FOR IMMEDIATE RELEASE
Bayshore, New York – April 2, 2026 – PRFire News has published an exclusive interview titled “Long Island Window Manufacturer Exposes Industry's ‘Replacement Window' Problem”, featuring Royal Windows & Doors President George Efthymiou detailing how widely used industry terminology is misleading Long Island homeowners into costly, improper window installations.
In the interview, Efthymiou explains that while homeowners use the term “replacement windows” to mean any new window installation, the industry uses it to describe a specific non-flanged insert product — one that is frequently inappropriate for the post-WWII homes that make up the majority of Nassau and Suffolk Counties. Most homes built in the 1950s through 1980s were constructed with flanged aluminum or vinyl windows, where a nailing flange around the perimeter creates a watertight seal against the wall structure. When contractors install non-flanged “replacement windows” in these homes, that seal is eliminated and replaced with caulk — a temporary sealant that deteriorates over time, allowing water to infiltrate wall cavities and cause structural rot and mold that may remain invisible for years.
Efthymiou singles out Renewal by Andersen as a prominent example of the problem, noting that the brand's entire retail replacement division sells exclusively non-flanged windows — designed for high-volume franchise installation speed rather than long-term structural integrity. He contrasts this approach with Royal Windows & Doors, a family-owned manufacturer operating in Bayshore since 1989, which produces both flanged and non-flanged windows and recommends the appropriate product based on each home's specific construction. Efthymiou also addresses pricing, noting that despite performing proper full-frame flanged installations, Royal Windows & Doors typically comes in significantly below national brand quotes by operating as a direct manufacturer with no franchise fees or distribution markup.
The interview advises homeowners who have had windows replaced in recent decades — particularly when the job was completed quickly without disturbing siding or interior trim — to inspect for warning signs of water intrusion, including cracked exterior caulk, wall staining near windows, soft spots in trim, and musty odors. For those planning upcoming projects, Efthymiou recommends asking contractors directly whether they are proposing flanged or non-flanged windows and requiring a clear explanation of how the water-tight wall connection will be maintained.
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