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You should fix Sarking under the following circumstances:
- Where local or building regulations dictate the use of sarking.
- Where local conditions include a high risk of wind driven rain.
- Where the roof design means water is discharged from an upper storey.
- Where the roof design includes exposed rafters with top lining.
- Where the roof pitch is 15° or less (Alpine and Villa profile).
- Where the roof pitch is 19° 47´ or less (Shingle profile).
- Areas of design wind velocity greater than 47 metres/second.
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