DAMTEC® estra

Ideal acoustic underlay under floating screeds, concrete slabs or underneath rigid floor elements

DAMTEC® estra is the ideal rubber underlay in floating screed / concrete slab systems with European Technical Approval, which has been granted by DIBt, the German Center of Competence in Civil Engineering. Another application is for example underneath rigid floor elements on wooden sub floors. Also as edge strip it can be cut. DAMTEC® estra is particularly quick and easy to install and is providing extremely high resistance to compressive loads and outstanding elasticity. It is equally well suited for applications in residential, office and commercial buildings.

DAMTEC estra Aufbau

Technical Data

granules of rubber with PU elastomer bonding agent
Roll width
1,250 mm (± 1.5 %)
Roll length
4mm: 20,000 mm (± 1,5 %)
6mm: 10,000 mm (± 1,5 %)
8mm: 8,000 mm (± 1,5 %)
4, 6, 8 mm (± 0,3 mm)
680 ‐ 750 kg/m³
Impact sound improvement
(ISO 140‐8/ISO 717‐2)
ΔLW = 19 dB for 4 mm (with 50mm screed)
ΔLW = 19 dB for 6 mm (with 35mm screed)
ΔLW = 20 dB for 6 mm (with 50mm screed)
ΔLW = 21 dB for 8 mm (with 50mm screed)


Data sheet PDF
Installation instruction PDF