Verified from the manufacturer’s own documentation · last checked September 19, 2026
| Manufacturer | Windsor |
|---|---|
| Series | Pinnacle |
| Frame material | Aluminum-clad wood. Heavy-duty 0.050-inch extruded aluminum exterior (thicker than roll-form cladding) with a wood interior in Clear Select Pine, Natural Alder or Douglas Fir. Powder-coat finish: standard 2604, upgraded 2605 available. Optional Textured Black contemporary finish |
| Styles / configurations | Casement, awning, double-hung, single-hung, glide-by (slider), picture / direct set, geometric shapes; also multi-slide, bi-fold, swinging (in-swing / out-swing) and bay/bow patio doors. Contemporary options with slimmer profiles and expanded glass openings. Confirm the current Pinnacle style range on Windsor's pages |
| Glass options | LoE-366 glass standard with a coating that reduces heat loss in winter, heat gain in summer and UV penetration. Super Spacer all-foam dual-seal moisture barrier. Optional argon fill. WindsorLite (WDL) simulated true divided lite (7/8" and 1-1/4" widths). Optional silicone and tape glazing method |
| U-factor | Not published as a single line-wide range; NFRC-certified performance follows the style and glazing package. Third-party listing example: Pinnacle Clad Glide-By with Low-E and argon at U-factor 0.35, SHGC 0.20, VT 0.46. Check the NFRC label on the exact unit quoted |
| SHGC | Not published as a single line-wide range; follows the glazing package. Check the NFRC label on the unit quoted |
| VT | Not publicly specified |
| ENERGY STAR | Windsor states Pinnacle meets or exceeds ENERGY STAR guidelines in all US zones with the Super Spacer package |
| NFRC certification | NFRC-certified performance follows the configuration; per-product performance data is published in Windsor's Pinnacle specifications |
| Warranty | Windsor Pinnacle Limited 20/10 Warranty (document #2370590, for Pinnacle products made after July 2023), transferable to later owners up to the warranty time limits. Insulated glass seal: 20 years (replacement glass only). Workmanship, hardware, weatherstrip and other parts: 10 years. Exterior aluminum finish: AAMA 2604 standard 20 years, optional AAMA 2605 upgrade 30 years; within 1 mile of the coast only AAMA 2605 is covered, for 10 years. Pine wood rot (WinSure treated): limited lifetime for the original owner-occupant of a single-family home, capped at 20 years from manufacture after a sale; fir and alder 10 years. Factory interior finish: 2 years. Laminated/impact glass delamination: 5 years. Labor, removal, installation and refinishing are NOT covered; parts ship to the nearest distributor. Claims within 30 days of discovery. Contains a binding arbitration agreement with jury-trial and class-action waivers; opt-out within 90 days of purchase |
| Positioning | Windsor's premium aluminum-clad wood collection — the flagship of Windsor's three residential lines (Pinnacle clad wood, Legend composite, Next Dimensions vinyl). Positioned as a solid mid-range option in the wood-window category, with true premium extruded cladding rather than roll-form. Windsor is a Midwest-based US manufacturer |
| Price position | Premium clad wood (mid-range in luxury tier) |
| Installation | New construction and replacement (residential); custom, made-to-order through Windsor's independent distributor network |
Notes
Aluminum-clad wood. Re-verified September 19, 2026 against Windsor's own Pinnacle warranty. Corrections: the arbitration opt-out window is 90 days (not one year) and the document contains a full arbitration agreement, not only jury/class waivers; added the WinSure lifetime pine wood-rot coverage and the coastal finish rule; confirmed transferability and the labor exclusion. The earlier record cited a 'Rev 7/2025' document that could not be found; the 7/2023 document is the one Windsor hosts. Windsor is a Woodgrain company. Performance data is style- and glazing-specific — check the NFRC label
Sources
Windsor Pinnacle Warranty PDF #2370590 (windsorwindows.com, effective for Pinnacle products made after 7/2023) for every warranty term, transfer rules, labor exclusion and arbitration terms; Windsor WinSure page for the pine wood-treatment lifetime coverage; Windsor Pinnacle Showcase Brochure (03-2025) for Clear Select Pine, Natural Alder and Douglas Fir interiors and LoE 366 glass