How to reduce rework in construction
Rework — tearing out and redoing work that was built wrong — consumes an estimated 5–12% of construction project cost, and most of it traces to information failures: crews building from superseded drawings, unanswered questions guessed at, and inspections that happened too late. Which is good news, because information failures are fixable.
The five causes, and the fix for each
- Superseded drawings on site. The classic: the wall built from rev B while the office holds rev D. Fix: one current drawing set, on phones, with revision control — see drawing management.
- Guessed answers. The question was real, but the RFI felt slow, so the crew proceeded on interpretation. Fix: make RFIs fast and visible enough that asking beats guessing.
- Inspections after cover-up. The rebar was wrong, but the pour happened before anyone checked. Fix: hold-point inspections scheduled against the program, flagged when overdue.
- Handoffs without acceptance. Trade B builds on trade A's out-of-tolerance work, and now two trades' work is wrong. Fix: quick acceptance checks at trade interfaces, photographed.
- Defects fixed badly. The same defect, fixed twice, is rework squared. Fix: defect records with explicit acceptance standards — see defect tracking.
Measure it or it stays invisible
Rework hides inside “general labor” because nobody codes it honestly. Start crude: tag any task that redoes previous work, and review the tags monthly by cause and by trade. Even rough numbers change behavior — a visible €30,000 of rework in month two buys more process discipline than any toolbox talk about quality. The photographic record does the same job in disputes: when every stage is photographed, the argument about who built it wrong takes minutes instead of weeks.
Doing this in TerenIQ
TerenIQ attacks the information failures directly:
- Current drawings live on every phone, with pins tying tasks and defects to the exact location.
- RFIs come back answered to the deck — the foreman reads the answer without leaving it.
- Inspection schedules flag hold points before work gets covered up.
- Defects carry photos, standards and status history, so fixes stick the first time.
Frequently asked questions
How much does rework cost in construction?
Studies consistently estimate direct rework at 5% of contract value, with total impact including delay and disruption reaching 10–12%. On a €2M project, that is €100,000–€240,000.
What is the single biggest cause of rework?
Information failures — building from wrong, missing or misunderstood information — are consistently the largest category, ahead of workmanship. That is why document control and fast RFIs beat exhortation.
Does rework include design changes?
Client-directed changes are variations, not rework, and should be paid. Rework is redoing work that failed to match the information available — keeping the two separate in your records is what protects your margin.