Thermal Distortion

Distortion of materials and products due to the concentrated reflection of sunlight from a neighboring surface is infrequent and occurs only with an unusual combination of conditions. The Vinyl Siding Institute (VSI) has outlined the currently available information related to this phenomenon and its effect on vinyl siding in particular.

Solar Reflection and Heat Distortion

The National Association of Home Builders (NAHB) Building Products Issues Committee has conducted a review of the issue. They formed a task group to collect and evaluate available information on the issue and in February 2010 released a report of their findings titled The Effect of Reflected Sunlight from Low-e and other Double Paned Window Glass on Vinyl Siding. The NAHB report helps to provide a clear understanding of this issue from a third party and outlines how siding distortion from reflected sunlight might be remedied, or even avoided, in the future.

View report



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