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XL Sterling Double Hungs - Traditional Goes Large

To address larger openings with traditional style, Kolbe introduces Ultra Series XL Sterling double hung windows, with sizes up to 48" wide x 120" high. This new product builds upon the performance, architectural characteristics, and design flexibility of Sterling double hungs.

Due to matching options, same sightlines and similar exterior profiles, the XL Sterling double hung works well in combination with Sterling double hungs in projects that require double hungs in a variety of sizes, while also making a statement of architectural elegance. Like other Ultra Series products, XL Sterlings present the warmth of wood on the interior with low-maintenance, extruded aluminum cladding, and durable finishes on the exterior. Options include exterior casings and nosings, a wide array of exterior colors and finishes, various wood species, interior prefinishes, performance divided lites, and more.

As evidenced in our Ultra Series Air-Water-Structural Test Reports Manual, XL Sterling double hungs have been designed and tested to offer superior performance in large sizes, with LC-PG60 ratings and options available to meet IPD4 impact certification for sizes of up to 48" wide x 120" tall. As a result, XL Sterling double hungs are a perfect fit for any oversized commercial or residential opening. Wood interior covers provide a clean, consistent appearance, and Class 5 balances help the larger-sized sash operate smoothly. Energy-efficient, insulating LoE²-270 glass is standard on XL Sterlings, with glass coating options to meet the conditions of specific climate zones.


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