Lambswool is specifically specified as Loft Insulation for
Older, Traditional and Listed property's 


Making use of Natural Fibre Insulation materials that were in use at the time of construction 

Mr & Mrs Williams, the proud new owners of this cold little Cambridgeshire 19th Century Cottage contacted RJ Ipswich to insulate the Loft and provide a storage solution.

The Insulation of choice was Lambs Wool, the storage solution of choice was StoreFloor.

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A Cold Loft Insulation using Lambswool.

Based on your storage requirement, part or fully boarded, we can install StoreFLOOR, the only BBA approved loft storage system on the market today.

A 12th Century property in desperate need of Loft Insulation
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From this. . . 
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To this. . . 
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Insulation for Traditional Property

Pre1920's

The Benefits of a Great Installation

Many owners of older properties are familiar with the importance of breathability and using breathable natural fibre insulation (NFI). There are many additional reasons for using insulation made using materials such as sheep’s wool, wood fibre, hemp and straw.

NFI’s breathe in a way no other insulation does. Not only is natural fibre insulation highly vapour-permeable, the fibres bind and release water molecules like tiny magnets depending on the humidity of the surrounding air. When this happens, the moisture is bound in a much less harmful form than liquid water droplets. This enables NFI to be truly breathable, helping prevent the accumulation of harmful moisture and ensuring the insulation performs consistently across a wide humidity range.

Most of us recognise the importance of insulation in preventing heat loss, saving energy and reducing operational carbon (the sum of the energy needed to heat, cool and light a property), but fewer connect insulation with other aspects of building performance. Insulation can account for more than 50% of the volume of the building fabric so it’s important to appreciate what insulation does. In fact, insulation and NFI’s in particular play a significant role in many aspects of a building’s performance,  including energy efficiency, heat gain, acoustic comfort, sustainability, moisture balance, indoor air quality, buildability, durability and fire performance.

Rigid insulation is particularly good for insulating under rafters in roofs.

Because the insulation does not need to be supported within timbers, a continuous layer of insulation can be achieved which eliminates thermal bridging. The most common rigid insulation is wood fibre or cork. Wood fibre is more widely available and cost efficient. Cork is also becoming a popular choice.

When it comes to upgrading the thermal performance of existing buildings, it is important to look at each property on its own merits. The choice and availability of natural fibre insulation such as wool, wood, hemp and straw has never been greater. With these established technologies and expertise within the UK, RJ Ipswich are able to provide comprehensive support to clients to ensure the most appropriate products and systems for each building.

The 5 Benefits of Lambswool Insulation
1. Lambswool can hold up to 40% of its own bodyweight in moisture, without it affecting its insulation properties.
For thousands of years sheep have been able to survive the elements using their wool coats to protect them from extreme cold and heat. Due to the crimped nature of wool fibres, they form millions of tiny air pockets that trap air, giving phenomenal insulation properties. 
2. Lambswool purifies the air.
Wool is a natural protein made up of a number of different amino acid chains (18 to be exact!) of which 60% have a reactive side chain. These reactive areas allow the wool to absorb harmful and odorous substances including Nitrogen Dioxide, Sulphur Dioxide and Formaldehydes and neutralise them through a process known as Chemisorption.

So using the Lambswool as insulation also has health benefits and creates an excellent indoor climate.

3. Asthma or breathing problems?
The floating fibres of Fibreglass and Rockwool may cause damage to lungs and eyes. Therefore it is always recommended that a respirator and googles are worn at all times during its installation. 
Lambswool is safe and harmless, is incredibly easy to work with and is itch free.
4. Lambswool insulation is a Natural product, almost Carbon Neutral & highly sustainable.
From shearing to the manufacture of Lambswool insulation, it takes less than 15% of the energy used to produce the equivalent of fibreglass insulation. 
5. Is Lambswool fireproof?
Lambswool will start to burn in temperatures of 560 degrees C or above. Below that, as in almost always, it will only smoulder and will not transfer flame. 

Ron Spence

 RJ Ipswich's Traditional homes Insulation Expert

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Fully Qualified

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What it says

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