Consistent with Zola's high quality and focus on thermal performance, the SDH uPVC Valueline comes in standard triple pane. The durable compression gasket system results in great air and water tightness. If you have even higher air tightness requirements, you can optionally add concealed hinges or a third seal layer. Photo 4 of 5 in McKeesport Downtown Housing by Zola Windows

McKeesport Downtown Housing

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Consistent with Zola's high quality and focus on thermal performance, the SDH uPVC Valueline comes in standard triple pane. The durable compression gasket system results in great air and water tightness. If you have even higher air tightness requirements, you can optionally add concealed hinges or a third seal layer.