Possible Clues:

• Workman placing barrel on stack at top of tier?
• Constructive type creating overlapping courses
• Workman who fits together what others embarrassingly drop?
• Builder sees hen producing good eggs?
• Agreeable chap put on coat for builder
• Barman admits strain on year changed homebuilder
• Manual worker barely moving having acquired sprain
• Construction worker's course?
• One putting stretcher down in heap covered by black blanket
• One of the masons has been around the block in The House