Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Before
After
Before
After
Before
AfterCGI Energy-Efficient Windows in North Palm Beach: What to Know First
We install and service CGI energy-efficient windows in North Palm Beach as an independent CGI service provider, with most measured surveys scheduled within 48 hours and written quotes delivered before any work begins. Typical CGI retrofits in our market run $340-$780 per opening for glass-and-sash upgrades and $1,200-$2,400 for full-frame replacements, depending on series and whether the rough opening needs correction. This page is for the CGI owner who has noticed rising utility bills, fading floors, or condensation between panes and wants to know whether the fix is a glazing swap or a full unit replacement. Call (561) 475-1246 to schedule your free measured survey. If the opening isn’t right, the window isn’t right - that’s where we start.
How CGI Products Fail - and How We Fix Them
- Sentinel by CGI (single-hung, 2008-2016 builds): argon depletion with no breach. These units lose gas through the spacer edge faster than laminated impact glass should, especially on west-facing elevations in North Palm Beach where afternoon thermal cycling is severe. We see U-factors climb from 0.30 to 0.38 before the homeowner notices haze. Our fix: pull the sash, test with a thermal imager to confirm the pattern, and replace with OEM or Cardinal IG unit with a stainless steel spacer - not aluminum - which holds gas longer in this climate.
- WinGuard Vinyl (double-hung, pre-2019): seal failure at the meeting rail. The interlock geometry on early vinyl profiles traps condensate during our August-September humidity spikes. The glass is fine; the frame is sweating into the air space. We disassemble the meeting rail, reseal with backer rod and silicone compatible with CGI’s vinyl compound, and pressure-test the unit before reinstallation. Full sash replacement is rarely needed.
- WinGuard Aluminum (fixed and casement): thermal break separation. The polyamide strip between aluminum extrusions degrades where salt air meets roof runoff, common in Lakeside Park homes with minimal overhang. The window looks intact but conducts heat at the frame edge. We document the thermal break condition with a photo record, quote frame replacement or full unit based on the degree of separation, and specify the post-2018 CGI thermal break profile if available.
- Impact-rated laminated glass: interlayer yellowing, not delamination. SentryGlas and PVB interlayers in CGI impact units yellow unevenly when UV exposure exceeds the Low-E coating’s blocking capacity, usually on south walls without awnings. The glass is still impact-rated; the energy performance is shot. We specify a double-silver Low-E with higher SHGC blocking - typically 0.19 instead of 0.25 - and verify the new glazing carries the same Miami-Dade NOA number as the original.
- Sparta single-hung (rental-grade installs): operator hardware stress on oversized sashes. Sparta units in North Palm Beach condos often have 36″ x 72″ sashes on single-point locks, and the vinyl flexes enough to break the weatherstrip seal under wind load. Energy loss follows air infiltration, not glass failure. We upgrade to multi-point locking hardware where the frame allows, or recommend stepping to WinGuard if the sash geometry supports it.
Our CGI Energy-Efficient Windows Process
- 1
Measured survey. Sonia Raman measures every opening herself on the first visit. We record rough opening dimensions, squareness, and frame condition; you keep the survey sheet.
- 2
Diagnostics. Thermal imaging for gas loss, smoke pencil for air infiltration, visual inspection of spacer edge and thermal break. We photograph everything.
- 3
Parts specification. OEM CGI sash or glass unit when available and warranted; quality aftermarket (Cardinal, TruLite) when lead time or cost makes sense. We name the manufacturer on the quote, not “comparable.”
- 4
Written quote. Haven Clause 1: the price matches the survey document. No line item changes without a second written amendment.
- 5
Installation. Verified crew arrives uniformed, license number provided in advance. Rough opening corrected if needed; we have rebuilt block openings in Lakeside Park where original construction was out of plumb by 3/4 inch.
- 6
Testing and documentation. Pressure test, thermal re-scan, photo record uploaded. 365-Day Done Right Promise stamped on the scope. You get the photos, the warranty, and the final invoice - identical to the quote.
Before
AfterWhat CGI Energy-Efficient Windows Costs in North Palm Beach
| Scenario | Typical Range | What Moves Price |
|---|---|---|
| Sentinel/Sparta sash-only glass replacement (Low-E + argon) | $340-$520 | Sash size, grid pattern, tempered requirement |
| WinGuard vinyl double-hung full sash replacement | $580-$780 | Meeting rail condition, hardware upgrade |
| WinGuard aluminum fixed-frame full replacement | $1,200-$1,850 | Thermal break damage, stucco repair, trim match |
| Impact laminated glass upgrade (double-silver Low-E) | $680-$940 | Interlayer type (SentryGlas vs. PVB), NOA verification |
| Rough opening correction (block frame, typical) | $400-$650 | Depth of correction, anchor type, waterproofing |
These ranges reflect what we have written on actual North Palm Beach quotes in the past 18 months. Every job is measured before priced; every quote is free. Call (561) 475-1246 for your written estimate.
Why North Palm Beach Homeowners Call Sightline Windows & Doors North Palm Beach for CGI Work
We are not a CGI dealer. We are an independent CGI service provider with eight manufacturer lines - PGT, CWS, ES Windows, ECO Window Systems, and others - which means if your opening is better served by a different product, we say so on the quote. Our crew has worked CGI units in North Palm Beach long enough to know that a 2014 Sentinel and a 2022 Sentinel are not the same window, and we stock hardware for both. The Haven Standard governs every job: written price before work, verified crew on arrival, evidence on completion, no surprises on the invoice. Since 2012, we have logged 18,000+ openings, every one with a photo record and a written scope the customer keeps.
FAQs
No. CGI’s product warranty covers manufacturing defects regardless of who installs or services the unit, provided the work does not alter the frame or glass in ways the manufacturer prohibits. We follow CGI’s published service guidelines for sealant compatibility, fastener torque, and glazing tape placement, and we document our work with photos in case a warranty claim arises. If your unit is still under CGI’s original warranty, we flag that on the quote so you can file any eligible claim. Call (561) 475-1246 and we will review your warranty status at no charge.
Glass-only replacement is viable when the frame is square, the thermal break is intact, and the failure is isolated to the insulated glass unit - haze, argon loss, or Low-E degradation. Full-frame replacement is necessary when the frame has shifted, the thermal break has separated, or the rough opening has settled out of plumb. We determine this during the measured survey with a level, thermal imager, and visual inspection of the spacer edge. Call (561) 475-1246 to schedule the survey; estimates are free.
We match the performance specification - U-factor, SHGC, and visible transmittance - to the degree that matters for your utility bill and comfort. CGI sources its coatings from multiple suppliers over time, so the exact stack may differ by production year. We specify the coating that meets or exceeds your original unit’s rated values, name the supplier on the quote, and verify the new glazing carries the appropriate Florida Product Approval or Miami-Dade NOA. Call (561) 475-1246 for the exact match on your series and year.
Glass-only sash replacements are usually completed in one visit of 2-3 hours per opening once parts arrive. Full-frame replacements require two visits: measured survey and installation, typically 4-6 hours per opening depending on stucco and trim repair. Parts lead time for current CGI series is 2-4 weeks; discontinued series may require 4-6 weeks or an aftermarket equivalent. We state the lead time on the written quote before you approve. Call (561) 475-1246 to check current availability for your series.
Yes, measurably, when the failure mode was air infiltration or degraded glazing. We have documented cases in North Palm Beach where replacing argon-depleted Sentinel glass with fresh Low-E/argon units reduced summer cooling load enough for the homeowner to notice within one billing cycle. The exact savings depend on how many units failed, your home’s orientation, and your HVAC efficiency. We do not promise a dollar amount we cannot verify. Call (561) 475-1246 and we will assess your specific situation during the free estimate.
Call (561) 475-1246 to schedule your free measured survey. We will bring the written price with us, and we will not start work until you have it.
Written by Sonia Raman, Owner, Sightline Windows & Doors North Palm Beach at Sightline Windows & Doors North Palm Beach, serving North Palm Beach and nearby areas.