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660 SIDE ABUTMENTS
• Underlay: Turn up not less than 100 mm at abutments.
• Abutment slates: Cut as necessary. Fix close to abutments.
• Soakers: Interleave with abutment slates. Fix by turning down over head of
abutment slates.

670 TOP EDGE ABUTMENTS
• Underlay: Turn up not less than 100 mm at abutments.
• Top slate courses: Fix close to abutments.

675 TOP EDGE VENTILATED ABUTMENTS
• Underlay: Provide air gap at abutment as recommended by ventilator
manufacturer.
• Abutment ventilator:
- Manufacturer: Contractor's choice.
Product reference: Contractor's choice.
- Fixing: As recommended by manufacturer.

700 DRY VENTILATED TILE RIDGES
• Underlay: Provide air gap at apex as recommended by ridge tile manufacturer.
• Dry ridge fixing battens: site specific.
• Dry ridge tiles:
- Manufacturer: Contractor's choice.
Product reference: Contractor's choice .
• Ridge terminals:
- Manufacturer: Contractor's choice .
Product reference: Contractor's choice .

840 VENTILATOR SLATES
• Ventilator slates:
- Manufacturer: Contractor's choice.
Product reference: Contractor's choice.
- Requirement: To ventilate roof void; site specific.
- Positions: site specific.

VERTICAL SLATING EDGES/ JUNCTIONS

910 BOTTOM EDGES
• Slating substrate work: Fix timber tilting fillet to support bottom course of slates in
correct vertical plane. Fix flashing to tilting fillet.
• Underlay: Dress over flashing.
• Undercourse and bottom course slates: Fix with tails neatly aligned.

920 TOP EDGES
• Top slate courses: Fix under abutment and make weathertight with flashings
dressed down not less than 150 mm.

930 SIDE ABUTMENTS
• Slating substrate work: Chase abutment wall and insert stepped flashing.
- Flashing: Return not less than 75 mm behind slating, overlapping underlay and
battens. Turn back to form a vertical welt.
• Abutment slates: Cut and fix neatly.

RotF generic (intermediate) NBS 2014 6118-AEW-XX-XX-NBS-A-01