Wordnet 3.0
NOUN (1)
1. 
 a craftsman who lays or repairs roofs; 
The Collaborative International Dictionary of English v.0.48:
Roofer \Roof"er\, n.
   One who puts on roofs.
   [1913 Webster]
WordNet (r) 3.0 (2006):
roofer
    n 1: a craftsman who lays or repairs roofs