Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
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Before
AfterTherma-Tru Custom & Geometric Windows in Three Lakes: What to Know First
As an independent Therma-Tru service provider in Three Lakes, we install and replace custom and geometric windows from Therma-Tru’s complete line, with most measured surveys scheduled within 48 hours and installation typically completed in one day for standard openings. Our written quote is the same document as our measured survey - Haven Clause 1 - so the price you approve is the price on the invoice, with no change orders. This page is for Therma-Tru owners in Three Lakes who need arched, curved, trapezoid, or oversized geometric windows installed correctly the first time, with documentation to prove it. Call (786) 808-5792 to schedule your free measured survey.
How Therma-Tru Products Fail - and How We Fix Them
- Classic-Craft arched top lights with seal decompression. The curved profile in the Classic-Craft line creates uneven pressure on the insulating glass unit during Three Lakes heat cycles. We’ve replaced dozens where the argon escaped and the low-E coating oxidized at the apex. We specify replacement IGUs with warm-edge spacers rated for South Florida’s thermal expansion range, not standard Midwest-spec units.
- Smooth-Star geometric sashes with corner joint creep. The welded corners on Smooth-Star trapezoid and pentagon units can separate 1/16 to 1/8 inch after repeated exposure to afternoon loading from the Killian Corridor sun. Our fix: we measure the diagonal variance, re-weld with PVC reinforcement where the frame allows, or spec a replacement sash when the sightline deviation exceeds 3/16 inch.
- Fiber-Classic curved units with delaminated skin. The fiberglass skin on Fiber-Classic radius windows can separate from the substrate near the curve’s tension side, especially on west-facing elevations in Three Lakes. We document the delamination depth with caliper readings, then either re-skin with OEM-compatible fiberglass mat or recommend full replacement when the structural core is compromised.
- Impact-rated custom units with failed laminated glazing. Therma-Tru’s impact geometric windows use laminated glass that can spider at the edge when the polyvinyl butyral layer degrades from UV exposure. We source replacement laminates that meet Miami-Dade Notice of Acceptance requirements - never generic “impact-resistant” glass that lacks the NOA documentation your insurer may request after a storm.
- Oversized fixed geometric windows with sill pan failure. Custom Therma-Tru picture windows over 60 inches wide in the DSA and DSE lines often show sill pan deflection where the original installer skipped end-dam integration. We remove the unit, install a continuous sill pan with mechanical end dams sealed to the rough opening, then reset the window to the measured survey spec.
Our Therma-Tru Custom & Geometric Windows Process
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Measured survey you keep. Sonia Raman or a verified crew member arrives with license number on record, measures every rough opening to 1/16 inch, notes plumb and square deviation, and documents existing frame conditions with dated photos.
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Written scope and price. We specify the exact Therma-Tru series, glazing package, and any custom shop modifications needed. The quote is the survey - same document, same numbers. You sign one page.
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Parts decision: OEM or verified equivalent. For current-production Therma-Tru lines, we source factory-direct when lead times allow. For discontinued profiles, we machine compatible components or specify PGT, CGI, CWS, or ES Windows units that match the sightline and performance tier without compromising the opening.
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Installation with live documentation. Crew installs per Miami-Dade fastening schedules, integrates flashing with existing weather barriers, and photographs each phase for the photo record you receive.
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Operational test and sign-off. We verify operation, check air infiltration with smoke pencil at common leak points, and review the photo record with you on-site.
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365-Day Done Right Promise activation. The Haven Standard warranty document is emailed before we leave, with Sonia Raman’s direct line for any follow-up.
Before
AfterWhat Therma-Tru Custom & Geometric Windows Costs in Three Lakes
| Scenario | Typical Range | What Moves the Price |
|---|---|---|
| Standard geometric replacement (trapezoid, pentagon, circle-top) | $1,400 - $2,800 per opening | Unit size, impact rating required, existing frame condition |
| Arched or curved custom unit, full frame | $2,200 - $4,500 per opening | Radius complexity, jamb depth, exterior trim matching |
| Oversized fixed geometric (over 72″ wide) | $3,800 - $7,200 per opening | Crane or specialty lift, structural header modification |
| IGU replacement in existing Therma-Tru geometric sash | $680 - $1,400 per unit | Low-E coating specification, argon fill, spacer type |
| Sill pan remediation with unit reset | $890 - $1,600 per opening | Subfloor access, flashing integration extent |
Every estimate is free, written, and itemized. Call (786) 808-5792 for your exact quote.
Why Three Lakes Homeowners Call Sightline Windows & Doors Three Lakes for Therma-Tru Work
We’ve served Three Lakes long enough to know which elevations cook and which catch the afternoon thunderstorms off the Killian Corridor. Sonia Raman reads a rough opening once, quotes it straight, and installs it right - nothing else belongs on the invoice. Our background-checked, uniformed technicians carry license numbers you can verify. The 365-Day Done Right Promise is stamped on every job, not offered as a courtesy. And because we specify across eight manufacturer lines - PGT, CGI, CWS, ES Windows, ECO Window Systems, Mr-Glass, Therma-Tru, and ViewLux - we can recommend the unit that fits the opening’s performance requirements and your budget, not whatever is in the warehouse.
FAQs
No - manufacturer warranties cover product defects, not who installs them, provided installation follows published guidelines. As an independent Therma-Tru service provider, we install to Therma-Tru’s written specifications and document every step. If a defect arises, you have the same factory claim path. Call (786) 808-5792 and we’ll review your warranty status during the free estimate.
Current-production Therma-Tru custom shapes typically ship in 4-6 weeks; discontinued profiles or special laminates can extend to 8-10 weeks. We verify lead times before you sign the scope and source from PGT, CGI, CWS, or ES Windows if schedule is critical. Call (786) 808-5792 for current availability.
Cracked laminated impact glass requires replacement of the insulating glass unit, not the entire frame, in 70% of the cases we see in Three Lakes. We measure the sightline, verify the sash is square within tolerance, and spec a replacement IGU if the frame is sound. Call (786) 808-5792 for a free assessment.
We stock common hardware and seal kits for current Therma-Tru lines at our Three Lakes facility, but custom geometric sashes and IGUs are factory-ordered to your opening’s measurements. For urgent weather sealing, we can install temporary protection while the custom unit is in production. Call (786) 808-5792 to discuss timing.
We replace the unit when frame distortion exceeds 3/16 inch, the sill pan has failed, or the cost of component repairs exceeds 60% of replacement. For everything else - IGU failure, hardware, weatherstripping - we repair and document. Call (786) 808-5792 for a measured survey and written recommendation.
Written by Sonia Raman, Owner, Sightline Windows & Doors Three Lakes at Sightline Windows & Doors Three Lakes, serving Three Lakes and nearby areas.