Sheep's wool insulation

ISOLENA Acoustic underlay felt

Density: 100 kg/m³
Application: Interior Room Air Renovation: Suspended (Acoustic-)Ceiling, Sound Proof Ceiling, Floor: Sound insulation, Wooden Construction

Our ISOLENA Acoustic underlay felt is made of 100% wool and is renewable, durable, recyclable and manufactured without synthetic additives.

  • Sound absorber as support for horizontal and inclined surfaces.
  • Footfall sound felt for full-area installation or as a strip for sound insulation between the underfloor and the construction.
  • Natural mottled yurt felt for the side wall and roof.
  • Full-area installation of the sound felt and fixation through lateral stapling.

Form of delivery

We manufacture ISOLENA Acoustic underlay felt in the following standard dimension:

  • Art-Nr.: 150026
  • Thickness: 9 mm
  • Width: 1000 mm
  • Length: 10000 mm
  • Item/PU: 1 item
  • kg/PU: 9,00 kg
  • m²/PU: 10,00 m²
  • Form of delivery: 1 item or Pal22 = pallet with 22 pcs. (0,55 ldm)


Technical data

Nature Plus® 0103-1006-099-1 Download
Vapour diffusion resistance factor μ 1  
Specific heat capacity c 1760 J/kgK  
Length-related flow resistance according to EN 29053 r = 29,5 kPa s/m²  
Fire behaviour according to EN 13501-1 C-s2, d0; CH: RF2  
Assessed degree of sound absorption D. 50 mm according to ÖNORM EN ISO 11654 αw = 0,30  
Mould growth intensity according to EN ISO 846 0  
Dynamic stiffness as per ÖNORM EN 29052-1 62,1 MN/m³  

Ecological parameters

ISOLENA insulation materials have the following ecological parameters according to the NaturePlus® life cycle analysis report:

  • Use of non-renewable primary energy without the non-renewable primary energy carriers used as raw material (PENRE
    [MJ, lower calorific value]):  23,44 MJ/kg
  • Global warming potential Total of GHG emissions and CO2 storage (GWP 100 total): 0,83 kg CO2-equiv./kg
  • Acidification potential of soil and water (AP): 4,63E-03 kg SO2-equiv./kg
  • Potential for the formation of tropospheric ozone (POCP): 8,04E-04 kg C2H4-equiv./kg
  • Eutrophication potential (EP): 2,08E-03 kg PO4³-equiv./kg

IONIC PROTECT® Wool protection

IONIC PROTECT® is a biocide-free process developed by ISOLENA and protected by a trademark patent to protect wool.

Plasma ion treatment of the wool fibres protects them from all negative influences that can occur in construction. This gives moths and insects no chance to thrive. In addition, our products can be stored indefinitely thanks to the wool protection.

We present you with these terms in writing with the ECO/CUAP test report ECO-P16002-15017 and our product promise.



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