THERMAFLEECE is a new, exceptionally effective and very environmentally friendly natural insulation product manufactured from the wool of lakeland hill sheep (Swaledale, Herdick, Welsh Mountain & Scotch Blackface).
This pack is contains batts 600mm wide by 50mm thick and 1200mm long, but 75mm and 100mm thickness can also be selected from the menu above. Please note - these packs are very bulky and therefore very expensive to ship. For this reason we get this product despatched directly from the manufacturer to minimise unnecessary costs but even so please expect high shipping charges.
Joist and rafters are normally spaced either 400mm or 600mm apart and 400mm wide batts are also available in 50, 75 and 100mm thicknesses. If you need the narrower batts, please select the 400mm wide Thermafleece product range also available on the site and choose the thickness required.
Pack sizes, coverage and cost per sqm for the 600mm wide range are as follows:-
|
Thickness (mm)
|
No. of batts
|
Coverage m2
|
£/m2 (inc VAT)
|
|
50
|
28
|
20.16
|
£5.59
|
|
75
|
18
|
12.96
|
£8.37
|
|
100
|
14
|
10.08
|
£11.16
|
Wool has remarkable thermodynamic properties, which coupled with its ability to rapidly absorb and release water vapour (hygroscopic), make it ideal as an insulating material; properties that enable sheep to stay cool in summer and warm in the bleakest of lakeland winters. It is of course also an entirely natural and renewable product and uses only about 15% of the energy in its manufacture when compared with conventional insulation materials such as mineral wool quilt.
THERMAFLEECE is manufactured to a density of 25kg/m3 giving a K-value of 0.038 W/m.K. and is suitable for use as loft, wall and under-floor insulation in both new-build and refurbished property. It offers the customer an alternative environmental and technical specification and can be used in a wide variety of roof, wall and floor construction.
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, air-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. 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. The full THERMAFLEECE brochure and full technical specification can be viewed by following the links below.