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R10 Rainwater drainage systems

GENERAL

110 GRAVITY RAINWATER DRAINAGE SYSTEM
• Rainwater outlets: Proprietary.
• Gutters:
- Aluminium;
- Cast iron;
- Combined fascia, soffit and gutter; and
- Composite.
• Pipework:
- Aluminium;
- Cast iron, spigot and socket, sealed;
- PVC-U, external; and
- PVC-U, sealed.
• Below ground drainage: As section R12.
• Disposal: To surface water drainage.
• Controls: Submit proposals.
• Accessories:
- Anticlimb rainwater pipe covers;
- Insulation to internal downpipes;
- Insulation to internal gutters; and
- Sealant for gutters.

SYSTEM PERFORMANCE

210 DESIGN
• Design: Complete the design of the rainwater drainage system.
• Standard: To BS EN 12056-3, clauses 3-7 and National Annexes.
• Proposals: Submit drawings, technical information, calculations and manufacturers'
literature.

221 COLLECTION AND DISTRIBUTION OF RAINWATER
• General: Complete, and without leakage or noise nuisance.

230 DESIGN PARAMETERS - GENERAL
• Roof and gutter construction and finish: site specific.
• Design rate of rainfall: As BS EN 12056-3, National Annex NB.2.
- Category: as BS EN 12056-3.
• Design life of building: 30 years.
• Available capacity of existing below ground drainage (maximum): site specific.

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