wood wool panels

 Application of wood wool boards at a glance
What are wood wool boards and what different variants are there? What are the properties of wood wool boards? For which insulation projects are they suitable,
which ones are not?

Wood wool boards for insulation are also commercially available under the name "wood wool lightweight building board" which was common until the introduction
 of the EU insulation standard at the beginning of June 2013 and the corresponding abbreviation "HWL". The old name did not characterize the insulation panel
itself, because it is by no means as easy as its name suggests. On the contrary: Such wood wool boards, as they are now correctly called, are among the
heavyweights of their kind. Because they contain as a binder not synthetic resin such as chipboard, which makes them quite lightweight, but heavy cement,
magnesite or gypsum.

How to make wood wool boards from wood
Wood wool boards are suitable for indoor applications, underground garages and cellar ceilings. Knauf Insulation wood wool panels bear the Blue Angel
because they are particularly low in emissions.
Wood wool boards are suitable for indoor applications, underground garages and cellar ceilings. Knauf Insulation wood wool panels bear the Blue Angel
because they are particularly low in emissions.
Incidentally, this type of bonding of wood wool fibers with cement & Co. has a long tradition. As early as 1925, wood-wool had either been formed into sheets
with magnesite or in a so-called cement container. In particular, the second-mentioned technology is still used worldwide today.

Who now thinks woody wool panels on airy-cuddly wood fibers, is more than off the mark. For wood wool boards these fibers are namely pressed together
 with a suspension of the aforementioned binders. The result: a solid, hard and heavy plate. The wood wool, which is used for the production of wood wool
boards, comes mostly from local woods, especially softwoods such as pine and spruce. In order to make wood wool out of the well-dried trunks,
a wood wool machine is used. The resulting strikingly long fibers are usually impregnated against fire.

Good to know: Although preservatives such as formaldehyde, which has been classified as "probably carcinogenic in humans" since April 2015,
and fungicides have not been used today, wood wool panels are considered to be robust to:

humidity
rotting
insects
mushrooms
and fire.
Insulating properties of wood wool boards
Due to their structure and the raw material wood, which is a renewable raw material, wood wool panels insulate heat quite well. A wood wool board comes to
a thermal conductivity of 0.09 watts per meter and Kelvin. It is true that the higher the heat permeability, the lower the insulating effect. For comparison,
a wood fiber insulation board has a thermal conductivity of 0.04 to 0.045 watts per meter and Kelvin.

You have to know: Before the beginning of the "global career" of insulating materials made of plastic such as polystyrene (known trademark of BASF SE:
Styrofoam) was mainly on wood wool panels for thermal insulation back. As such, they have lost in importance in the course of the massive use of styrofoam,
but they used reinforced wood wool panels in plastered form for sound insulation. In public buildings with high noise pollution such as schools, sports halls,
concert halls or cinemas, for example, unplastered wood wool panels have proven to be effective in absorbing (absorbing) sound.

 Clad with plaster, wood wool panels insulate the sound, without plaster they absorb it.

Their open pore structure in open condition and the at best fine wool texture predestined them for it. At the same time, both structural properties
 make the panels a decorative design element of the rooms.

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