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325 BONDING COMPOUNDS
• Type: Oxidized bitumen to BS 3690-2, grade recommended by bitumen membrane
manufacturer.
• Restriction: For heat sensitive insulation materials, use cold bonding compounds.

330 TIMBER TRIMS, ETC
• Quality: Planed. Free from wane, pitch pockets, decay and insect attack (except
ambrosia beetle damage).
• Moisture content at time of covering (maximum): 22%.
• Preservative treatment: As recommended by bitumen membrane manufacturer.

335 ANGLE FILLETS
• Material: Treated timber.
- Size (minimum): site specific.
• Restriction: Fillets under torch-on bitumen sheets to be non-combustible.

340 PREFORMED SLEEVES, ETC
• Type: Preformed flanged sleeve.
• Manufacturer: Contractor's choice.
- Product reference: site specific.
- Colour: site specific.
- Size (minimum): site specific.

345 PERIMETER TRIMS
• Type: Aluminium to BS EN 12020-1, grade EN-AW 6063T4 or EN-AW 6063T6.
• Manufacturer: Contractor's choice.
- Product reference: site specific.
• Colour: site specific.
• Size: site specific.
- Lengths (maximum): 3 m.

360 PLYWOOD OVERLAY TO METAL DECK
• Standard: To BS EN 636, section: 7 (plywood for use in humid conditions)..
- Quality: Naturally durable timber, free from preservatives.
• Thickness: 18 mm.

365 ORIENTED STRAND BOARD (OSB) OVERLAY TO METAL DECK

• Standard: To BS EN 300, type: OSB/3.

• Thickness: 18 mm.

370 COVER STRIPS TO JOINTS IN RIGID BOARD SUBSTRATES
• Bitumen membrane: To BS 8747, class S2P3.
• Width: 150 mm.

375 MINOR MOVEMENT JOINTS IN SUBSTRATES
• Manufacturer: Contractor's choice.
- Product reference: site specific.
• Size: site specific.
• Insert colour: site specific.

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