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
AfterTherma-Tru Energy-Efficient Windows in Lantana: What to Know First
As an independent Therma-Tru service provider in Lantana, we install and replace energy-efficient Therma-Tru windows with written prices delivered before any work starts, typically completing measured surveys within 48 hours of contact. Our crews handle Therma-Tru’s Low-E and insulated glass configurations specifically, not generic inserts, and every quote is the same document you keep from survey to final invoice. This page is for Lantana homeowners who own Therma-Tru windows and need to lower cooling loads, replace failed seals, or upgrade to current ENERGY STAR performance without switching brands. Call (561) 461-2062 to schedule your free measured survey.
How Therma-Tru Products Fail - and How We Fix Them
- Classic-Craft and Fiber-Classic sash seal degradation in Lantana’s salt air. The closed-cell foam weatherstripping on these entry door sidelights and transoms hardens faster within two miles of the Intracoastal than inland specs predict. We replace with silicone bulb gaskets rated for marine-zone UV exposure, not the standard catalog part, and document the shore-zone specification on your work order.
- Low-E coating oxidation on early-2010s Therma-Tru patio door glass. Units manufactured before 2016 with soft-coat Low-E show haze patterns starting at the edge seal, visible when backlit from the east morning sun. We source replacement IGUs with warm-edge spacers and dual-seal construction, and we mark the original serial number on your photo record for warranty tracking.
- Argon loss in Therma-Tru double-hung vinyl windows without indicator breaches. The capillary breather tubes on certain Vented series units allow gradual pressure equalization that reads as fogging but shows no broken seal. We test with a Sparklike handheld argon meter on site, replace only failed lites, and specify whether the replacement IGU carries the original 20-year or a prorated aftermarket seal warranty.
- Frame expansion stress cracks in Therma-Tru impact-rated vinyl lines. The reinforced master frames on Impact Plus series develop corner separation when original installers over-torqued mounting screws through the thermal break. We remove the unit, sleeve the rough opening with PVC trim board to isolate the frame, and rehang with torque-limited fasteners, documented in the photo record.
- Interlayer yellowing in Therma-Tru laminated impact glass near the Lantana beachfront. The PVB interlayer in coastal Impact units degrades from combined UV and salt-air intrusion at the edge bite, starting at the bottom rail where condensation collects. We specify SentryGlas ionoplast interlayer on replacement IGUs for south- and east-facing openings, note the upgrade on your written quote, and flag the orientation in our file for future service reference.
Our Therma-Tru Energy-Efficient Windows Process
- 1
Measured survey with thermal imaging. We arrive with a FLIR camera, document surface temperatures at each Therma-Tru unit, and record frame readings you keep. Sonia Raman reviews the sightline measurements against the original rough opening before any quote is written.
- 2
Serial number verification and warranty status check. We photograph the Therma-Tru label, note the manufacturing date and IGU code, and confirm whether the unit falls under original or extended coverage. This determines if OEM glass is cost-effective or if a quality aftermarket IGU with equivalent U-factor and SHGC is the practical choice.
- 3
Written quote with performance specifications. The quote names the exact U-factor, SHGC, and visible transmittance of the proposed replacement glass, the seal type, and the spacer material. Haven Clause 1: the price on this document is the price on the final invoice.
- 4
Installation with torque and seal verification. Our uniformed, background-checked technicians install per Therma-Tru’s published clearances, seal the exterior perimeter with backer rod and silicone, and test operable units for sash drop and lock engagement.
- 5
Post-installation testing and photo record. We re-scan with thermal imaging, photograph the completed installation from interior and exterior, and upload the dated record to your file. Measure it right the first time. Everything after that is just paperwork.
- 6
365-Day Done Right Promise activation. The Haven Standard warranty is stamped on your completion document, not offered verbally. If the thermal performance or seal integrity fails within one year, we return and correct it at no charge.
BeforeAfterWhat Therma-Tru Energy-Efficient Windows Costs in Lantana
| Service | Typical Range | What Moves the Price |
|---|---|---|
| Single IGU replacement (Low-E/argon, standard size) | $340-$520 | Grille pattern, tempered requirement, impact rating |
| Double-hung sash replacement with balance hardware | $680-$1,150 | Unit size, jamb liner condition, exterior trim repair |
| Patio door IGU replacement (sliding or hinged) | $890-$1,480 | Panel size, interlayer type, roller/track condition |
| Full-frame replacement, impact-rated vinyl | $1,850-$2,900 | Opening size, stucco repair, permit requirements |
| Whole-home IGU audit and prioritized replacement plan | $180-$290 (audit) | Number of units, access difficulty, staging needs |
Impact-rated glass, warm-edge spacers, and SentryGlas interlayer upgrades add 15-30% to base IGU pricing. We itemize each on the written quote. Call (561) 461-2062 for your free measured survey; the written price we leave is the price you pay.
Why Lantana Homeowners Call Sightline Windows & Doors Lantana for Therma-Tru Work
We are independently owned and operated under the Haven Standard, not a franchise, and we have logged work on Lantana homes along the beachfront corridor where salt air and hard summer storms test every seal. Our technicians carry license numbers on their uniforms, and every job leaves a documented photo record. If we find a Therma-Tru unit is discontinued or the lead time exceeds your needs, we specify equivalent performance from PGT, CGI, CWS, or ES Windows with the same U-factor and SHGC, never a downgraded substitute. The 365-Day Done Right Promise is written into every contract, not extended as a courtesy. Since 2012, we have installed and serviced 18,000+ openings, every one with a written price before work started.
FAQs
No, if the repair uses OEM-specified parts and a qualified technician performs the work, but Therma-Tru’s warranty on glass seal failure is time-limited and prorated after year ten. We verify your manufacturing date and coverage status during the measured survey, document both on your quote, and specify whether OEM or quality aftermarket parts are the cost-effective choice for your unit’s remaining coverage. Call (561) 461-2062 to schedule a free review of your warranty status.
We match the solar heat gain coefficient and U-factor to within 0.02 of the original specification, which is closer than visual tint matching and more important for energy performance. Therma-Tru has shifted coating suppliers twice since 2012, so exact visual match is not always possible; we note the specification equivalence on your written quote and show you the sample under Lantana’s daylight before ordering. Call (561) 461-2062 to see the sample set.
If the frame is square, the hardware operates smoothly, and the fogging is limited to the insulated glass unit, we replace the IGU only, saving 40-60% over full-frame replacement. We test frame deflection and sash drop during the measured survey, show you the readings, and write the recommendation with both options priced. Call (561) 461-2062 for the survey and written comparison.
IGU replacement on an in-stock size requires two hours on site; custom-ordered IGUs arrive in 10-14 business days, with installation scheduled the day after delivery. We do not quote turnaround we cannot verify with the supplier, and we update you if the lead time shifts. Call (561) 461-2062 to check current availability for your Therma-Tru series.
Yes, for full-frame replacements and any work affecting the egress opening size or impact rating; IGU-only replacements typically do not require permitting. We verify Palm Beach County requirements for your specific address during the measured survey, include permit costs itemized on the written quote when applicable, and schedule inspections as part of the project scope. Call (561) 461-2062 to confirm whether your job requires a permit.
Written by Sonia Raman, Owner, Sightline Windows & Doors Lantana at Sightline Windows & Doors Lantana, serving Lantana and nearby areas.