Christopher J. Barry

Chris Barry

Christopher J. Barry, is a mechanical engineer from Dublin, Ireland. He worked in flat glass manufacture, fabrication, installation and customer service for 50 years with Pilkington, LOF and NSG in Canada, USA and worldwide. Barry is active in ASTM E6 glass strength and design. He has been semi-retired for the past 10 years while enjoying independent glass consulting work investigating glass fracture, fractography and breakage prevention from Perrysburg, Ohio. Opinions expressed are the author's own and do not necessarily reflect the position of the National Glass Association or Window + Door.

Window Condensation Tells Many Tales

Condensation, whether wanted or not, can be a useful indicator of many physical processes. By observing the condensation trails of high-altitude jet planes, for example, one can easily estimate the speed, direction and stability or turbulence of air in the upper atmosphere.