Description

Wood fibre is not just an insulator: it is an active thermal mass. By using the natural hygroscopic and thermodynamic properties of wood, this material transforms the building envelope into a breathing lung capable of managing comfort in both summer and winter.

01The wet and dry processes

The wet process exploits the natural lignin contained in wood to bind the fibres without synthetic glues; the resulting panels are stiffer and denser (up to 270 kg/m3). The dry process uses a minimal percentage of resins or polyolefin fibres for lighter, more flexible panels. In both cases, the material is a carbon sink: during its life, the tree has absorbed more CO2 than is emitted to produce the panel.

02Thermal lag and hygrometry

Wood fibre has a very high specific heat capacity (2100 J/kgK): it accumulates the sun's heat without immediately overheating. Thanks to this lag (often > 12 hours), the afternoon heat peak reaches the interior only at night, when it can be dissipated with natural ventilation. Furthermore, wood fibre (mu = 3-5) lets vapour pass through, regulating indoor humidity.

Technical identity

Standards

European and international references applicable.

EN 13171FSC / PEFCNatureplusCAM Edilizia

Physical properties

Vapour diffusion factor (mu)3 - 5 (Traspirante)
Compressive resistanceFino a 200 kPa
Reaction to fireClasse E / B-s1, d0
Elastic modulusDipende dalla densita'

Usage environment

Wood fibre is combustible (Class E): on facades above 10 metres, regulations may require a mineral render (lime-silicate) or a rock wool fire barrier strip at each floor level before it can be certified.

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