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| 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 | Ìý | Ìý |
| 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) | Ìý | Ìý |
| 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) | Ìý | Ìý |
| 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) | Ìý | Ìý |
| 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 (£/³¾2) | |
| Secondary schools | 103 |
| Secondary schools – specialised | Ìý |
| teaching blocks | 110 |
| Sixth form/tertiary colleges | 143 |
| Universities | 180 |
| Universities – specialised | Ìý |
| teaching blocks | 152 |
| Colleges | 120 |
| Colleges – mixed facilities | 108 |
| School/college/university libraries | 153 |
| General hospitals, GP hospitals, | Ìý |
| cottage hospitals | 132 |
| Hospital – mixed specialist facilities | 125 |
| Ward blocks | 160 |
| Offices | 137 |
| Banks/building society branches | 134 |
| One-off housing, detached | Ìý |
| (three units or less) | 171 |
| Roofing cost model | ||||||||
| Ìý | Cost of coverings | Supporting structure | Typical life | Strip coverings | Scrap value | Cost to replace | Repair cost per year | Total cost to year 60 |
| Ìý | £/³¾2 | £/³¾2 | years | £/³¾2 | £/³¾2 | £/³¾2 | £/³¾2 | £/³¾2 |
| Metal – pitched | ||||||||
| Copper, half hard, 0.6 mm thick | 61 | 87 | 100 | 3 | 11 | 53 | 0.28 | 164 |
| Aluminium, PVF2 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| 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 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| 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 |
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