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Energy Efficiency – Five Key things to Consider

Superior Frame Materials

1 – Superior Frame Materials

Regardless of the type of frame, you want to make sure that you are getting a product that is energy efficient and durable. We offer a full range of frame materials and styles to meet a wide array of budgets and design needs.

Aluminum: While not as expensive as other window frame types, aluminum windows tend to be less efficient.
Wood: With custom finishes available to match just about any design and style, wood certainly offers an attractive and more classical look. Keep in mind, wood windows do require regular maintenance as far as staining and painting, and may not offer the insulating capabilities that you get with other window types.
PVC: A popular choice both for their price point and their low maintenance, these vinyl windows are becoming increasingly available in a broad range of colors and styles. As far as energy efficiency, they are filled with a polyurethane insulating foam. Some even give you the option of custom painting the frames.

2 – Low-E Glass: extra protection

Very important for the protection of the window itself and also for the home’s overall energy efficiency, “Low-E” is a type of coating with which windows are glazed that helps to reflect infrared and UV light. This means that the window performs better in terms of locking heat in and preventing damaging rays from ruining furniture, flooring and more.

3 – Multiple Panes

Single pane windows are rarely used anymore, as double or even triple pane have come to be the standard. With a gap in between that is filled with either air or gas, the insulating properties of the window unit skyrocket. We carry both double and triple pane options for maximum energy performance.

4 – Gas Fill

Now available with argon or krypton fill, our double and triple pane window products have gotten even better in terms of energy efficiency. Odorless, non toxic gases that help to drastically cut down on any heat conduction in the space between glass panes, gas fill for windows has really become the norm.

5 – Spacers

When you think about insulation in terms of a window, it is important to note that spacers play an integral role in ensuring that heat transfer and subsequent loss is minimized. Maintaining the distance between the panes and also insulating along the edges, spacers need to be of a durable material. Our window products feature both stainless steel and foam spacers depending on window line and budget.

Performance Ratings

All windows come with various labels and ratings. These are there so that the customer understands exactly what they are getting in terms of structural integrity and overall quality of the unit. These ratings standards were issued by The National Fenestration Rating Council (NFRC), and have been adopted by the Energy Star program as well. tion.

U Factor

U factor

This essentially measures the insulation property of the window itself. How well is it holding in heat and preventing air exchange…The U Factor ratings fall between 0.2 and 1.25—with the lower number indicating a better insulation value.

Solar Heat Gain Coefficient (SHGC)

Solar Heat Gain

Ranging from 0 to 1, this measures the amount of heat radiating from the sun that is being blocked. The lower the number, the more heat being reflected. A valuable piece of information, especially for hotter Southern climates.

Visible Transmittance (VT)

Visible Transmittance

This rating basically is used to measure how much light is getting through the entire window. Again, ranging from 0 to 1, a lower number signifies that more light is being let in.

Air Leakage

Air Leakage

Extremely important, this rating tells you how much air is getting into your home even if the window is closed. Scores are in the 0.1 and 0.3 range with the lower number suggesting that the air leakage rate is thus lower.

Condensation Resistance (CR)

Condensation Resistance

The buildup of condensation on the glass is something no one likes to see. This rating therefore, lets you know precisely how well the window will resist the formation of condensation. With scores ranging from 1 to 100, the higher the number, the better performing the window unit.

Glass Performance

There are many things to consider when replacing your windows and doors, and the glass you select is an important choice. Glass affects the look of your home from the curb, how clear your view is from inside the house, the amount of light allowed into your home and how comfortable you feel throughout the year. It can help you save money on heating and cooling bills and protect your belongings from fading.



Windows come with various coatings; these are used to amplify energy efficiency and help with things such as UV protection. The most common coating is Low E. However, we do offer other specialized coatings that can enhance your window’s performance and efficiency. protection.

Solar Clean Glass

Solar Clean Glass
  • Another coating, solar clean glass has photo catalytic and super hydrophilic properties. When water hits the surface of the glass, it has reduced contact due to the presence of this particular coating. It also helps to increase surface contact with the atmosphere and thereby decrease evaporation times.

Low-E 366

Low-E 366

The sun can certainly take its toll on your windows. With this coating however, the sun’s heat is reflected back and your view isn’t obstructed by tints or thermal shades. It’s made to let light in while keeping the heat outside.


To keep insulating gases inside the unit, high-performance spacers and sealants are required. And depending on where you live, different combinations of these elements provide better performance.


PIB/Silicone edge seal provides unparalleled longevity.

Silicone secondary seal is virtually unaffected by the UV, water, and temperatures for the length of the warranty and beyond.

Continuous stainless steel provides complete gas barrier coupled with Warm Edge Properties

Due to its longevity, Cardinal’s PIB/Silicone edge seal system provides the best Total Cost Benefit available.

Get A Quote

At your request, we will setup a time to come to your home to answer your questions and listen to your needs. We can then determine if we can meet your expectations. That is a no cost, no obligation service we provide for you.