The older glass windows found in many homes are notorious for poor thermal performance. Having a number of such windows leaking heat during cold weather or letting it in on hot summer days can drive a home’s energy bills to unacceptably high levels.

In many cases, investing in upgraded, more energy-efficient windows will pay off quite quickly. While it will almost always be wise to consider double-glazed windows to replace those with only a single layer of glass, there are other issues to consider. Coatings applied to create low-e glass, for example, can provide significant benefits of their own.

Appropriately Coated Glass Outperforms the Alternatives

Untreated glass alone does not exhibit especially desirable thermal characteristics. Trapping a layer of air or a specially selected gas between two panes of glass, however, will improve performance significantly in most cases.

Another possibility is to coat the glass itself to make it more energy efficient. Coatings applied to pieces of glass for this purpose can vary from one another in a variety of relevant, significant ways. Some of the issues that it will normally pay to take into consideration include:

  • Coating type. A coating must be applied to a sheet of glass in an appropriate manner to ensure its performance and permanence. There are two processes that are most often used today to apply coatings to pieces of glass. The more common option is to fuse a specially formulated coating to the glass using intense heat. Another possibility is to deposit particles of vaporized coating on glass under a vacuum.
  • Coating location. A standard double-glazed window will include four glass surfaces that can potentially be coated. When a coating is meant to block some transmission of sunlight, it will normally be applied to the outermost surface. Coatings that focus on minimizing thermal transfers, on the other hand, will often be applied to surfaces that face the inside of a home.

Windows That Lower Energy Bills Significantly

When double-glazed windows include glass that has been coated appropriately, their energy-efficiency levels can rise significantly. That frequently makes investing in such upgrades worthwhile for homeowners who might otherwise be forced to pay overly high utility bills for years on end.

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