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| Out-of-plane dome rooflight glazing optionsCapital cost (£/unit)Net present value for 60 years (£/unit)Service life (years) | |||
| Polycarbonate | |||
| 3 mm thick polycarbonate pyramid rooflight single skin | 120 | 386 | 15-25 |
| 3 mm thick polycarbonate pyramid rooflight double skin | 180 | 510 | 15-25 |
| 3 mm thick polycarbonate rooflight triple skin | 200 | 551 | 15-25 |
| PVC | |||
| 3 mm thick PVC domed rooflight single skin | 120 | 402 | 15-20 |
| 3 mm thick PVC domed rooflight double skin | 180 | 533 | 15-20 |
| Glass | |||
| Safety glass to BS 6206, flat surface, double glazed with built-in kerb. | 310 | 777 | Oct-25 |
| Georgian wired glass circular domed glazing, 600 mm diameter, 7 mm thick, glass to BS EN 572-3 | 290 | 488 | 60 |
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