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  • Celtic Sustainables
  • 01239 777009
  • 9 Parc Teifi Cardigan Ceredigion SA43 1EW


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TrueWool Loft Insulation

Wool Insulation Wales


Prices Include VAT


Prices Include VAT

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TRUEWOOL® is the first 100% wool insulation made from 100% British sheep wool. In fact, the wool is entirely from Welsh Mountain sheep that live in Wales.

The provenance for this loft insulation is 100% known. Wool Insulation Wales Ltd purchase the fleeces that make the wool for their loft insulation through the Welsh Wool traceability scheme run by British Wool (formerly the British Wool Marketing Board). 

The washed fleeces are treated with borax (an natural insect repellent) and machine needle felted into 10m lengths of 50mm deep insulation. All the processes are done in Britain. To increase the depth of the TrueWool loft insulation, simply double or triple up the wool as you lay it between the joists.

TRUEWOOL® does smell a little "sheepy" when you first unwrap it from its packaging, but once aired the smell dissipates. 

If you are unsure how much you require, please call us on 01239 777009 or contact us for a quote. Please note: Prices are per roll.

Did you know that wool fibre helps manage dampness, humidity and moisture?

Managing dampness, humidity, and moisture is crucial to maintain the health of a building and its occupants. Wool fibre has a hydrophobic exterior that doesn't feel wet, while the interior is hygroscopic, meaning it can absorb moisture vapour during high humidity and release it as heat during low humidity. By using hygroscopic materials like wool fibre, you can regulate humidity levels within your building effectively. This water moisture regulation can help lower energy demand and, in turn, further reduce costs (it takes more energy to heat damp air). 

Sheep wool insulation is fully breathable and can manage the conditions of both old and new buildings. Therefore, it is an excellent choice for insulation to maintain a healthy environment in your building.

Key Information

  • Widths: 400 and 600mm
  • Thickness: 50mm thick
  • Length: 10m 
  • Material: 100% Welsh Wool from Welsh Mountain Sheep. Fully traceable via British Wool Welsh Wool Traceability Scheme
  • Density: 16.5kgm³
  • Thermal conductivity: 0.040 W/mK
  • Ignition Point: >520°C
  • Reaction to Fire: EN13501
  • Flammability: ISO19925-2
  • Highly breathable

Thermal Resistance (R Values) m2 k/w at various thicknesses

  • 100mm = 2.516
  • 150mm = 3.774
  • 200mm=  5.032
  • 250mm = 6.29

Further Information

Packaging and Waste Management

TrueWool insulation is packaged in plastic wrap made of Low-density polyethylene (LDPE) - number 4 in the recycling triangle code.  This plastic wrap is 100% recyclable and can be recycled along with plastic bags.

Wool Insulation Wales

Read our blog post about Wool Insulation Wales and their journey to create 100% wool insulation products grown and manufactured in the UK - Wool Insulation Wales - Smart Insulation Naturally.