E118: Preservation Over Replacement: Saving Century-Old Windows in Pittsburgh with Allegheny Designs

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What makes David Flannery with Allegheny Designs a good neighbor?

Ever wonder why those wavy-glass, wood-framed windows in older homes refuse to quit? We sit down with David Flannery of Allegheny Designs to uncover the surprising truth: the classic double-hung window was essentially perfected in the 19th century, built from dense old growth wood that shrugs off insects and weather, and designed for natural ventilation long before air conditioning. David shares how careful restoration- using spring bronze weatherstripping and traditional glazing putty- brings century-old sash back to life for another hundred years without sacrificing authenticity.

We dig into the myths pushed by the replacement window industry and explain why many modern units are a short-term fix compared to properly repaired originals. David walks us through what homeowners should look for, from failing putty to surface checks that seem scary but are often cosmetic. He also reveals how a simple airflow trick- raising the bottom sash and lowering the top- can cool a house and cut reliance on mechanical systems. Beyond the craft, we talk about the surge in demand, multiyear waitlists, and the growing, collaborative network of restoration pros across the country, including many women-led shops setting the standard for quality and mentorship.

You’ll come away with practical insight on preserving architectural character, improving comfort, and making smarter, more sustainable choices for your home. If you’ve ever faced the decision to replace or restore, this conversation offers a clear, values-driven roadmap. Listen now, then subscribe, share with a neighbor who loves historic homes, and leave a review so more people can find the show.

To learn more about Allegheny Designs go to:

https://www.alleghenydesigners.com/

Allegheny Designs

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