Therma-Tru Custom & Geometric Windows Nationwide | Sightline Windows & Doors Lighthouse Point

Therma-Tru Custom & Geometric Windows in Lighthouse Point: What to Know First

We install and replace Therma-Tru custom and geometric windows in Lighthouse Point as an independent service provider, with most measured surveys completed within 48 hours of your call and written pricing delivered before any work is authorized. Our typical Therma-Tru custom opening runs $2,800 to $6,400 installed, depending on shape complexity, impact rating, and whether the existing frame can be preserved. We do not quote over the phone; Haven Clause 1 requires that the measurement and the written price be the same document.

Call (754) 600-8907

This page is for Lighthouse Point homeowners who already have Therma-Tru products and need arched, curved, geometric, or oversized custom windows installed or replaced, including impact-rated configurations. If you are comparing brands, we also specify PGT, CGI, CWS, and ES Windows by performance tier and price range. Call (754) 600-8907 to schedule your measured survey.

How Therma-Tru Products Fail - and How We Fix Them

• Classic-Craft arched top lights with seal decompression. The curved geometry of Classic-Craft arched units creates uneven pressure distribution across the insulated glass unit during Lighthouse Point’s summer heat cycles. We see the bottom of the arch lose its argon fill first, visible as interior condensation that wipes clean but returns. Our fix: deglaze the sash, measure the exact radius with a digital contour gauge, and reorder the IGU with a warm-edge spacer spec’d for the curvature.
• Smooth-Star geometric windows and frame creep in coastal exposure. Smooth-Star’s pultruded fiberglass composite resists rot but can exhibit micro-movement at miter joints in geometric configurations after years of salt-air cycling near the Intracoastal. The symptom is a visible hairline at the joint that does not leak yet but will. We disassemble, clean the joint, re-bed with structural urethane, and clamp to factory angle before the glazing goes back in.
• Therma-Tru oversized impact units with laminated lite delamination. Custom impact-rated geometric windows above 60 inches on the diagonal sometimes show edge delamination where the PVB interlayer separates from the glass under sustained wind-load cycling. This is not a crack; it is a hazy perimeter band that grows inward. We source the replacement lite from the original laminator when possible, or match the interlayer thickness and stiffness spec with a verified equivalent.
• Direct Set geometric shapes and sill pan failure. Direct Set windows without operable sashes rely on a continuous sill pan integration that many installers in the 2015-2020 window rush installed with generic flashing tape. In Lighthouse Point’s driving rains, the tape lifts at the radius transition. We remove the unit, install a formed aluminum sill pan with welded corners, and re-set with back-rod and structural sealant.
• Custom grille profiles with fastener corrosion. Therma-Tru’s applied grille systems on geometric windows use zinc-plated clips that corrode where the salt air concentrates at the muntin intersections. The grille loosens, then rattles, then scratches the IGU surface. We replace with 316 stainless clips and document the fastener spec in your photo record so the next tech knows what was used.

Our Therma-Tru Custom & Geometric Windows Process

1. 1
   Measured survey. Sonia Raman or a verified crew member arrives with a digital measuring board, contour gauge for radii, and a level to check frame square. You keep the survey document.
2. 2
   Diagnostic photography. We photograph every opening, every existing label, and every visible symptom. The photo record starts before we touch anything.
3. 3
   Parts specification. We determine whether OEM Therma-Tru components are available for your series and year, or whether a quality aftermarket equivalent meets the original performance spec without voiding remaining warranty coverage. You see both options in writing.
4. 4
   Written scope and price. The quote is the measured survey with line-item pricing attached. No separate document, no later change orders. Haven Clause 1.
5. 5
   Installation and real-time documentation. The crew photographs each stage: frame prep, flashing detail, unit set, and sealant application. You receive the complete record at final walkthrough.
6. 6
   365-Day Done Right Promise activation. The Haven Standard warranty is stamped and dated. If the operation, sightline, or seal is not correct, we return and make it right.

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What Therma-Tru Custom & Geometric Windows Costs in Lighthouse Point

What moves the price: impact rating versus non-impact, whether the original frame is square and dry, the complexity of the radius or angle cuts, and whether we are matching existing grille patterns or sightlines in a multi-opening wall. We do not estimate these by phone. Call (754) 600-8907 to schedule your free measured survey and written quote.

Why Lighthouse Point Homeowners Call Sightline Windows & Doors Lighthouse Point for Therma-Tru Work

We are independently owned and operated under the Haven Standard, not a franchise, and we have measured, fitted, and finished windows and doors across South Florida since 2012. Sonia Raman grew up in Miami, studied building construction technology at Miami Dade College, and has spent the better part of two decades on job sites from the canal-front properties near Lighthouse Point Marina to inland subdivisions. She knows that salt air and storm exposure here make product selection genuinely consequential, and she will tell you directly when a Therma-Tru spec is wrong for your exposure or when a PGT, CGI, CWS, or ES Windows equivalent performs better at the same tier.

Our technicians are background-checked, uniformed, and identified by license number before arrival. Calls are answered by a live person, 24/7. Every job leaves a documented photo record. And the 365-Day Done Right Promise is not a courtesy; it is Haven Clause 5, written into every scope. Measure twice, write it down, then we talk price.

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