The Simulated Double Hung (SDH) uPVC Valueline window from Zola Windows is the latest addition to its American Heritage line, a leading solution for landmarked and other historically significant buildings. Consistent with Zola’s high quality and unparalleled thermal performance, the SDH uPVC Valueline is designed with R-9 glass and comes in standard triple pane, offering a superior performance replacement window system at a value-engineered price.

Zola’s SDH uPVC Valueline is popular among high-performance commercial renovations and new construction in historic properties, creating entirely new possibilities. While traditional double hung windows slide up and down in their seals and therefore are not very airtight, Zola’s SDH uPVC Valueline uses two compression gaskets and high performance frame and glass to achieve outstanding thermal performance and air tightness.

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