Wood fibres and chips

Wood fibre is obtained from shredded small-diameter wood or wood waste from spruce or pine trees. It is pressed into panels (dry or wet process) or used as loose fill.

Wood fibre insulation has a thermal conductivity of λ = 0.045 to 0.06 W/mK. Wood wool lightweight panels reach approx. λ = 0.09 W/mK.

Wood chips, on the other hand, are made from shavings of spruce and fir timber, from which dust must be removed; the chips can then be used as insulation material in timber structures in combination with clay, for example.

Wood chips and fibres can absorb a good deal of moisture without their insulating effect diminishing.

Wood chip insulation panel (source: GrAT)

Wood fibre insulation panel (source: GrAT)