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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 skin12038615-25
3 mm thick polycarbonate pyramid rooflight double skin18051015-25
3 mm thick polycarbonate rooflight triple skin20055115-25
PVC
3 mm thick PVC domed rooflight single skin12040215-20
3 mm thick PVC domed rooflight double skin18053315-20
Glass
Safety glass to BS 6206, flat surface, double glazed with built-in kerb.310777Oct-25
Georgian wired glass circular domed glazing, 600 mm diameter, 7 mm thick, glass to BS EN 572-329048860