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Thermafleece UltraWool Insulation Slabs


For a natural insulation offering ultra-efficient properties then look no further than Thermafleece UltraWool. When space for your insulation is at a premium, this high density insulation which is rich in sheeps wool is the ideal choice. With a density of 31kg/m ³ Thermafleece UltraWool also offers exceptional acoustic performances in wall, floor and roof systems.

Research shows that using 75% wool in combination with recycled fibres outperforms alternative products with a higher percentage of wool. The wool rich blend offered by Thermafleece ensures you get the full benefit of sheep wool with enhanced performance, durability and sustainability.

  • With a Thermal Conductivity of 0.035 W/mK, Thermafleece UltraWool is the best performing natural fibre-based insulation on the market.
  • Energy savings from using Thermafleece UltraWool mean it can pay for itself in a few years.
  • Made in the UK - containing British Wool
  • Contains a lofting agent to maintain durability, fibre stability and structural integrity.
  • Can reduce CO2 emissions by many tonnes over the lifetime of use. Wool also fixes carbon dioxide helping reduce greenhouse gas levels.
  • Safe to handle and can be recycled or safely disposed of at the end of its life.
Technical Info
Technical Info
Thermal Conductivity 0.035 Wm-1K-1
Density 31 kgm-3
Water Absorption   (@100% RH): 24% w/w
Specific Heat Capacity 1800 Jkg-1K-1
Mould Resistance CUAP 2002-01-25 Pass
Moth/Beetle Proofing ISO 3998 Pass
Vapour Resistivity 9 MN ·s ·g-1m-1
Ignition Point >500oC
Spread of Fire to BS 5803-4 Pass
Recycled Content 20%
Recyclable Yes
Thermafleece UltraWool pack sizes
Product Dimensions (mm) Items per Pack m2 per Pack
50 x 390 x 1200 30 14.04
50 x 590 x 1200 20 14.16
70 x 390 x 1200 21 9.83
70 x 590 x 1200 14 9.91
90 x 390 x 1200 18 8.42
90 x 590 x 1200 12 8.5

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