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SheepWool Insulation – Comfort Rolls

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SheepWool Insulation – Comfort Rolls

(2 customer reviews)


The Comfort Sheep Wool insulation is perfect for insulating between floor joists. It comes in two widths, 380mm and 570mm in order to fit between standard joist widths that are 400mm and 600mm wide respectively. It comes in two thicknesses, 100mm and 150mm, for layering as per your insulation requirements.

Raw density: 14kg/m3
Thermal conductivity: tr 0,042 W/mK

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The SheepWool Comfort insulation is the most cost effective sheep wool insulation in our range. It comes in two thicknesses, 100mm and 150mm. It comes in two widths to fit standard spaces between joists: 380mm and 570mm in order to fit between standard joist widths that are 400mm and 600mm wide respectively. It’s lightly felted so it is suitable for insulating floors but isn’t recommended for wall or ceiling applications. It would sort of fall to bits on you if you tried this. It’s recommended to use the Comfort Sheep Wool insulation in two layers: one to fill the gaps between the joists, and the second to go across the top.


Sheep wool is the perfect natural insulator. It’s made by the same company that magics our Herdwick wool into mothproof felt for our Chimney Sheep. They make three different densities of insulation that are suitable for different applications. It is made of 100% wool without any plastic fibres that many other sheep wool insulations have.
This makes it a bit more expensive but it is 100% wool, 100% mothproof, 100% chemical free.

It is safe to handle and apply, requiring no gloves, dust mask or safety equipment. It will last for decades but at the end of its life can simply be composted. There are no plastic fibres or chemicals in any of the SheepWool Insulation® products.

They have all been moth-proofed using the patented and very clever Ionic Protect® treatment.
This changes the ionic charge of the wool fibres, so that moths don’t even recognise it as wool and fly on by. Other moth deterrents rely on the moth larvae eating a little bit of the product in order to be poisoned by the treatment – this means a little bit of it deteriorates each time a moth larvae chews on it. Not with the ionic protect. It looks like wool to us, behaves like wool for us – it is wool! but clothes moths and carpet beetles are tricked into looking elsewhere to dump their load of eggs to hatch into a hoard of wool munching monsters.

All the insulation products are designed to fit between standard joists 400mm and 600mm apart, so all the rolls are 380mm and 570mm wide to fit snugly between the joists. The narrower rolls are sent in packs of 3, and the wider ones in packs of two.

Where should the Comfort Sheep Wool Insulation be applied?

The Comfort Sheep Wool Insulation is designed to be applied between and over rafters in floors / ceilings, ie laid horizontally. Have a look at this diagram to see where the different types of wool insulation should be fitted: 55200-Sheepwool Insulation-Brochures 4pp A4

What other sheep wool insulation products are available?

As well as the Comfort range, there is Optimal and Premium.

Optimal comes in 50mm and 75mm thicknesses, and is smoothly felted on one side for stapling to vertical surfaces. It’s also good for giving a top-up to existing insulation. It’s a medium density sheep wool insulation being  18kg per cubic metre. It has a thermal conductivity of tr 0,0385 W/mK

Premium comes in 100mm and 150mm thickness. This has a unique pleated construction which means it has excellent insulation properties, doesn’t compress over time, and can be used easily in horizontal, vertical and sloping applications. It has a density of 20kg per cubic metre and thermal conductivity of tr 0,0359 W/mK.

What are the benefits of wool?

Ever so many! Here are but a few.

Wool has excellent insulation properties, keeping buildings warm in winter and cool in summer.

Wool is an excellent natural sound absorber and sound insulator.

Wool is hygroscopic, so it will readily absorb water from the air. If you’ve got a damp home, the wool can help absorb moisture then wick it away when there’s enough airflow to dry it out. It can absorb up to 33% of its own weight without feeling damp.

Wool is hypoallergenic – it is resistant to bacteria, mould and mildew that can trigger allergic reactions in many people.
Wool is naturally breathable, allowing air and moisture to move and circulate in a space (purifying air that moves through the wool), but still insulating and keeping your home warm. Think of it like a nice feather duvet, that keeps you snug and warm but still permits moisture and air to percolate through.

Wool absorbs VOC’s – high volatile compounds – such as formaldehyde. These are in the air all around us, especially in new products and furniture, things that have been varnished, things that smell “new.  The VOC’s bind permanently with the keratin in the wool fibre. Read more about it here.

What’s wrong with VOC’s?

They can cause irritation to eyes, nose and throat. They can cause shortness of breath, headaches, fatigue, nausea, dizziness and skin problems. Higher concentrations of VOC’s may cause lung irritation, and damage to the kidneys, liver and central nervous system.


2 reviews for SheepWool Insulation – Comfort Rolls

  1. Philip


    Great to use, clients loved it, no chemicals and still no moths! Only gave it a 4 star as it arrived in a flipping giant plastic bag – gotta sort this out guys.

  2. Lyn

    ecological alterative to nasty rockwool

    At last an ecological, long lasting alternative to rockwool and a great use of fleece from our native sheep to support british farmers. Cannot comment on performance as yet, but received excellent personal service from Susan at Chimney Sheep. Arrived well packaged and earlier than estimated. Looking forward to a snug winter and a cool summer.

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