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155 PARTIAL FILL CAVITY INSULATION
• Insulation: Polyisocyanurate (PIR) foam boards.
- Standard: BS EN 13165.
- Product certification: British Board of Agrement (BBA).
• Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
• Recycled content: Submit proposals.
• Face size (length x width): apprpriate to suite site specific details.
• Thickness (nominal): min 50 mm - site specific to suit thermal requirements.
• Thermal conductivity: typically 0.035 W/mK - site specific.
• Reaction to fire class: A1.
• Additional requirements: None.
• Placement: Secure against face of inner leaf.
- Residual cavity: Clear and unobstructed.
• Joints between boards, at closures and penetrations: No gaps and free from
mortar and debris.

160 AIR BRICKS IN EXTERNAL WALLING
• Standard: To BS 493, class 1.
• Manufacturer: Contractor's choice .
- Product reference: Contractor's choice .
• Apertures: Rectangular hole .
• Work sizes: 215 x 65 mm .
• Material/ Colour: To match adjoining masonry .
• Placement: Built in with no gaps at joints.

180 CAVITY CLOSERSgenerally
• Manufacturer: Contractor's choice .
- Product reference: Contractor's choice .
• Accessories: To include integral dpc .

REINFORCING/ FIXING ACCESSORIES

210 CAVITY WALL TIESGENERALLY
• Standard: To DD 140-2.
- Type: site specific as DD140-2 .
• Material/ finish: Galvanized low carbon steel .
• Sizes: site specific .

211 CAVITY WALL TIES USED WITH PARTIAL FILL INSULATIONGENERALLY
• Standard: To DD140-2.
- Type: site specific as DD140-2 .
• Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
• Material/ finish: Galvanized low carbon steel .
• Sizes: site specific .
• Tie mounted insulation retaining clips: As recommended by tie manufacturer.

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