April 29, 2011 - Intended for use with metal industrial roofs and metal roofing sandwich panels, Vega multi-wall polycarbonate cellular panel system lets in natural illumination with light transmission rates of 52% (clear) and 35% (Opal). Impact-resistant ...
Source: http://news.thomasnet.com/fullstory/Polycarbonate-Roofing-Panels-suit-daylighting-applications-595330
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