ES Windows Home Additions & ADU Nationwide

ES Windows Home Additions & ADU: The West Palm Beach Owner’s Guide

ES Windows-compatible framing systems and impact-rated window assemblies for home additions and ADUs in West Palm Beach typically run $45,000-$130,000 installed, depending on square footage, foundation type, and whether the unit requires full kitchen and bath rough-ins. We stock ES Windows impact frames and hardware for same-day assessment on most series. Most West Palm Beach owners discover their addition’s window system is failing when they feel salt-air drafts around the frame perimeter or spot corrosion on the weep screed drainage channels after a storm season.

Call (561) 475-3903

Which ES Windows Models This Applies To

ES Windows manufactures three product lines relevant to residential additions and ADUs: the ES 8000 Series (non-impact, vinyl-clad), the ES Impact Series (aluminum-frame, Miami-Dade HVHZ-rated), and the ES Architectural Series (thermally broken, typically specified for second-story additions with large openings). The model number is stamped on the frame edge behind the interior stop, visible once you slide open a vent panel. The first two digits indicate the series; the suffix “-IMP” confirms impact rating.

For additions in West Palm Beach, we most commonly match the ES Impact Series because Palm Beach County requires HVHZ certification on any new exterior glazing. The OEM sash balance, tilt latch, and weep screed are proprietary to ES’s extrusion profile, but we also source quality aftermarket equivalents from Amesbury and Truth Hardware that mate correctly without voiding structural warranties. The compatibility gotcha: ES changed its frame depth from 2-5/8 inch to 2-3/4 inch in 2019, so pre-2019 additions need the older latch geometry or the sash won’t seat flush. We measure on-site before ordering anything.

Signs Your ES Windows Home Additions & ADU Is Failing

• Visible corrosion on the weep screed or sill nose. Florida’s salt air accelerates galvanic reaction where aluminum meets dissimilar metals; once the weep channels clog, water backs into the sub-sill and rots the framing below. In West Palm Beach, we see this most often on east-facing additions within a mile of the Intracoastal.
• Sash drift or failure to stay open. The coil balance spring loses tension after 8-12 years of thermal cycling; the sash creeps shut or slams shut unpredictably. This is a wear item, not a defect, but it stresses the tilt latches if ignored.
• Condensation between panes on impact-rated units. ES’s impact glass uses a laminated inner lite and tempered outer lite with a desiccant-filled spacer; seal failure admits moist air that the desiccant cannot absorb indefinitely. Once you see persistent fogging, the thermal and structural performance are compromised.
• Difficulty latching or visible gap at the meeting rail. The multi-point lock system relies on keepers that shift slightly as the vinyl or aluminum frame expands and contracts; after several years, the latch cam no longer draws the sash tight against the weatherstrip.
• Water staining on interior drywall below the window. This usually traces to failed end-dam seals or improper sill pan flashing during original installation, not the window itself, but the window must come out to correct the drainage plane.

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Replacement Cost & What’s Included

For a complete ES Windows assembly replacement in a West Palm Beach home addition or ADU, expect $45,000-$130,000 depending on whether we’re replacing fenestration within existing framed openings or building new square footage with integrated rough openings. A single ES Impact Series window unit, removed and replaced with proper sill pan, flashing tape, and foam sealant, runs $800-$2,400 per opening depending on size and floor height.

Every quote we write itemizes: the ES Windows unit or compatible aftermarket equivalent, labor for removal and disposal, sill pan and flashing integration, interior trim repair or replacement, and cleanup. Under Clause 1 of the Haven Standard, that written price is the price - no change proceeds without a signed change order. Our 365-Day Done Right Promise covers both the installation and the weatherseal performance; you also receive a documented photo record of the rough opening condition before we close the wall.

DIY or Call Us?

An owner can safely inspect: the weep screed for debris, the weatherstrip for cracking, and the model stamp location behind the stop. Do not attempt to remove an impact-rated sash yourself - the laminated glass weighs 8-12 pounds per square foot and the tilt mechanism is under spring tension. A dropped sash can shatter the laminate or sever fingers at the hinge pivot.

Structural integration matters more than the window itself. The Florida Building Code requires HVHZ-rated installation with specific fastening schedules and sill pan details that vary by wall type. We’ve corrected three West Palm Beach additions this year where the owner installed a compatible unit but missed the end-dam seal, channeling water into the sill plate. If you’re pricing the work, call (561) 475-3903 - we’ll review your situation and deliver a written estimate before any work starts.

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