First component to be installed and fitted at the lowest point on a standard abutment. It collects water gathered by the rest of the system and discharges it from the wall through a weep unit. For use at the abutment of a pitched roof with a cavity wall.
On external walls - not exceeding 120mm thickness, built from standard brickwork or similar sized components with regular course heights, including mortar of approx. 75mm.
On roof pitches of 15 -60°
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