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245 SPIRAL WRAPPING AND STIRRUPS FOR CASINGS
• Spiral wrapping: Form from 3 mm wire.
• Stirrups: Form from either:
- 6 mm wire; or
19 x 10 mm galvanized steel channel.

265 BUILDING PAPER
• Type: Water resistant breather paper.
• Standard: To BS 4016.

285 FIXINGS
• Nails: 38 x 2 mm galvanized steel clout nails to BS 1202-1.
• Staples: 32 x 2 mm galvanized steel.

EXECUTION

335 FIXING SPIRAL WRAPPING FOR CASINGS
• General: Wrap tightly at 300 mm pitch.

345 FIXING STIRRUPS FOR CASINGS
• Spacers: Continuous 19 mm steel channels.
• Fixing: Tight and secure.
- Soffit: Bolted to cast-in stub hanger.
- Beams: Welded to spacer channels.

365 FURRINGS
• Locations: To timber supports more than 75 mm wide.
• Requirement: Before fixing plain expanded metal lath, fix 22 x 6 mm hardwood
furrings.

375 FIXING BUILDING PAPER
• Installation: Start from the bottom. Fix in horizontal lengths with clout nails or staples.
- Laps: 100 mm.

395 FIXING METAL LATH
• Expanded metal lath to metal: 1.2 mm wire ties.
• Ribbed metal lath to metal: 1.6 mm wire ties, or doubled 1.2 mm wire ties.
• Welded mesh and paper lath to metal: 1.2 mm wire ties.
• Fixing to runners: 1.2 mm wire ties.
• Wire ties: Twist ends tightly together, cut off surplus and bend ends of wire away
from face of coating.
• Fixing to timber: Select from clout nails or staples.

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