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Keep up to dateStone cladding typeCapital costNet present value for 60 yearsDesign life | |||
£/m2 | £/m2 | years | |
Natural stone | |||
50 mm thick limestone in flush-pointed cement lime mortar | 350 | 431 | 60 |
75 mm thick Portland limestone in flush-pointed cement lime mortar | 425 | 516 | 60 |
Granite with sealant joints | 500 | 619 | 60 |
Precast concrete units | |||
Exposed aggregate precast concrete units with sealant joints | 225 | 295 | 60 |
Reconstructed stone precast concrete units in flush pointed cement lime mortar | 425 | 516 | 60 |
Limestone-faced precast concrete units in flush pointed cement lime mortar | 600 | 713 | 60 |
Granite-faced precast concrete units with sealant joints | 675 | 802 | 60 |
Table notes | |||
Costs include inspection, cleaning, repointing or resealing, and minor repairs | |||
Stone and concrete units are fixed with stainless steel fixings | |||
Cost and work frequencies are generic, based on a 500 m2 plain office facade | |||
Insulation and lining, scaffolding and overheads are excluded | |||
Capital costs vary significantly reflecting the variable nature of stone: best value should be determined from a whole-life assessment of cladding options which satisfy project specific criteria | |||
A discount rate of 3.5% is used to calculate net present values |