Cyprium Collection - Loewen Windows

Cyprium Collection

Loewen's Cyprium Collection combines millennia of heritage with modern technologies, creating a unique offering in the fenestration market. This esteemed product line boasts an artisan-applied patina on thick copper or bronze cladding. A combination of innovation and pure craft.

Copper & Bronze Fenestration

More Than Cladding

The Loewen Cyprium Collection features copper and bronze clad windows and doors. Besides being clad in copper and bronze, the design and construction of these windows and doors is unique when compared to the rest of our product line. The Cyprium collection is artisanal in detail, including hand-soldered exterior joints and rich, tactile depth of texture in the thick metal cladding and deep profiles. These hand-wrought living surfaces develop distinctive patinas that adopt and define the individual aesthetic character of the homes to which they belong.

Our Offering

  • Pushout, Rotogear, & Fixed Casement Windows
  • Pushout French Casement Windows
  • Pushout & Rotogear Radius-Top Casement Windows
  • Picture/Direct Set Windows (incl. Shaped Units)
  • Mulled Combinations
  • Swinging Terrace/French Doors (incl. Transoms & Camber Top Units)
  • LiftSlide Doors


  • Custom artisan-applied patina for accelerated aging
  • Common frame cladding and recessed mullions are architecturally correct and authentic
  • Thick copper and bronze cladding are rarely both offered from the same manufacturer
  • Authentic exposed solder joinery for water and structural integrity

Related Documents

Brochures and Technical Guides related to this product.

Cyprium Collection Technical Guide

Virtual Walk-Through

Watch the video.

The best way to get up to speed on our products is an in-person walk-through with one of our product experts. Since that’s not always possible, we’ve produced some videos to explain operation, features, and options.

Patinas, the living finishes that cloak copper and bronze, are as unique as their location. Patinas typically progress from their natural state, through earthy browns and finally settle into a distinctive verdigris green.

Bronze - Natura

Bronze Natura

Bronze - Umbra

Bronze Umbra

Bronze - Verdigris

Bronze Verdigris

Copper and bronze have an enduring place in architecture, a position that has lasted thousands of years. These building materials have adorned castles and cathedrals because of their beauty and durability. The Cyprium collection is artisanal in detail, including hand-soldered exterior joints, traditional recessed mullions, and hand-fit capped sill ends.

Soldered Joints

Lead-free hand soldered joints render an authentic appearance that is both attractive and functional. Soldered joints create a cohesive, watertight body for frame and sash members resulting in a uniform reaction to temperature fluctuation.

Recessed Mullion

Recessed from the face of the sill and frame, this classical mullion detail adds visual harmony. Cyprium’s deep sills are well suited to masonry wall construction.

Capped Sill End

Hand-fitted sill caps are soldered in place for structural integrity and a finished appearance.