Therma-Tru Custom & Geometric Windows Nationwide | Sightline Windows & Doors Doral

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

We provide independent Therma-Tru custom and geometric window service in Doral, from arched transom repairs to full curved-window replacements. Most Therma-Tru geometric jobs we handle in Doral run $890 to $4,200 depending on whether we’re re-glazing a shaped sash or replacing the entire insulated unit, and we put that price in writing before any work starts. Turnaround typically ranges from 5 to 14 days for standard shapes, with true custom geometries requiring 3 to 5 weeks for OEM fabrication.

Call (786) 460-1563

This page is for Doral homeowners who bought a Therma-Tru entry system with sidelites, transoms, or shaped windows and need service from someone who knows the difference between a Classic-Craft arched transom and a Fiber-Classic radius-top unit. If you’re seeing fog between the panes, frame separation at the mullion, or water intrusion at the sill of a geometric window, call us at (786) 460-1563 for a free written estimate.

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

• Classic-Craft arched transoms: The simulated divided lite (SDL) bars on these units delaminate from the thermal expansion cycling that Doral’s concrete-tile roofs amplify. Heat builds under the soffit, the bar adhesive creeps, and you get visible gaps that let water track behind the exterior grille. We remove the SDL assembly, clean the old butyl, and re-secure with OEM-compatible spacer tape rated for 180°F surface temps.
• Fiber-Classic radius-top sidelites: The pultruded fiberglass frame can separate from the insulating glass unit at the curved head jamb, especially on west-facing entries in Doral’s afternoon sun. The factory uses a flexible back-bed, but after 6 to 10 years the shore hardness increases and the seal fails. We cut back the old back-bed, re-set the IGU with neutral-cure silicone structural sealant, and re-flash the head with copper pan flashing that outlasts the vinyl alternatives most crews use.
• Smooth-Star geometric windows with Low-E coating degradation: The hard-coat Low-E on early Smooth-Star production (roughly 2015 to 2019) oxidizes visibly at the curved edges where the coating meets the spacer, showing a bronze haze that homeowners mistake for dirt. It is not cleanable. We source replacement IGUs with soft-coat Low-E and warm-edge spacers, which eliminates the edge effect and improves U-factor from 0.35 to 0.28.
• Impact-rated custom shapes (Therma-Tru impact line with Mr-Glass or PGT IGU supply): The laminated interlayer can bubble at the radius points of quarter-round or half-round units, particularly where Doral’s code-required large-missile impact glass meets the tighter curvature. This is a fabrication stress issue, not an install problem. We coordinate with the original IGU supplier for a re-laminate under warranty when possible, or spec a replacement with adjusted heat-soak parameters if the warranty period has closed.
• Oversized Therma-Tru openings with factory mullion kits: The mullion post between a door and a tall sidelite, or between paired geometric units, carries more load than the individual window specs suggest. In Doral, where the fill soil settles differentially under slab-on-grade construction, we see mullion twist that fractures the corner keys. We sister the mullion with aluminum reinforcement, re-shim to plumb, and document the before-and-after laser level readings for the customer’s file.

Our Therma-Tru Custom & Geometric Windows Process

1. 1
   Measured survey. Sonia Raman or a verified crew member arrives with a laser measure, moisture meter, and camera. We record rough opening dimensions, sightline clearances, and any out-of-square conditions to 1/16 inch. You keep a copy of this survey; it becomes the basis for the written quote.
2. 2
   Diagnostics and parts identification. We identify the Therma-Tru series, production era, and whether the IGU, sash, or full frame requires attention. For discontinued geometries, we check aftermarket suppliers against OEM availability and present both options with lead times.
3. 3
   Written price before work starts. Haven Clause 1: the quote matches the measured survey exactly. No line item changes without a second written amendment signed by both parties.
4. 4
   Installation by verified crews. Haven Clause 3: background-checked, uniformed technicians with license numbers provided in advance. For Therma-Tru geometric work, we assign crew members who have completed curved-IGU handling training.
5. 5
   Testing and documentation. We operate the unit through full travel, check seal integrity with a smoke pencil, and photograph the completed work. The photo record uploads to your customer portal within 24 hours.
6. 6
   365-Day Done Right Promise activation. The warranty document references the original measured survey, the written scope, and the photo record. If anything drifts, we return and correct it.

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What Therma-Tru Custom & Geometric Windows Costs in Doral

These are Doral-market prices for 2024-2025, based on our completed jobs in neighborhoods from Doral Isles to the commercial conversions near Downtown Doral. Every estimate is free, written, and itemized. Call (786) 460-1563 to schedule yours.

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

We are an independent Therma-Tru service provider, not a factory-authorized dealer, which means we source parts based on what your opening needs rather than what a single manufacturer has in regional stock. When Therma-Tru lead times stretch, we can cross-reference compatible IGUs from PGT, CGI, CWS, or ES Windows if the performance spec matches. The Haven Standard governs every job: written price first, verified crew, evidence on every visit, no surprises. Sonia Raman’s crew has worked Doral properties from Beacon Lakes to the NW 87th Avenue corridor, and we have handled enough Therma-Tru geometries to know that the curved head jamb on a Fiber-Classic unit will test your patience if you didn’t measure the springline radius twice. Measure it right the first time. Everything else follows from that.

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