Page 233 - McD_6118-AEW-XX-XX-NBS-A-001_Neat

450 STEP AND COVER FLASHINGSgenerally
• Lead:
- Thickness: 2.00 or 2.24 mm (Code 5).
• Dimensions:
- Lengths: Not more than 1500 mm.
- End to end joints: Laps of not less than 100 mm.
- Upstand: Not less than 85 mm.
- Cover to roof: Not less than 150 mm.
• Fixing: Lead wedges at every course and clips at not more than 500 mm centres
along free edge.

454 SINGLE STEP FLASHINGSgenerally
• Lead:
- Thickness: 2.00 or 2.24 mm (Code 5).
• Dimensions:
- Lengths: Not more than 1500 mm.
- End to end joints: Laps of not less than 50 mm.
- Cover: Overlap to lead roof upstand of not less than 65 mm.
• Fixing: Lead wedges at every step.

492 VERTICAL TILING/ SLATING BOTTOM EDGE FLASHINGS
• Lead:
- Thickness: 2.00 or 2.24 mm (Code 5).
• Dimensions:
- Lengths: Not more than 1500 mm.
- End to end joints: Laps of not less than 100 mm.
- Width: Adequate for underlap to abutment and dressing down over tiles/ slates
not less than 150 mm.

494 VERTICAL TILING/ SLATING SIDE ABUTMENT STEP FLASHINGS
• Lead:
- Thickness: 2.00 or 2.24 mm (Code 5).
• Dimensions:
- Lengths: Not more than 1500 mm.
- End to end joints: Laps of not less than 100 mm.
- Width: Adequate for not less than 75 mm underlap with welted edge to tiles/
slates and not less than 50 mm cover to abutment.

496 VERTICAL TILING/ SLATING ANGLE SOAKERS
• Lead:
- Thickness: 1.25 or 1.32 mm (Code 3).
• Dimensions:
- Length: Tile/ slate gauge + lap + 25 mm.
- Underlaps: Not less than 150 mm.

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