FAQS: 100% Sheep wool insulation

Why should I use sheep wool insulation?

• First of all, sheep wool is completely safe for the user and the environment, because it’s the natural choice!  Our 100% sheep wool is chemical-free, and can be disposed of easily at the end of its useful life. Wool insulation contains the least ’embodied energy’ of any insulation available, meaning that in a very short time, it will save more energy than will have gone into its production.
• One of the best things about 100% sheep wool insulation is that it is hygroscopic, meaning it can absorb moisture without its insulating qualities being affected.
• It won’t spread fire, as it is self-extinguishing.
• Unlike some other types of insulation that shed fibres, sheep wool won’t get thinner and need ‘topping-up’ over time.
• Most importantly, you won’t find a better insulator! It has a lower conductivity value than mineral wool and glass wool. This means very little air is able to pass through it. The natural crimped fibres of sheep wool trap air, meaning more heating will be kept in the main body of your home, rather than passing through into the ceiling.

How much sheep wool insulation do I need?

The thickness of sheep wool insulation you will need depends on building regulations, as well as the average temperature you’re hoping to achieve. Regulations require a minimum of 120mm thick of sheep wool insulation for attics in existing panels – this is two layers of 60mm. However, we would normally recommend 160mm, depending on how warm you like to keep your house!

For new builds and very old or draughty buildings, the regulations are different, so it’s always best to get expert advice!

Can I use sheep wool alongside existing insulation?

Yes – just roll the sheep wool out on top! As well as helping to keep your home warmer, this will have the added benefit of helping to seal in the fibres in fibreglass or mineral wool insulation, stopping them flying around and potentially causing irritation. Just be careful to wear protective equipment if you’re handling anything other than sheep wool!

Where should I put sheep wool insulation?

It depends whether or not you’re planning a room in the roof. In this case, you should insulate the roof. If you are just going to be using your attic for storage, it’s best to insulate the floor – or you’ll end up spending money pointlessly heating the roof space. Lay down the insulation rolls with boards on top of them, and put any boxes on top. This way, you won’t squash the insulation and potentially affect its performance.