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Wool is a natural fibre from a fully renewable resource and consequently the life cycle of Thermafleece has minimal environmental impacts. And whilst it's gives a K-value of 0.039 W/m.K which compares favourably with that of other fibrous insulants, it's pleasant and safe to handle and offers a range of additional benefits that derive from it's nature, particularly from the way in which it interacts with moisture.... 
Thermafleece does far more than simply insulate your building. In addition to its inherent thermal efficiency, it also:
- improves air quality
- provides acoustic insulation
- regulates air temperature
- regulates air humidity
- controls condensation
- has minimal embodied energy
- is safe and healthy to install and to live with
- is durable
- is recyclable
IMPROVING AIR QUALITY
Few materials have wools ability to obsorb indoor air pollutants, including those chemicals and Volatile Organic Compounds [VOCs] that are given off by paint and construction timber, including formaldehyde. The abilities of Thermafleece in this regard have been proven by thorough academic research.
The Building Research Establishment [BRE] have shown that more than 200 pollutants are present in indoor air at 10 times the levels thatr they occur outdoors. Thermafleece naturally absorbs many of these by chemically bonding with them, usually permanently, rendering them harmless.
0ISE DAMPENING AND SOUND INSULATION
Thermafleece shows excellent acoustic absorbtion properties, particulary over the frequency range of human speech. Instaled within internal and stud partition walls, it therefore contributes greatly to comfort levels.
COOL IN SUMMER
When the outside temperature increases and begins to heat the wool, it releases moisture; that has a cooling effect on the fibre which reduces the flow of heat to the inside of the building. This can reduce peak temperature by up to 7 c when compared to buildings in which alternative forms of insulation are installed.
WARM IN WINTER
In the winter the absorption of moisture by wool insulation can increase peak temperature by up to 4 c when compared to buildings in which alternative forms of insulation are installed.
NATURALLY BREATHABLE
Thermafleece, being hygroscopic, can absorb and desorb water vapour without compromising its thermal efficiency. It is therefore ideal for use in roofs and timber framed walls designed to avoid a damaging build-up of moisture by allowing water vapour to migrate through the structure. In this type of construction, Thermafleece is the perfect partner for a vapour-permeable breather membrane used on the cold side of the thermal insulation to prevent the infiltration of cold air and wind driven rain and dirt. Heat loss by convection is also substantially reduced because the insulation is protected by the breather membrane preventing air movement across the surface.
CONDENSATION CONTROL
Wool generates heat when it absorbs moisture from the air. That energy is known as the heat of sorption and accounts for the warmth felt by wearers of woollen clothes in winter conditions. When the air is saturated with water vapour, wool absorbs some 40% of its dry weight in moisture, producing 960 kilojoules of heat energy for every kilogram of dry wool. This warmth is not noticeable inside the building but it acts to prevent condensation in construction cavities by maintaining the temperature above the dew-point in damp conditions.
ENERGY EFFICIENT
The cleaning, laying and thermal bonding processing during the manufacture of Thermafleece consumes minimal energy. Thermafleece uses only 14% of the embodied energy that is used to manufacture glass fibre insulation, therefore paying back its manufacturing energy cost seven times faster than glass fibre.
 HEALTHY
Thermafleece is harmless and can be installed without gloves or protective clothing. It is not irritating to the skin, eyes or respiratory tract and causes no discomfort to site workers during installation. Any fibres which happen to reach the living space will present no hazard to health. The necessary insect proofing and fire resistance rating is achieved by the inclusion of naturally derived additives.
EXTREMELY DURABLE
The fibre adapts to the shape of rafters, joists and studs to provide a permanently tight fit. Properly installed, Thermafleece will retain its low density and thermal performance - with a life expectancy similar to that of the construction in which it is installed.
RECYCLABLE
At the end of its useful life, Thermafleece can be recycled for other environmentally friendly applications. Thermafleece contains no permethrin, pyrethroids, pesticides or formaldehydes.
Thermafleece is manufactured in batts of 1200 mm long and either 400 mm or 600 mm wide.
A range of three thicknesses are available - 50 mm, 75 mm and 100 mm enabling any overall insulation depth to be achieved by combining different thicknesses.
Thermafleece is sold in packs - 50 mm thick covers 20.16 square metres, 75 mm thick covers 12.96 square metres and 100 mm thickcovers 10.08 square metres.
Click here for the product brochure pdf.
Click here for a copy of the British Board of Agrement [BBA] certificate.
Click here for a copy of the Accoustic specification.
Click here for a copy of the Clean Air brochure
TECHNICAL SUPPORT AND SERVICES
We can offer a full, FREE, U Value [thermal efficiency] assessment of your property and also professional consultancy relating to acoustic issues and any questions you may have, all over the phone. Please contact us if you wish to use these services.
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