Kolbe's focus on craftsmanship and attention to detail means our products are ideal for historical replication projects. Our products are designed to provide traditional design aesthetics, ease of operation and optimal energy efficiency. There are numerous options to further restore the beauty of your project, including custom wood species, historical casing, and numerous divided lite possibilities.

Kolbe's Old World Classic double hung is the perfect window for historic renovation. A brass pulley system, complete with solid brass chains and alloyed weights, allows this unit to operate with incredible ease, due to the proportionate balance between the sash and weights. These units are custom-built for each project and are available in numerous wood species.

Kolbe's Sterling double hung is designed with traditional aesthetics and ease of operation in mind. The jambliners and block-and-tackle balances that help the window operate are completely concealed, providing a smooth interior and exterior appearance.