Lang Exterior Blog

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The Lang Exterior, Inc.™ Guide to Energy Efficient Windows

Energy Efficient Argon is an inert gas which means it does not react with many other elements, and is about 25% more dense than air. That is why we offer … Continue reading

April 1, 2014

Insulated Glass Units by Lang Exterior, Inc.™

When multiple glass panes are assembled together they are commonly referred to as insulated glass units, or IG. These units provide good insulation to your windows. Lang Exterior’s IGs are … Continue reading

March 3, 2014

The PowerWeld 1650 Slider + Enhanced Glass package

RESULTS   U-Factor: 0.303   SHG: 0.267   CVT: 0.506 Windows must be ordered with the Enhanced Glass Package to get these ratings. Project Summary Architectural Testing, Inc. was contracted … Continue reading

February 26, 2014

How Low-E Glass Works

According to U.S. Government estimates, an average household spends more than 40% of its annual energy budget on heating and cooling. A heat-reflective coating can add to the energy efficiency of … Continue reading

February 12, 2014

Lang Exterior Sells Insulated Glass Units

  Did you know that Lang Exterior manufactures and sells Insulated Glass Units in addition to complete windows? Our customers can order IGUs with the same glass options as our … Continue reading

November 1, 2013


Did you know? Did you know that Lang Exterior makes a glass option that can significantly reduce the amount of noise that comes into your house? Well it’s true they do! … Continue reading

October 29, 2012

What is the most energy efficient replacement window?

Krypton vs. Argon One of the most sought after qualities in a replacement window is energy efficiency. Most people however wouldn’t know how energy efficiency can be achieved with different window … Continue reading

April 3, 2012