Costs | Features | Building

Average prices for cash buyer in $/tonne
Metal	Jul-03	Jan-04	% increase
Aluminium	1436	1606	11
Copper	1709	2422	41
Lead	514	757	47
Tin	4732	6477	37
Zinc	825	1016	23

Roofing Costs
Description	unit	range (£)
Metal profiled/flat sheet roofing
Medium-quality coated aluminium or steel trapezoidal built-up roofing system,
sandwich liner system, vapour-control barrier and insulation	m2	35–45
Composite fully insulated coated aluminium or steel trapezoidal roofing system	m2	50–75
Tiling/slating (including underfelt and battens)
Concrete roof tiles	m2	35–45
Clay roof tiles (machine made)	m2	40–55
Man-made slate roofing	m2	50–65
Natural slate roofing	m2	100–120
Metal sheet coverings (including insulation, on breather membrane or vapour barrier)
Aluminium roofing with standing-seam joints	m2	55–80
Zinc roofing with standing-seam joints	m2	65–90
Copper roofing with standing-seam joints	m2	70–95
Stainless steel roofing with standing-seam joints	m2	70–95
Milled-lead code five, roofing coated with patination oil and with lead-rolled joints	m2	90–110
Asphalt, built-up and single-ply roofing (including insulation and vapour-control barrier)
Two coats asphalt roofing, 20 mm thick, including felt underlay	m2	55–75
Single-layer polymer roofing membrane	m2	65–75
High-performance bitumen felt roofing system	m2	70–80

Roof elements
	Average rate (£/m2)
Secondary schools	103
Secondary schools – specialised teaching blocks	110
Sixth form/tertiary colleges	143
Universities	180
Universities – specialised teaching blocks	152
Colleges	120
Colleges – mixed facilities	108
School/college/university libraries	153
General hospitals, GP hospitals, cottage hospitals	132
Hospital – mixed specialist facilities	125
Ward blocks	160
Offices	137
Banks/building society branches	134
One-off housing, detached (three units or less)	171

Roofing cost model
	Cost of coverings (£/m2)	Supporting structure (£/m2)	Typical life (£/m2)	Strip coverings (£/m2)	Scrap value (£/m2)	Cost to replace (£/m2)	Repair cost per year (£/m2)	Total cost to year 60 (£/m2)
Metal – pitched
Copper, half hard, 0.6 mm thick	61	87	100	3	11	53	0.28	164
Aluminium, PVF2
colour-coated, 0.7 mm thick	48	87	30	3	2	49	0.35	253
Lead, code 5, 2.24 mm thick	91	98	85	3	10	84	0.28	206
Stainless steel, 1.4401 grade,
0.4 mm thick	60	87	100	3	6	57	0.28	164
Zinc, 0.7 mm thick	56	87	30	3	3	56	0.43	281
Non-metal – pitched
Tiles, clay, machine-made	34	98	35	4	0	38	2.26	305
Tiles, clay, handmade	67	98	35	4	0	71	3.53	447
Tiles, concrete, interlocking	25	98	35	4	0	29	2.61	309
Tiles, concrete, plain	46	98	35	4	0	50	2.16	323
Welsh slate	70	98	100	4	0	74	2.37	310
Non-metal – flat
Single-ply	54	111	20	6	0	60	0.9	400