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385 FILTER LAYER
• Type: As membrane manufacturer's recommendations.
•
Manufacturer: Contractor's choice.
•
- Product reference: site specific.
Grade: Submit proposals.
395 VAPOUR CONTROL LAYER
• Type: As membrane manufacturer's recommendations.
• Manufacturer: Contractor's choice.
- Product reference: site specific.
• Thickness: site specific.
• Vapour resistance: site specific.
400 BUILT-UP REINFORCED BITUMEN WATERPROOF COVERING
• System manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
• First layer: To BS 8747, class S2P3 .
- Attachment: Pour and roll bonding.
• Intermediate layer: To BS 8747, class S2P3 (where required).
- Attachment: Pour and roll bonding.
• Top layer/ Capsheet: To BS 8747, class S4P4.
- Colour: site specific.
- Attachment: Pour and roll bonding.
• Flashings and detail work: site specific.
• Guarantee: 15 years.
410 EXPANDED POLYSTYRENE (EPS) WARM DECK ROOF INSULATION
• To BS EN 13163.
• Manufacturer: Contractor's choice.
- Product reference: site specific.
• Grade: As insulation manufacturer's recommendations for the traffic loading.
• Recycled content: Submit proposals.
• Edges: Rebated.
• Thickness: site specific.
• Facing: Factory bonded foil upper face.
425 MINERAL WOOL (MW) WARM DECK ROOF INSULATION
• Standard: Roofing grade to BS EN 13162.
• Manufacturer: Contractor's choice.
- Product reference: site specific.
• Grade (minimum): As insulation manufacturer's recommendations for the traffic
loading.
• Recycled content: Submit proposals.
• Edges: Rebated.
• Thickness: site specific.
• Facing: Glass tissue.
RotF generic (intermediate) NBS 2014 6118-AEW-XX-XX-NBS-A-01