Building worker (9)
(Other definitions for plasterer that I've seen before include "Coverer of walls, ceilings, etc" , "Workman who skims along" , "One covering walls" , "Tradesman" , "may get one drunk?" .)
(Other definitions for bricklayer that I've seen before include "Builder of 36 ac" , "Labourer" , "Wall builder" , "worker in bonds" , "Construction worker" .)
(Other definitions for roofer that I've seen before include "High-level building worker" , "Person working on top of a house" , "One putting top on building" , "One works on the top of a house" , "eg Thatcher" .)