Rot is the silent destroyer of historic windows—but if you catch it early, you can avoid major rebuilds. Learn how to identify early warning signs, the best tools and treatments, and how Austin Historical restores wood windows with lasting results. Sometimes you best historic window solution is to repair a sash but sometimes it needs to be replicated.

Ever had a historic window slam shut unexpectedly? That’s likely a broken sash cord. In this post, we break down how sash cords, chains, and counterweights work—and how to restore them. Whether you're a DIYer or just curious, this guide will help you appreciate the elegant mechanics behind old double-hung windows.