Dachstein, in particular roof tiles, with one or more juxtaposed sections, each of which has a trough-shaped depression and an adjacent raised longitudinal region and a head and one of the raised longitudinal region to cross Seitenverfalzung, both in the trough-shaped depression and in the adjacent a longitudinal recess provided a recess which at least partially the trough-shaped and the raised course of the roof stone substantially following contour has herseites and into which a solar film is to be inserted.
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