Wool Insulation products by Sheep Wool Insulation - Natural, Economical and Safe.
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Natural Insulation for your construction, superior thermal and acoustic performance.
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Comfort Insulation Rolls

1.0 Product Charateristics

1.1 Product Image: See picture.

1.2 Product Description: Sheep Wool Insulation Comfort is a dark-grey coloured wool based thermal / acoustic insulation product, suitable for use in a variety of construction situations and is available in a variety of dimensions.

1.3 Raw Materials: Pure New Sheep’s Wool, Thorlan IW insect protection.

1.3.1 Wool: Wool used in the creation of the product is pure new sheep’s wool. The wool is primarily fine black fleece wool, sourced from Ireland, the UK and continental Europe. Black wools maintain all the desirable characteristics of white wools, but are less expensive due to limitations of the colour in the dying process. The final colour of the product is dependent on the blend used during production and is likely to vary. Wool fibres have many overlapping scales which make them very flexible and create a memory-effect, where after significant compression, wool will return to its original shape. Wool fibres are hygroscopic by nature and will have a moisture weight content of up to 35%, dependent on the relative humidity of the surroundings. While absorbing this moisture, wool releases energy in the form of heat, thus raising the temperature of its surrounding areas. Naturally releasing this moisture in the warmer seasons, wool creates a cooling effect on the same surroundings.

1.3.2 Thorlan IW: Thorlan IW is applied at a level of at least 1% on weight of wool. Thorlan is a titanium based treatment which does not evaporate or diminish with time and remains with the fibre during it’s entire period of use as insulation or in storage prior to that. It is applied chemically to the wool fibre and cannot be removed mechanically. Thorlan IW is not destroyed by washing, humidity or by long continued exposure to UV-radiation. The active substance is not inclined under usual conditions to sublimation. The production of the active substance takes place in a standardised procedure. The product quality is constantly supervised. Thorlan IW is in the European Union chemical law register of certified products.

1.4 Product Dimensions: The following product dimensions are standard production sizes. Custom lengths, widths and thickness are produced on request.

Product Code

Thickness–T (mm)

Width-W (mm)

Length-L (mm)

Area (m2)



380 (x3 rolls)





380 (x3 rolls)





570 (x2 rolls)





570 (x2 rolls)



1.5 Product Density: Nominal density of ~15 kilograms per cubic metre (~15kgm-3)


2.0 Tests and Investigations

2.1 Thermal Conductivity:  Thermal conductivity values of Sheep Wool Insulation Comfort has been measured as follows:

Measured Thermal Conductivity (λ): 0.042 W/mK
Thermal Conductivity – Estimated CE Certification Standard (λ): 0.0420 W/mK (Climatic Chamber Test In Process)

2.2 Flame Retardancy:  Sheep Wool Insulation Comfort has achieved a B2 fire protection classification in accordance with DIN 4102.  CBE Test equivalent: E

2.3 Product Certification: Sheep Wool Insulation Comfort is suitable for use in attic (loft) floors, flat roofs and ceilings. A sample label is shown.

2.4 Technical Data Table:

Thermal Conductivity

0.042 W/mK  (Est. 0.042 W/mK CE Mark)

Water Absorption @ 100% RH

~ 35%

Ignition Point

560 °C

Fire Resistance Classification (DIN 4102)



~ 14kg/m3

Water Vapour Diffusion Resistance

m = 1

Sound Absorption (DIN 52212: s=120mm)

0.95 @ 500Hz

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