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Xtratherm (Unilin) Thin-R PIR Insulation Boards
Xtratherm (Unilin) Thin-R PIR Insulation Boards
PIR Xtratherm

Xtratherm (Unilin) Thin-R PIR Insulation Boards

  • Pitched Roof Insulation
  • Xtratherm

  • Free Next Day Delivery (over £500) in the West Midlands
  • Free Standard Delivery (over £500)
  • View our guides for Help & Advice
 (   Ex. VAT) £15.00
 - £53.70
All prices are including VAT

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🚛 Next Day Delivery (West Midlands) – FREE on orders over £500

Xtratherm (Unilin) Thin-R Polyisocyanurate (PIR) Insulation Boards are a high-performance insulation solution designed to provide optimal thermal comfort and long-lasting energy efficiency.   

Crafted with advanced foam technology, this foil faced Polyisocyanurate (PIR) insulation boasts a low thermal conductivity of 0.022W/mK and low thermal drift. This Xtratherm insulation in 50mm, 100mm, and many other sizes effectively minimises heat transfer to reduce heat loss and ensure a warmer, more comfortable environment.  

With a CFC-free and environmentally friendly core, moisture resistance and vapour control, these boards also reduce the risk of thermal bridging, reducing condensation and mould growth for a healthier environment. 

Sizes: (thickness) 

  • 25 mm  
  • 50 mm  
  • 75 mm  
  • 100 mm  
  • 120 mm  
  • 150 mm 


  • Cavity wall insulation  
  • External wall insulation  
  • Internal walls insulation  
  • Loft insulation  
  • Ceiling insulation 
  • Floor insulation  
  • Suspended floor insulation  
  • Pitched roof insulation  
  • Flat roof insulation  


  • Low emissivity foil facings   
  • Versatile use   
  • Long-lasting energy efficiency   
  • Low thermal drift   
  • Moisture resistance with vapour control   
  • Thermal conductivity: 0.022 W/mK  
  • BBA certified   
  • A1 fire class rating   
  • Compressive strength > 140 (kPa)  


Storage: Xtratherm insulation boards should be stored on a clean, flat surface, off the ground and under cover.  

Installation: Xtratherm insulation can be easily cut with a sharp knife of fine-toothed saw. Make sure the boards are tightly fitted for optimal insulation performance.  

DISCLAIMER: Please make sure this product meets fire safety regulations for your project. 

Other PIR Insulation brands we stock include: 

About the Manufacturer 

One of the largest Irish manufacturers and suppliers of insulation products, Xtratherm specialises in the production of Polyiso (PIR), Phenolic, and EPS insulating materials. With advanced manufacturing facilities in Ireland and the UK, Xtratherm prides itself on crafting insulation materials that not only adhere to but surpass the industry’s most rigorous standards for thermal performance and sustainability. 

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Frequently Asked Questions

The key benefits of these Xtratherm Thin-R PIR Insulation Boards include optimal thermal performance, eco-friendly, versatile application, ease of installation, compliance with industry standards, top fire safety, and more.

The high thermal resistance of PIR foam in these Thin-R boards effectively reduces heat transfer, leading to improved energy efficiency in buildings. This can result in reduced heating and cooling costs, making them an environmentally conscious choice.

Yes, Xtratherm Thin-R PIR Insulation Boards are designed for ease of installation. Their lightweight nature makes handling and positioning straightforward, and they can be easily cut to fit specific requirements, which streamlines the installation process.

Free shipping will automatically be applied to all orders over £500. Simply add over £500 to your cart and you will see the discount while checking out.

Orders under £500 - £50 charge.
Over £500 is free.

We typically deliver orders within 2-3 business days of ordering.

Orders for the West Midlands will be completed in 1 to 2 working days.

Orders for areas out of the West Midlands will be completed in 3 to 4 working days.

Orders made after 5pm will be processed on the following working day.

Our deliveries are typically made between 8am and 5pm, Monday - Friday excluding Bank Holidays (Great Britain).

We are unable to offer timed deliveries.

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