Insulating Glass

Insulating glass was invented in the 1930's but used on a very limited basis in the south until the mid 50's . The first residential uses were the “Picture Window” which generally referred to a large fixed window greater in size than 5' x 4' located between two operable windows. Because of the large expanse of glass these windows were often glazed with insulating glass even if adjacent windows were glazed with single glazing. Since Caldwell Glass was located in the foothills in close proximity to the Blue Ridge Mountains of North Carolina, there was an early market for insulating glass in mountain homes.   At the 3800 foot level of the eastern continental divided, which was only 20 miles to our west, insulating glass helped maintain the views and comfort of many mountain homes. The basic procedure for this installation was to field build frames on site and provide wood stops front and rear of the glass to hold it in place. Unknowingly this would set up another opportunity for Caldwell Glass at the end of the life cycle of the original installation.

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