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STEICO underfloor flex sound insulation underlay


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STEICO underfloor Flex   

Natural wood fiber underlayment for parquet and laminate floorings - made from natural material.

  • Ecological and environmentally friendly
  • Equalizing unevenness up to 3 mm
  • Good sound and noise protection
  • Very strong and Resistant to impact
  • Impact sound damping for multi-layer floors and laminate floors
  • Long-lasting due to the stable fiber structure
Data sheet

Thermal conductivity (0.040 W / mK)
Density (130 kg / m3)
Specific heat capacity (2100 J / kg · K)
Diffusion resistance coefficient (μ = 3)
Format Roll with 1,100 x dl. 10,000 mm / 1 roll = 11 m2
Thickness of 5 mm
Level up to 3mm



Improve your wellbeing with the right insulation

Natural insulating materials for healthier living

"The insulating material that retains the heat" This is the uncommon advantage of STEICO insulating materials. STEICO wood fibre insulating materials can do even more than provide protection against the cold, they are multi-talented contributing more to your well-being and help to provide a healthy dwelling.


Insulation against cold in the winter

The porous structure of the Wood fibre insulation locks in air and offers efficient insulation against a typically cold winter. Whether used in timber or masonry construction, in existing buildings or meeting passive house requirements in a new build, STEICO insulating materials are the ecological solution in all ranges of application.

Summer heat protection

STEICO insulating materials are heavier than many conventional insulating materials. This additional weight (higher gross density) is the key to the summer heat protection. STEICO insulating materials dampen the daily temperature fluctuations through this higher resistance. In the building it remains cooler inside. 
Discover more on this topic here Summer Heat protection.


Sound insulation

Owing to the fibrous structure and the higher gross density of STEICO insulating materials, they are able to make an important contribution to the acoustic performance of the structure. Not only reducing external airborne sound (for example road noise) but also that within the building. With STEICO systems it is possible to reduce the effects of impact sound transfered through the structure


Water vapour open

STEICO insulating materials function as the clothing for the house. Excessive water vapour (e.g. from cooking or showering) can permeate through the structure. This vapour permeability prevents mould and construction damage. At the same time, wax additives create a water resisting (hydrophobic) nature to STEICO products providing effective protection from the elements. Our sarking and sheathing may be exposed for up to 8 weeks as a temporary building covering.


Energy saving and property value increases

With STEICO you will find a comprehensive assortment of insulating materials for roof, floor, wall and fascades in a new building or redevelopment projects. With Steico products, you can dramatically reduce energy consumption while at the same time, increase the value of your property. Example calculations show that during a redevelopment with STEICO products, savings of up to 80%  are possible.


Sustainable and certified products

STEICO Wood fibre insulating materials are manufactured entirely from timber or hemp. The timber is sourced from forest thinnings or as sawmill by-product. The independent FSC® certification (Forest Stewardship Council®) guarantees that the timber used for STEICO products originates from managed forestry. During production, no harmful additives are used. Any additives used are natuarally sourced and their use minimised. All our insulation materials rely on the 'Lignin' inherant in the timber as a bonding agent, rather than artificially introduced resins. With the use of STEICO products you not only reduce the impact on the environment but also improve the environment in your property.


Insulation that's naturally better

With STEICO you obtain well-being in the house: Protection from cold weather, heat and noise, a pleasant internal climate and balanced air humidity making the property particularly Allergy friendly.With these advantages,  we believe our insulating materials to be genuinely multi-talented.


Estimated delivery time 1-3 days