From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
coarse rendering /kˈɔːs ɹˈɛndəɹɪŋ/
Unterputz <masc>, Grobputz <masc>, Rohputz <masc>, Rauputz <masc>, Anwurf <masc>
Note: unterste Putzlage
Synonyms: rough rendering, roughcast, undercoat
see: cast, plaster, plaster work, thick plaster, thin plaster, fining coat, final coat, finishing coat, setting coat, set, cover coat, skimming coat, regrating skin, finish of window sill / cill, surface-mounted, flush-mounted, flush, buried, concealed, multiple-skin work, sparge sth., resurface a wall, render a wall