The Icopal Monarfloor Bridgestop System Kit is an acoustic isolation system for party walls on raft foundations or a continual slab. The Icopal Monarfloor Bridgestop System Kit isolates both masonry leaves from each other, preventing an acoustic bridge should mortar collect at the cavity base. The Icopal Monarfloor Bridgestop System Kit also isolates the party wall from the concrete sub-floor, reducing acoustic flanking and improving damping. Where used with a methane or radon barrier, The Icopal Monarfloor Bridgestop System Kit will ensure the integrity of the barrier from possible damage from mortar droppings.