the sash locks engage properly. Those are maintenance items, and doing them yourself is fine.
What we don’t recommend is pulling an ES Windows unit from an existing opening and resetting it yourself if the framing is compromised or the flashing failed. The window unit itself weighs more than it looks like it weighs, especially a 700 Series impact model. Getting it out is one thing. Getting it back in square, with the shims right, the sill pan lapped correctly, and the flashing sequenced so water sheds outward instead of into your wall, is a different skill set. We get at least a couple calls every year from a Jacksonville homeowner who got the window out, got it halfway reinstalled, and then realized the rough opening was the problem all along.
Scope it right the first time – the job goes a lot smoother when nobody’s surprised. If you’d rather have a written price and a crew that knows ES Windows installation specs, call (904) 337-5929. We’ll walk the site, measure every rough opening, and give you a line-by-line quote.
FAQs
In Jacksonville’s heat and humidity, a properly installed ES Windows vinyl series (300 or 500) will last 20 to 30 years on the frame and 15 to 20 years on the seals and moving hardware. The 700 Series impact models run longer on hardware because they use heavier extrusions, but the weatherstripping still wears with Florida sun exposure and heavy use. If your windows were installed correctly with proper flashing and sealant, the window should outlast the caulk by a decade.
It depends on the part. A fogged insulated glass unit can often be replaced without pulling the entire frame, although the labor isn’t much less than a full replacement in some cases because the sash has to come out and be reglazed. A broken balance or worn weatherstripping is a simple repair. If the frame itself is warped or the nail fin is pulling loose from the wall, replacement is usually the more honest answer. Call (904) 337-5929 and we’ll tell you which one you’re looking at.
For a standalone window replacement in an existing opening, a two-person crew can usually set and seal one window in a day, including trim and cleanup. For a full home addition or ADU with multiple window and door openings, the window installation is scheduled as a phase within the larger project, which typically runs 3 to 8 months depending on scope. We’ll give you a dated schedule in writing before we start.
We stock common installation hardware, flashing, sealants, and shims on our trucks. ES Windows units and replacement components are ordered per project to match the series and glass size, with lead times typically running 2 to 6 weeks depending on the series and whether it’s impact-rated. We’ll give you the lead time in writing when we quote the job, and we coordinate the delivery so the windows don’t sit on your job site gathering dust.
If you’re planning a home addition or ADU in Jacksonville and you want ES Windows installed right, call (904) 337-5929 for a free estimate. We’ll show up when we say we will, measure everything, and put a written price in your hand before any work starts.
Written by Curtis Lane, Owner, Bradford Remodeling Co Jacksonville at Bradford Remodeling Co Jacksonville, serving Jacksonville and nearby areas.
