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With the coping stone removed, bond the membrane over the parapet wall leaving a 30 mm gap from the external wall face, seal the membrane edge onto a bead of water block mastic

Bed the coping stones over the parapet wall using a tough sand and cement mortar mix of at least 3 and 1 ratio with added PVA adhesive for extra strength.

Note: EPDM expands in hot weather and can crack weak mortar.

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