The Company Behind the Brand
ES Windows is the residential brand of Tecnoglass (NYSE: TGLS), a vertically integrated glass and window manufacturer that has become the most disruptive force in the Florida impact window market in the past decade.
The story starts in 1984 when brothers José Manuel Daes and Christian Daes founded EnergÃa Solar in Barranquilla, Colombia, making solar water heaters. The company pivoted to glass fabrication in 1994 as Tecnoglass. In 2013, they became the first Colombian company listed on NASDAQ. By 2021-2022, ES Windows had captured enough market share to become the #1 selling manufacturer of hurricane windows in Florida by volume, overtaking PGT, which had held that position since the industry's founding.
How did a Colombian company overtake the American manufacturer that invented the product category? Vertical integration and timing.
The Vertical Integration Advantage
Tecnoglass operates from a 5.3 million square foot integrated manufacturing complex in Barranquilla through three divisions:
- Tecnoglass: Glass processing (cutting, tempering, laminating, insulating, Low-E coating). Operates a dedicated $50 million Soft Coat Low-E MSVD plant with 8 million square meters/year capacity.
- Alutions: Aluminum extrusion, smelting, painting, anodizing. 500+ tons/month press capacity. 1,500+ processed tons/month paint capacity. Supplies 90%+ of all raw aluminum materials.
- ES Windows: Window and door assembly, the residential brand.
This means Tecnoglass does their own aluminum extrusion (most manufacturers buy from third parties like Eastern Metal Supply), their own glass processing (most manufacturers buy laminated glass from Cardinal or other suppliers), and their own assembly. The vertical integration eliminates supply chain dependencies and margin stacking at every tier.
The financial result: Tecnoglass achieved 42.8% gross margins in FY2025, compared to approximately 24% for Apogee and 16% for JELD-WEN. That structural cost advantage is what enables the ~20% price discount to PGT while maintaining extraordinary profitability.
The COVID Moment
ES Windows' market share breakthrough came during the 2020-2022 COVID-era supply chain crisis. While PGT and other domestic manufacturers faced raw material shortages, labor constraints, and lead times extending to 6-8 months, Tecnoglass's in-house supply chain (own aluminum, own glass, own interlayer processing) kept delivering in 5-6 weeks.
For installers and homeowners who needed windows, the choice was simple: wait 6-8 months for PGT or get comparable quality from ES in 6 weeks. Thousands of projects switched, and many never switched back. ES Windows' market share gains have proven sticky because the products perform as well as the competitors' at a lower price with faster delivery.
FY2025 revenue: $983.6 million. 2026 guidance: $1.06-$1.13 billion. The company was named to Fortune's 100 Fastest-Growing Companies (#27) in 2024.
Product Lines
Elite Line (Workhorse)
This is the product we install most frequently from ES Windows. The Elite line covers the standard residential range with strong specifications at a price point approximately 20% below PGT WinGuard.
Frame depth: 2-15/16"
| Product | Configuration | DP Rating | Notable Features |
|---|---|---|---|
| ES-EL100 (Single Hung) | Standard residential | +80/-80 PSF | Max size 53-1/8" x 76" |
| ES-EL150 (Fixed/Picture) | Non-operable | +80/-80 PSF | Max size 60" x 108" |
| ES-EL200 (Horizontal Roller) | XO, OX, XOX | +80/-80 PSF | Sliding configurations |
| ES-5000 (Casement) | Crank-operated | +80/-80 PSF | Single-arm operator, multi-point lock |
| ES-EL300 (French/Swing Door) | Single or double | Impact-rated | 1-3/4" panel depth, integrated sidelites |
| ES-EL400 (Sliding Glass Door) | Up to 4 tracks | +80/-80 PSF | Up to 8 operable panels |
Thermal performance: U-factor 0.64 (laminated single-pane); SHGC 0.23. The SHGC of 0.23 is among the best in the industry, meaning less solar heat enters your home.
What's included standard (no upcharge):
- Kynar/Dynar premium powder coating (superior UV and salt-air resistance for 25+ years)
- Low-E coating with tint (spectrally selective, reduces solar heat gain)
- Heat-strengthened glass (2x the strength of annealed, better post-breakage interlayer adhesion)
- Stainless steel hardware (corrosion-proof in coastal salt air)
- Reinforced frames
This is the critical competitive difference. PGT charges 10-15% extra for equivalent Low-E options, and premium finishes (Kynar equivalent) and stainless hardware are add-on upcharges. When comparing ES Elite to PGT WinGuard quotes, ensure both quotes specify the same glass configuration and finish level. ES's "base" price includes what PGT considers upgrades.
HVHZ approval: Yes. Broad Miami-Dade NOA coverage.
Prestige Line (Premium)
The Prestige line is ES Windows' answer to WinDoor for premium residential and architectural applications.
Frame depth: 3"
| Product | DP Rating | Notable Features |
|---|---|---|
| Casement/Awning/Fixed (ES-P300) | +80/-90 PSF (impact) | Higher DP than Elite for larger openings |
| Frameless Butt Glass (ES-FX3050) | Impact-rated | No vertical aluminum profiles; panels up to 5'W x 12'H; 90-degree corner configurations |
| Jumbo Fixed Window (ES-8000T) | Impact-rated | 7' x 15' (105+ sq ft) â the largest single-pane impact window on the market |
Thermal performance: U-factor 0.295; SHGC 0.355.
The ES-8000T Jumbo Fixed Window deserves specific attention. At 7 feet wide by 15 feet tall (105+ square feet of glass in a single panel), it is the largest single-pane impact window available from any manufacturer. For homes with floor-to-ceiling glass walls, Sarasota School mid-century modern architecture, or waterfront properties where the view is the design centerpiece, the ES-8000T provides a visual scale that no other residential impact product can match.
The ES-FX3050 Frameless Butt Glass eliminates visible vertical aluminum mullions between panels. The glass panels are bonded edge-to-edge with structural silicone, creating a near-seamless glass wall. Available with 90-degree corner configurations for wrap-around glass walls. This product competes directly with WinDoor's Estate line at a lower price point.
AAMA AW-PG100 certified.
Commercial Line
ES Windows offers commercial products (Models 500Y, PH-4400) with DP ratings up to +100/-140 PSF (large and small missile). Frame depths 3-1/2" to 4-3/16". These serve high-rise, commercial, and institutional projects but are outside the scope of most residential installations.
Vinyl Line (Early Stage)
ES Windows launched a vinyl impact window line in November 2023, entering a market segment they had never served. FY2025 vinyl revenue was approximately $10 million. Tecnoglass management characterized it candidly: "Vinyl has been a challenge because we got into a business that we didn't know."
Expected growth: 2.5-3x in 2026. The vinyl line is still maturing. For homeowners considering vinyl vs. aluminum and wanting ES Windows, the vinyl products are available but the aluminum Elite line remains the proven, established option. For HVHZ-approved vinyl specifically, PGT WinGuard Vinyl (DP +65/-70) and EAS Bertha are the more established choices.
What We See in the Field
Strengths
Value proposition is genuine. The ~20% savings over PGT is real and consistent across project sizes. On a 15-window project, that's $3,000-$6,000 in savings. The premium features (Kynar, Low-E, stainless) that PGT charges extra for are included in ES's base price. When we present side-by-side quotes with matched specifications, ES wins on price every time.
Delivery speed is a real advantage. 5-6 weeks from order to delivery is the fastest among major manufacturers. PGT quotes 10-12 weeks. WinDoor quotes 12-16. For homeowners trying to complete projects before hurricane season (June 1), this difference determines whether the project finishes in May or August.
Low-E performance is excellent. ES Windows operates their own dedicated Soft Coat Low-E MSVD plant (a $50 million facility inaugurated in 2015 with 8 million sq m/year capacity). Their proprietary process allows gray and bronze tints to remain "truer to color" than competitors' processes, which tend to shift tint appearance. For homeowners who want tinted Low-E glass that looks natural rather than blue-shifted, ES delivers noticeably better color rendering.
Kynar/Dynar finish durability. After years of ES installations in coastal South Florida (including barrier islands with severe salt exposure), the Dynar finish holds up. We see less chalking and color shift on ES frames at 5-7 years than on competitor frames with standard powder coating at the same age. The premium finish included standard is a genuine long-term value.
Financial stability. As a NYSE-listed company with nearly $1 billion in revenue and industry-leading margins, Tecnoglass is not going away. For homeowners concerned about long-term warranty backing, a publicly traded manufacturer with transparent financials provides more certainty than smaller private companies.
Honest Limitations
Narrower product range than PGT. For a complex home with arched windows, unusual shapes, and many different window types, PGT's broader catalog may offer configurations that ES doesn't have. ES excels at standard and large-format residential, but highly custom architectural projects may find more options at PGT or WinDoor.
Vinyl line is immature. ES acknowledged this publicly. If you specifically want vinyl impact windows, PGT WinGuard Vinyl or EAS Bertha are more established choices today. ES's vinyl offering will improve (they're investing heavily), but it's not their strength in 2026.
Glass warranty is shorter. ES covers movable parts for 25 years and stress cracks for 3 years. PGT covers laminated glass for 10 years. If glass warranty length is a significant decision factor, PGT has the edge. In practice, impact glass failures are extremely rare from any manufacturer, but the warranty difference exists.
Tariff exposure. As a Colombian manufacturer, Tecnoglass is directly exposed to U.S. trade policy. Section 232 tariffs (10% on finished aluminum window imports) took effect in 2026. Tecnoglass cut EBITDA guidance by approximately $50 million and responded with price increases on orders from May 2026. They're investing $350-$400 million in U.S. manufacturing capacity for a dual-platform model (Colombia + U.S.) to mitigate future tariff risk, but the near-term cost impact is real. ES Windows products are likely to increase by 5-6% in 2026.
Brand recognition gap. "PGT WinGuard" is a known quantity in the Florida real estate market. "ES Windows" or "Tecnoglass" has less consumer awareness despite being the #1 seller by volume. This matters at resale: a home inspector or buyer may not recognize the ES brand, which could theoretically affect their perception of value. This gap is narrowing as ES's market share grows, but it exists today.
ES Windows vs. the Competition
| Factor | ES Windows Elite | PGT WinGuard | ECO | WinDoor |
|---|---|---|---|---|
| Price | ~20% below PGT | Mid-premium (baseline) | Lowest | Highest |
| Max DP (aluminum) | +80/-80 (Elite), +80/-90 (Prestige) | +90/-130 | +105/-115 (SGD 760) | +125/-150 |
| Low-E standard | Yes | Upcharge | No | Varies |
| Premium finish standard | Yes (Kynar/Dynar) | Upcharge | No | Yes |
| Stainless hardware | Yes | Optional | Optional | Yes |
| Lead time | 5-6 weeks | 10-12 weeks | 4-8 weeks | 12-16 weeks |
| Largest SGD | Up to 4 tracks, 8 panels | 5'W x 10'H, up to 40 ft/8 panels | Up to 4 tracks | 5'W x 12'H, up to 5 tracks |
| Largest fixed window | 7' x 15' (ES-8000T) | 42 sq ft (architectural) | Standard | Large |
| Vinyl impact line | Launching (early) | Yes (DP +65/-70, HVHZ) | No | No |
| Glass warranty | 3 yr (stress cracks) | 10 yr (laminated glass) | Varies | Varies |
| Revenue | ~$984M | ~$1.5B (2023) | Smaller | Part of MITER |
| Ownership | Tecnoglass (NYSE) | MITER Brands (Koch) | Independent | MITER Brands (Koch) |
When to Choose ES Windows
- Best features-per-dollar is your priority (Low-E, Kynar, stainless included at 20% below PGT)
- Delivery speed matters (5-6 weeks vs. 10-16 for competitors)
- Standard to large-format residential applications (Elite and Prestige cover the vast majority of residential projects)
- Largest possible glass panels (Prestige ES-8000T and Frameless Butt Glass are unmatched)
- Coastal projects where Kynar/Dynar finish and stainless hardware are essential (included standard, not an upgrade)
When to Consider Alternatives
- Broadest product selection needed: PGT for complex homes with many window types and custom shapes
- Budget is the #1 priority: ECO is cheaper (though without premium features standard)
- Luxury/extreme DP: WinDoor for +125/-150 PSF and 12-foot SGD panels
- Vinyl impact (HVHZ): PGT WinGuard Vinyl or EAS Bertha are more established
- Brand recognition at resale: PGT has stronger consumer awareness (though ES is closing the gap)
Our Recommendation
ES Windows Elite is our go-to recommendation for homeowners who want the best value in the Florida impact window market. The math is simple: you get premium features (Low-E, Kynar, stainless) that competitors charge extra for, at a base price that's 20% lower, with the fastest delivery in the industry.
For premium/architectural projects requiring the largest available glass panels or frameless glass wall systems, the Prestige line competes with WinDoor at a meaningfully lower price point.
The limitations (narrower catalog than PGT, immature vinyl line, shorter glass warranty, tariff risk) are real but don't outweigh the value proposition for the majority of residential projects. We install ES Windows alongside products from all major manufacturers and recommend based on each project's specific requirements.
Next Steps
- Get a free estimate with ES Windows Elite alongside other manufacturer options so you can compare matched specifications and pricing.
- Verify the specs are matched when comparing quotes. ES's base price includes Low-E, Kynar, and stainless that PGT charges extra for. Ensure you're comparing apples to apples.
- Factor in delivery timing. If you need to finish before hurricane season (June 1), ES's 5-6 week delivery provides significantly more scheduling flexibility than PGT's 10-12 weeks.
- For the complete manufacturer landscape, see our manufacturer comparison and PGT review.
- Check MSFH eligibility for grants up to $10,000 toward impact windows from any manufacturer.
