Unilin (Formally Xtratherm) PIR Insulation Board | 2400mm x 1200mm (All Sizes)

Unilin fka XtrathermSKU: IUK01090

Sale price£15.60 

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Unilin Thin-R PIR Insulation Board, formally known as Xtratherm


Unilin Thin-R, formerly known as Xtratherm, is a high-performance, foil-faced Polyisocyanurate (PIR) insulation board.

With its low thermal conductivity and high compressive strength, this foil-faced PIR insulation board is engineered for outstanding performance in roofs, walls, and floors.

Achieve superior thermal continuity and bridging with Unilin Thin-R PIR Insulation Board, the choice for professionals aiming for excellence in building efficiency.


Key Features

  • Low Emissivity Foil Facings: Reduces heat transfer, enhancing the thermal envelope of buildings.
  • Versatile Application: Ideal for use across a variety of structural placements, including floors, walls, and roofs.
  • Eco-Friendly Rating: Achieves an A+ rating under the BRE Green Guide, supporting environmentally conscious construction practices.
  • Robust Compressive Strength: With a strength greater than 140 kPa, it withstands rigorous conditions, ensuring durability and longevity.

Product Specifications

Specification Details
Dimensions 1200 x 2400 mm
Area Per Board 2.88 m²
Thermal Conductivity 0.022 W/mK
Certification BBA certified
Facing Aluminium foil
Core Fibre-free rigid polyisocyanurate (PIR)
Compressive Strength 140 kPa (at 10% compression)
Available Thicknesses 20 - 150 mm


Installation and Handling

Unilin Thin-R PIR Insulation boards (formally Xtratherm) are designed for ease of installation. They can be precisely cut with a sharp knife or a fine-toothed saw, ensuring a tight fit that maintains continuous insulation as specified in accredited details. For optimal performance and longevity, store Thin-R boards off the ground on a clean, flat surface, and always under cover as the polythene wrapping does not offer sufficient protection for outdoor exposure.


Frequently Asked Questions (FAQ's)

Has Xtratherm changed its name to Unilin? Yes, Xtratherm was rebranded as Unilin Insulation in early 2023. Although Xtratherm joined the Unilin Group in 2016, it continued operating under the Xtratherm name until recently. This transition to Unilin Insulation represents a consolidation under a single brand, enhancing Xtratherm’s offerings across the UK and Ireland within a major European construction industry framework.

Is the product formerly known as Xtratherm Thin-R PIR Insulation now called Unilin Thin-R? Absolutely, Xtratherm Thin-R remains the same superior PIR insulation product, only the name has been updated to Unilin Thin-R. The change reflects our brand's evolution while continuing to deliver the same high-quality insulation solutions.

Is there any difference between Xtratherm Thin-R and Unilin Thin-R? No, there is no difference in the product itself. Unilin Thin-R is simply the new name for the product previously known as Xtratherm Thin-R.

What makes Unilin Thin-R insulation a preferred choice in the market? Unilin Thin-R insulation, originally known as Xtratherm, is favoured for its exceptional thermal performance and robustness. With a thermal conductivity as low as 0.022 W/mK, it provides effective insulation in a compact profile, suitable for floors, walls, and roofs in diverse construction projects.

What is PIR insulation? PIR (polyisocyanurate) insulation is a type of thermal insulation material used in building and construction. It is known for its excellent thermal performance and high resistance to heat flow, making it an effective solution for reducing energy costs in homes and buildings.

Why is PIR Insulation so expensive? The cost of PIR insulation reflects its superior thermal performance and energy efficiency. The materials and technology used to manufacture PIR insulation are advanced, contributing to its higher price point compared to other insulation types.

Can PIR Insulation get wet? PIR insulation is generally moisture-resistant but not entirely waterproof. While it can withstand some exposure to moisture without losing its insulative properties, prolonged or excessive wetness can affect its performance. It's important to protect PIR insulation from water during installation and use.

Can PIR Insulation be recycled? Recycling PIR insulation can be challenging due to its chemical properties and the presence of fire retardants. However, efforts are being made to improve the recyclability of PIR products as part of the industry's commitment to sustainability.

How much PIR Insulation do I need? The amount of PIR insulation required depends on the specific energy efficiency goals, climate, and the area being insulated. It's best to consult with a professional to calculate the optimal thickness and quantity based on your particular needs.

How is PIR insulation made? PIR insulation is manufactured through a chemical reaction between a polyol and an isocyanate, forming a rigid foam board. This process involves the use of catalysts and blowing agents, which expand the material into a highly insulative foam with a closed-cell structure.

How does PIR Insulation work? PIR insulation works by trapping air within its closed-cell foam structure, significantly reducing heat transfer. This air barrier effectively minimizes the amount of heat that can pass through, helping to maintain a consistent indoor temperature and reduce energy consumption.

What is PIR Insulation made of? PIR insulation is made from polyisocyanurate, a type of plastic known for its excellent fire resistance and thermal properties. It typically features a foil facing to enhance its thermal resistance and moisture barrier.

Where to buy PIR insulation? PIR insulation is available at InsulationUK! We stock a wide range of PIR insulation products from leading brands such as CelotexRecticel, Ecotherm, and Kingspan.

How to cut PIR Insulation? PIR insulation can be cut using a sharp knife or a fine-toothed saw to fit specific measurements.

For precision cuts and to minimize onsite waste and mess, InsulationUK offers a bespoke cutting service. Customers can order PIR boards pre-cut to their exact specifications, ensuring a perfect fit and easier installation.



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Important Notice: Please be aware that during periods of high demand, we reserve the right to provide alternative brands that meet the same specifications and quality standards as the products you originally ordered.


Order Value Delivery Charge
Up to £200.00 ex-vat £100.00 ex-vat
£200.00 - £599.95 ex-vat £59.95 ex-vat
Above £599.95 ex-vat Free Delivery


Weekend Delivery
Available upon request


Parcel Rates
Delivery charge may vary depending on quantity and volume of your order.
Pricing will be calculated during checkout.


Local Delivery Charge
Within 35 miles of Postcode S63 9BL - Up to £500.00 ex-vat
Delivery Charge £35.00 ex-vat
Please contact us to arrange collections
Tel: 0300 303 4578 | Email: sales@insulationuk.co.uk


Delivery charges will automatically be calculated within the checkout process.
Orders are only processed for delivery between 8.00am - 5.00pm Monday to Friday excluding bank holidays.
Moffett offload will be used for large bulky deliveries and only when agreed with you.
Please advise of any access issues on ordering.
Delivery is Kerbside only.
In the unlikely event that your delivery is not correct or damaged please notify us immediately and mark any issues on the delivery slip.


    Where We Deliver

    Delivery Areas

    We have a fleet of FORS delivery vehicles all with Moffett mechanical off loads that deliver nationwide. Sometimes we may use 3rd party carriers for smaller orders.


      Product Delivery Times

      The vast majority of our orders are dispatched within 3 working days, this can however be up to 5 working days, please contact us if you require something urgent.
      Speciality items may take up to 5-7 working days.
      We will contact you with in 24/48hrs of your order been placed to confirm delivery times and dates.

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        Customer Reviews

        Based on 77 reviews

        Great transaction, bought the stuff, the stuff showed up!

        Seamus Duignan
        Great service

        Great service and very helpful driver.

        Xtratherm PIR Insulation Board | 2400mm x 1200mm (All Sizes)

        Good value and good service

        Mrs Cummins
        Xtratherm PIR Insulation Board | 2400mm x 1200mm (All Sizes)

        Premium product supplied, fast and convenient delivery. Will use InsulationUK again.

        Xtratherm PIR Insulation Board | 2400mm x 1200mm (All Sizes)

        Not fitted yet but seems good quality and arrived in great condition, no bumps or chunks out of it.
        Got to say the delivery driver was a star, could not have been more helpful or amenable with getting the delivery to us down a difficult and tricky track way.