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SRS - Impactafoam Acoustic Foams
Impactafoam is designed to form a resilient layer reducing impact noise transmission in concrete and timber floors. Impactafoam is an inert cross-linked closed-cell polyethylene foam, therefore providing a vapour barrier with good compression strength. In a concrete construction, Impactafoam is laid as a membrane between a structural concrete floor of mass 300Kg/m2 and the finishing screed. For a raft floor construction Impactafoam batten strips are applied to the underside of the timber battens. 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.
Weighted impact sound pressure level (L) ISO 717 Impactafoam laid onto a structural floor of mass 384kgm2 with screed laid over.
- 50mm screed Lnw=61dB
- 70mm screed Lnw=60dB
- 100mm screed Lnw=58dB
Test carried out at acoustical House EMPA, Dübendorf. Date of test 18.5.88
- Impactafoam Reduces impact noise
- Impactafoam is only 5mm thick
- Impactafoam offers high compression strength
- Impactafoam is easy to lay and cut
- Good vapour barrier
- Good chemical resistance
- Impactafoam does not deteriorate or mildew
Impactafoam is made up of thousands of tiny cross-linked cells. Therefore even if some cells become punctured Impactafoam continues to perform, with good compression strength and low thickness loss.
