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Percentage change year on year (4Q06 - 4Q07)
 Trend
Building cost index4.9
Mechanical cost index4.3
Electrical cost index4.3
Consumer prices index2.1
(4Q07 figures provisional)
Price adjustment formulae for construction. Categories showing the greatest variation from this are:
 % change
Cladding and covering: lead9.5
Waterproofing: asphalt8.1
Sanitary appliances4.6
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: lead24.6
Waterproofing: asphalt10.6
Piling: steel10.4
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