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700 DRY VENTILATED RIDGES
• Underlay: Provide air gap at apex.
• Dry ridge fixing battens: site specific.
• Dry ridge tiles:
- Manufacturer: Contractor's choice.
Product reference: Contractor's choice.
- Accessories: site specific.
• Ridge terminals:
- Manufacturer: Contractor's choice.
Product reference: Contractor's choice .
710 DRY RIDGES
• Underlay: Lay courses over ridge.
- Overlap (minimum): 150 mm.
• Dry ridge fixing battens: site specific.
• Dry ridge tiles:
- Manufacturer: Contractor's choice.
Product reference: Contractor's choice.
- Accessories: site specific.
• Ridge terminals:
- Manufacturer: Contractor's choice.
Product reference: Contractor's choice.
840 VENTILATOR TILES
• Ventilator tiles: as an alternative to ventilators, by agreement.
- Manufacturer: Contractor's choice.
Product reference: Contractor's choice.
- Requirement: To ventilate roof void / above insulation; site specific.
- Positions: site specific.
RotF generic (intermediate) NBS 2014 6118-AEW-XX-XX-NBS-A-01
