Feefo Gold Trusted Service Award Winner 2026
Unrivalled Choice of Trusted DIY & Trade Brands
Over 40,000 DIY supplies delivered nationwide*

SheepWool 100% Natural Optimal Insulation (18kg/m^3)

Configure Product
Select options below
From £119.89

Get 5% Off When You Spend £500!

Discount will be automatically applied to your cart when you spend £500 ex delivery & VAT.

Delivery Time: 4-6 Days
Product Information

 SheepWool Optimal is a highly effective, medium-density insulation, perfect for a wide range of internal applications. Offering superior thermal performance over most other natural & man-made insulators, this 100% pure wool material has a thermal conductivity rate of 0.0385 W/m2k and is available in a variety of practical dimensions to suit your requirements. It is super easy to install, incorporating a smoother inner side with added backing felt to ensure quicker fastening and enhanced support.

As with all SheepWool Insulation products, the Optimal Insulation is supported by an impressive range of unrivalled environmental credentials and is ideal for any homeowner looking to go greener. As it is a naturally occurring fibre, sheep's wool insulation is highly sustainable, renewable and biodegradable so, can be safely reused, recycled or even buried at the end of its lifespan. This carbon-neutral option also produces no environmental impact plus requires just a fraction of the energy used in the production of alternative insulating materials.

Reinforced with IONIC PROTECT® - unique to SheepWool Insulation, a small change in the molecular structure of the wool is made possible through an innovative plasma-ion treatment, leading to permanent protection against parasites such as moths and beetles, as well as degradation while in storage. Tested according to EAD and CUAP specifications, this treatment eliminates the need for potentially harmful biocides while ensuring a long-lasting, top-quality and fully-natural insulation solution.

  • Naturally mould-resistant - readily absorbs and releases moisture
  • Thermal Conductivity: 0.0385 W/m2k 
  • Numerous vertical & horizontal applications including internal ceiling, roof, walls, floor, sauna, acoustic ceiling, wood panel houses & log houses  
  • Smoother internal side with added backing felt for quick & easy installation 
  • 100% pure wool fibres with no added polyester - renewable & sustainable natural material
  • Perfect for green homes - zero global warming potential & carbon neutral for no environmental impact 
  • Reusable, recyclable & biodegradable at end of its lifespan 
  • Safe to touch & install with no special handling or professional protective equipment 

Have a Question?

If you have a question about this product, simply get in touch with our award-winning team through our live chat or by calling 0330 043 6726. We'll help you pick the ideal product for your project, whether you're revitalising an existing property or are tackling a larger new build.

More Information
SheepWool 100% Natural Optimal Insulation (18kg/m^3)
SKU WUL-0002
Delivery Time 4-6 Days
Manufacturer Sheepwool Insulation
Mould Resistant Yes
Thermal Conductivity 0.0385 W/m2k
Multipack Yes
Combustion Class Es1 D0/Bs1 d0
Density 18kg/m²
Water Permeable 1-2
Flash Point 570-600°C
Material Wool
Application Ceiling, Rafter, Wall, Floor
Room Attic, Loft
Brand Sheepwool Insulation

As we're unable to guarantee all data will be accurate, please refer to the manufacturers brochure if possible or contact us for more information.

Delivery

We aim to make the delivery of your products as hassle-free as possible through our network of trusted suppliers and couriers. Allowing you to get started with your project as soon as possible and with minimal fuss.

There are, however, a few common questions customers have about the delivery of their order. You can find answers to each of these below, but don’t hesitate to contact us if you have any other questions before placing your order.

How Much Will Delivery Cost?

Once you’ve added the products you’re buying to your basket, click the ‘Proceed to Checkout’ button found within the order summary. This will take you to the checkout, where you’ll be asked to enter your name, contact details and delivery address. Once this has been entered, simply click the ‘Continue to Shipping Method’ button where you’ll see a delivery cost.

How Long Will Delivery Take?

You’ll find an estimated delivery time on each product below the ‘Add to Basket’ button. In most cases, this is a range (i.e. 3 – 7 Days) that shows the earliest and latest a product will be delivered. But please remember these are estimates and factors out of our control could result in your delivery arriving sooner or later in rare cases.

Do You Deliver on Weekends?

All deliveries take place on weekdays (Mon – Fri) and do not take place on Bank Holidays. This ensures that Customer Care team are available in the unlikely scenario that you have an issue with your delivery.

When Will I Receive a Delivery Date?

Once your order has been placed, it will be processed by our team as soon as possible. As and when the courier confirms a planned delivery date, this will be sent to the email address provided when the order was placed. Be aware that this could be provided within a day or two but could take longer if the product ordered is on an extended delivery time.

Can I Track My Delivery?

We use several couriers to delivery to customers, meaning that not all provided live tracking. If tracking is available for your order, this will be provided at the same time as your planned delivery date.

Returns

We understand mistakes can be made and we therefore keep our cancellation and returns policy as simple as possible. However, there are a few things to know about cancelling an order or returning an item. These include:

Items Not Required

Should you no longer require an item, you have the right to cancel within 14 days of delivery unless the items are custom made. You needn’t give us reason for cancelling your order but will be required to notify us by email. Once notified we will provide an address for the items to be returned to and arrange the necessary refund.

Faulty or Damaged Items

On the rare occasion that an item is delivered faulty or damaged, we will exchange it or provide a refund. We must be notified by email as soon as possible and may require images. To avoid such an issue, we ask that customers do not sign for damaged goods.

Custom Made Items

A handful of items are ‘Custom Made’. This means they are typically manufactured to the specifications provided by you and are therefore non-refundable. This is unless they are deemed to be faulty or damaged at the time of delivery, at which point you should notify us by email as soon as possible.

Further Information

For further information on cancellations, returns and refunds please read our full policy by clicking here. This confirms any other requirements to consider (i.e. packaging), fees that may be charged (i.e. admin charges) and our policy for businesses. 

No questions found
Did you find what you were looking for?