From German - English Ding/FreeDict dictionary ver. 1.9-fd1:
Estrich /ˈɛʃtɾɪç/ <masc, n, sg> [Schw.] [arch.] attic <n>, loft <n> [Br.] , garret <n> [poet.] Synonyms: Dachboden, Boden, Speicher, Söller, Bühne, Unterdach
see: Dachböden, Böden, Speicher, Söller, Bühnen, Unterdacher, Estriche
From German - English Ding/FreeDict dictionary ver. 1.9-fd1:
Estrich /ˈɛʃtɾɪç/ <masc, n, sg> [constr.] floor pavement <n>, floor finish <n>, floor fill <n>, screed <n> "den Estrich mit einer Latte abziehen" - level the floor pavement with a screed board see: schwimmender Estrich, Lehmestrich, Zementestrich
Note: Unterboden