Icopal acoustic wall approved by Robust Details

A system developed by the Monarfloor Acoustic Systems division of Icopal has been approved by Robust Details as the first four-credit separating wall for the Code for Sustainable Homes.

Bridgestop (E-WM-19) is an acoustic system that isolates the two skins of cavity party walls, preventing an acoustic bridge by the collection of mortar at the base of the cavity - the key cause of acoustic test failure.

It isolates the party walls from the concrete sub-floor, eliminating acoustic flanking, and where used with a methane or radon barrier ensures the integrity of the barrier from possible damage from mortar droppings.

Bridgestop's properties have high acoustic damping to absorb more sound energy and reduce structural flanking, performing approximately 4-5dB better than solid walls and 8dB better than standard Robust Detail E-WM-4 walls.

Research by Icopal has shown cost savings can be made in materials and labour as the party walls only require plasterboard of 8kg/m instead of 12.5kg for solid Part E solution walls, saving 4.5kg/m of gypsum-based board per m.

Time is also saved through easier detailing for step and stagger constructions.

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