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Watson Window

Residential Window Installation in Dallas-Ft Worth TX

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Serving the Dallas & Fort Worth areas Watson Windows specializes in custom, energy-efficient vinyl and aluminum windows that are made specifically to stand up to the Texas climate.

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Low-E Windows

Energy Efficient Technology in Windows for DFW Residents


Low-E glass is used in window panes to help insulate against heat and cold that can seep into your home and increase the cost of energy expenses. If you look at many new homes on the market today, when energy efficiency is such an important concern, many of them have windows that appear to be colored or coated, similar to those found in modern office buildings. These are Low-E glass windows.

Low-E windows are a technological advance in the manufacturing of residential products. In Low-E windows, the glass is coated with a micro-thin layer of metal, which helps to retard the absorption of heat (ultraviolet and radiant heat waves) from outdoors, thereby keeping your home cooler in the summer, as well as to insulate against the cold and hold in the heat during the winter.

The “E” stands for “Emissivity”, which is defined as the relative power of a surface to emit heat by radiation. Therefore, Low-E windows are designed specifically to emit very low levels of heat to be conducted through the glass.

Two Types

There are two types of Low-E glass – hard coat and soft coat. Hard coat Low-E windows are manufactured by pouring a thin layer of molten tin onto a sheet of glass while the glass is still slightly molten. The tin becomes welded to the glass and is hard to scratch or remove from the surface of the glass. Typically, hard coat Low-E windows have a bluish tint.

Soft coat Low-E windows are created from the application of zinc, silver, or tin to the glass in a vacuum. The glass is put into a vacuum chamber full of electrically charged gas. The electricity combined with the vacuum properties let molecules of metal ‘spray’ or ‘sputter’ onto the glass, coating it in a delicate layer. When silver is used, oxidation is possible when exposed to air. Therefore, the Low-E glass must be used in an insulated glass assembly, with the soft coating between two other pieces of glass. Soft coat Low-E glass can reflect more heat back to the source and typically has a higher R value (resistance to heat loss).

Energy Efficiency

With rising energy costs and damage to the environment, energy efficiency is an imperative part of any home improvement decision. Opting for Low-E windows to replace your old windows can help to maintain a healthy environment as well as protect your home and pocketbook from costly damages. Contact Watson Windows today to learn more about the options for installing Low-E windows in your home and the costs involved.



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