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Keep up to dateSpecification options | ||
External solar shading louvres | Capital cost £/m | Net present value for 60 years £/m |
Aluminium areofoil sections, fixed, 1.2m projection | ||
Mill finished | 220 | 400 |
Polyester powder coated to BS 6496, minimum 40 microns thick | 270 | 600 |
Polyvinylidene fluoride (PVDF or PVF2) minimum 25 microns thick | 320 | 690 |
Anodised BS 3987, minimum 25 microns thick | 250 | 480 |
Aluminium slat sections, fixed, 1.2m projection | ||
Polyester powder-coated to BS 6496, minimum 40 microns thick | 180 | 450 |
Aluminium louvre system adjustable with polyester powder-coated to BS 6496 | ||
Manually adjustable with crank | 370 | 990 |
Motorised adjustment | 595 | 1,650 |
A discount rate of 3.5% is used to calculate net present values. Extruded aluminium to EN 755. Period to first maintenance dependant on colour of finish and exposure to pollutants and solar radiation. In practice, it may be more economical to replace solar shading rather than remove and recoat, or carry out insitu redecoration. An alternative strategy may incorporate solar shading replacement, or redecoration, with a major facade refurbishment. Life-cycle costs include servicing, inspection, cleaning, allowance for repairs and replacement at period to first maintenance (upper values used in the table).BLP provides latent defect warranties for buildings www.blpinsurance.com. For durability information contact: peter.mayer@blpinsurance.com or call 020-7204 2450. |
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