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| Percentage change year on year (4Q06 - 4Q07) | |
| Trend | |
| Building cost index | 4.9 |
| Mechanical cost index | 4.3 |
| Electrical cost index | 4.3 |
| Consumer prices index | 2.1 |
| (4Q07 figures provisional) | |
| Price adjustment formulae for construction. Categories showing the greatest variation from this are: | |
| % change | |
| Cladding and covering: lead | 9.5 |
| Waterproofing: asphalt | 8.1 |
| Sanitary appliances | 4.6 |
| Among those that registered a fall were: | |
| Cladding and covering: zinc | –10.8 |
| Cladding and covering: copper | –6.1 |
| Concrete: reinforcement | –4.5 |
| Pipes and accessories: copper | –3.3 |
| Most marked movements over the year: | |
| Cladding and covering: lead | 24.6 |
| Waterproofing: asphalt | 10.6 |
| Piling: steel | 10.4 |
| Cladding and covering: zinc | –14.1 |
| Executive summary: Electricians 4% rise in hourly rates | ||
| Transport provided | Own transport | |
| Technician (or equivalent specialist grade) | £14.02 | £14.73 |
| Approved electrician (or equivalent specialist grade) | £12.38 | £13.08 |
| Electrician (or equivalent specialist grade) | £11.35 | £12.06 |
| Electrical improver/senior-graded electrical trainee | £10.21 | £10.86 |
| Labourer/adult trainee | £9.01 | £9.67 |