We collected testimonials about cases ending up in the need for rework. People working at construction sites and from a provider of insurances gave us the information. Some of the cases show how damp when released from young concrete results in the need for rework. Other cases show how leakages not only result in repair for membranes, roofs and faulty pipes but also need for drying of concrete and replacement of damaged material. When slopes and altitudes in the structures or in the sewer lines are faulty considerable costs for rework will follow. The trade rules for plumbing work point out actions that could help to avoid some of the problems that recurrently occur among the cases in the testimonials. Education is a way to avoid rework in case of skill-based reasons. When violation to any instruction or principle is the reason responsibility should be placed with the person who can influence the outcome. All cases show the need for great care in the construction process.