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440 EXTRUDED POLYSTYRENE (XPS) INVERTED ROOF INSULATION
• Standard: To BS EN 13164.
• Manufacturer: Contractor's choice.
- Product reference: site specific.
- Grade: As recommended by insulation manufacturer for traffic loading.
• Edges: Rebated.
• Thickness: site specific.
• Integral topping: site specific.

455 CORKBOARD OVERLAY TO WARM DECK ROOF INSULATION
• Standard: To BS EN 13170.
• Manufacturer: Contractor's choice.
- Product reference: site specific.
• Density: As insulation manufacturer's recommendations for the traffic loading.
• Thickness: site specific.

460 STONE BALLAST
• Type: Washed, round aggregate.
• Supplier: Contractor's choice.
• Size: site specific.
• Colour: site specific.
• Recycled content: Submit proposals.

465 PRECAST CONCRETE PAVING SLABS site specific.
• Standard: To BS EN 1339, hydraulically pressed.
• Manufacturer: Contractor's choice.
- Product reference:
• Colour/ Finish: site specific.
• Finish: site specific.
• Size: site specific.
• Recycled content: Contractor's choice.

467 SUPPORT SYSTEM FOR PRECAST CONCRETE PAVING SLABS

• Manufacturer: Contractor's choice.

• - Product reference: site specific.
•
Size: site specific.

Accessories: site specific.

475 CHIPPINGS AND DRESSING COMPOUND
• Chippings: site specific.
• Supplier: Contractor's choice.
• Size (minimum): 10 mm nominal, graded as single sized aggregate for flat roofing
(i.e. low in fines).
• Dressing compound: To BS EN 12591.
• Recycled content: Submit proposals.

478 SOLAR REFLECTIVE PAINT
• Manufacturer: Contractor's choice.
- Product reference: site specific.
• Colour: site specific.

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