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External cavity walls shall adequately resist the passage of fire. Cavity barriers must be provided where a cavity abuts compartment walls and floors, around opening and to close off open cavities to prevent a route for fire spread.
Cavity barriers at party wall junctions start below DPC .
Place the cavity barrier within the sub structure starting at the concrete cavity fill.
Arc T-junction cavity barrier, tightly fitted.
Ensure the cavity barrier is installed continuously and to the manufacturer’s installation guide.
Masonry block work extended 450mm above the ceiling line. Cavity barrier installed before the installation of the spandrel panel.
When using partial fill insulation; the insulation board should terminate 75mm – 100mm below the soffit level.
Install cavity barrier between the block and the last brick course.
Ensure there are no gaps between the cavity barriers.
Continue insulation above the cavity barrier to the top of the wall plate.
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