Exton SRS Impactafoam is designed to form a resilient layer reducing impact noise transmission in concrete and timber floors. It is an inert cross linked closed cell polyethylene foam, therefore providing a vapour barrier with good compression strength. In a concrete construction, it is laid as a membrane between a structural concrete floor of mass 300Kg/m2 and the finishing screed. For a raft floor construction Exton SRS Impactafoam batten strips are applied to the underside of the timber battens. Both methods conform to Building Regulations Approved Document E for impact sound insulation. In a conventional timber construction self adhesive batten strips are easily applied to the top of the floor joists. This forms a resilient layer between the joists and the boarding, reducing impact noise.