In terms of energy efficiency, why might an architect recommend re-glazing existing windows?

Re-glazing existing windows is a strategy focused primarily on enhancing energy efficiency, which directly contributes to energy cost savings. By replacing old, single-pane glass with modern, more efficient glazing solutions—such as double-glazed or low-emissivity (Low-E) glass—architects can significantly reduce heat transfer. This means that in colder temperatures, less heat escapes from the building, and in warmer conditions, less heat enters, consequently reducing the demand on heating and cooling systems. As a result, this improvement can lead to lower energy bills and a reduced carbon footprint, aligning with sustainability goals.

While increasing sound insulation, improving aesthetic appeal, and facilitating better natural lighting are all potential benefits of re-glazing, they are secondary to the primary objective of enhancing energy efficiency and achieving cost savings through better thermal performance. This focus on energy efficiency not only addresses immediate financial considerations but also contributes to long-term environmental benefits.