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This will depend on where the insulation is installed and the energy efficiency you need to achieve.  If you are upgrading your loft, the more insulation you can install the better, but typically you should install at least 240mm of THERMAFLEECE or THERMAFLEECE EcoRoll.

THERMAFLEECE contains 85% British wool and 15% polyester binder.  THERMAFLEECE EcoRoll and TF35 contain 75% British wool, 15% recycled polyester loft agent and 10% polyester binder.  The polyester binder contains at least 50% recycled material.

Very easy and you can easily install it yourself.  See our installation section for guidance. 

Our wool insulation will last the lifetime of the building in which it is installed.

Prices are available from our suppliers.  Prices will vary a bit but in general THERMAFLEECE can pay for itself within a few years.

The price of other insulation varies greatly so it is difficult to make an exact comparison.  Because THERMAFLEECE is certified for the life of the building, there are no replacement costs so the cost of insulating with THERMAFLEECE may actually be lower than many other materials over the life of the building.  THERMAFLEECE will typically pay for itself within 4 years.

Very well.  THERMAFLEECE Original  and EcoRoll are approximately 10% more thermally efficient than low density glass fibre insulation and THERMAFLEECE TF35 is more than 20% more efficient.

The new Building Regulations introduced in October 2010 require different amounts of insulation depending on the type of construction. For advice on how to meet the regulations please ring our Technical Help Line on 0844 800 9953.

Grants vary greatly from area to area. The best way to find out about grants in your area is to contact your local energy advice centre. They can be contacted on 0800 512 012.

THERMAFLEECE will not contribute towards the developmental stages of fire.  Our insulation complies with British Standard BS 5803-4 for flammability and resistance to smouldering.

The wool we use contains a borax based fire retardant and does not require the addition of an insecticide.  Hemp fibres are not susceptible to moth attack.

THERMAFLEECE is at no greater risk of damage from rodents than any other insulation.

Yes, THERMAFLEECE could be recycled back into insulation or bedding.

The wool component of THERMAFLEECE will biodegrade but the polyester component is not biodegradable.

Because THERMAFLEECE is so safe, you could use any off-cuts for all sorts of things.  Here are a few suggestions; pet beds, hanging basket liners, plant and tree protection.

THERMAFLEECE can be cut using a straight scalloped edge and a Stanley knife or it can be simply torn.

Yes.  The amount of THERMAFLEECE you need to use will depend on how much insulation is in place. For further advice please ring our Technical Help Line on 0844 800 9953.

Yes, our wool insulation has British Board of Agrément (BBA) approval for pitched roof, loft and timber frame applications.  You can get more advice on how to meet Building Regulations by telephoning our Technical Helpline on 0844 800 9953.

No.  All our wool is purchased through the British Wool Marketing Board scheme.

Sometimes THERMAFLEECE can have a faint odour of sheep.  This is not unpleasant but may be more pronounced if the insulation has been stored in a damp place.

No.  Sheep are clipped in the summer when the residues of sheep dip are at their minimum levels within the fleece. Any subsequent traces of sheep dip are removed during the washing process.

The binder is required to ensure that the insulation maintains its shape throughout its service life. There are no natural materials available that can do this.   Every effort has been taken to ensure that the virgin polyester content of the product is kept to a minimum.

Our insulation is not a controlled substance under the COSHH regulations. However, we have prepared a Material Safety Data Sheets for our insulation which are available on request.

There is no evidence to suggest that wool can cause allergies.  Individuals who are sensitive to wool may be affected by close or prolonged contact with the product.

Insulation of any type should not be laid directly over the lights since most recessed lights are designed to have airflow around them. An air gap is necessary to prevent over-heating of the fittings. This is true for all types of insulation. Some recessed lights have heat shields so insulation can be laid around the fitting. It is advisable to check which type of recessed fitting you have before laying insulation. It is advisable to check with a qualified electrical engineer regarding your type of light fitting.

The protein building blocks in the wool fibres react in a complex and permanent way with formaldehyde molecules.

If you have any suggestions or advice you would like to add to our FAQ page please don't hesitate to contact us