This European standard defines a methodology for the exposure in laboratory of stone materials specimens (see Note 1) to artificial source(s) characterized by spectral power distribution simulating solar radiation. The irradiation is finalized to the evaluation of changes of material characteristics induced by simulated daylight radiation. This European standard is applicable to both natural and artificial materials untreated and treated (see Note 2). NOTE 1 Stone materials are both natural stones (rocks) and artificial stone materials (mortars, stuccoes, bricks, ceramic materials, etc.). NOTE 2 Treated materials are those on which one of the following treatments has been applied: cleaning, application of water repellent, consolidating materials or biocides and artificial ageing test.