100mm PIR Insulation Board

Celotex Variable thickness, pir insulation

100mm PIR Insulation Board

100mm PIR insulation board is a popular product bought for a building project.

But what are the options available to buy? There are a large number of brands that sell this product. To make life a little easier here is what we have to offer when looking for 100mm PIR insulation boards.

£37.49 Inc VAT £31.24 Ex VAT
Lowest Price- £30.62
£37.49 Inc VAT £31.24 Ex VAT
£34.99 Inc VAT £29.16 Ex VAT
£68.38 Inc VAT £56.98 Ex VAT
£22.13 Inc VAT £18.44 Ex VAT
£92.24 Inc VAT £76.87 Ex VAT
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What is 100mm PIR insulation board?

PIR boards are an upgrade more efficient board to PUR boards. PIR stands for polyisocyanurate and PUR is polyurethane. The PIR boards are one of the most commonly used and highly efficient insulation product used in building projects. As you can see from the products above they are 100mm PIR insulation boards and while they are from different manufacturers selling the same product they all look a little different. So why is this? This is because they are manufactured differently so to provide the perfect insulation to suit your needs. Listed below are the different types of PIR insulation boards-

So now that you know what boards are and the options available, where can you use these boards?

During your build project, there are a number of places you will need to have insulated. For this particular insulation, it can be applied to flat roofs, pitched roofs, floors, walls or used as cavity insulation. 

But which option do you select?

Foil-faced PIR boards

Theses boards PIR insulations are placed between two aluminium foil facings. They are available in a number of thicknesses. 


  • Eliminate thermal bridges
  • Easy to cut or shape
  • Energy Efficient
  • Unaffected by air infiltration
  • Resistant to the passage of water vapour
  • Can be used in new build or refurbishment.


  • Insulated sheathing on timber frame or steel frame
  • Insulation between studs on timber frame wall
  • External masonry with timber frame or ventilated cladding with timber frame
  • Pitched roofs
  • Flat roofs
  • Floors

PIR boards can be bonded to plywood


  • Very efficient and high performing
  • Thermoset insulation
  • Provides a vapour control layer


  • Timber deck flat roofs

PIR boards bonded to OSB boards


  • Low thermal conductivity
  • Works well in damp spaces


  • Decking
  • Flat roof applications
  • Thermal insulations
  • New builds
  • Refurbishments

PIR insulation boards can also be coated with mineral glass


  • Stable
  • Does not rot


  • Below single ply fully adhered roof membranes
  • Single-ply waterproofing systems
  • Partially bonded built-up felt.
  • Roof Decks

Need more information about the different insulation brands from the manufacturers themselves? Click on the logos below to find out more information

Celotex insulation online, insulation board, insulated plasterboard, XR4000, GA4000, TB4000, PL4000
kingspan insulation online
Ecotherm Insulation, online insulation, london, uk
Recticel insulation , online insulation, cheap insulation , insulation board

Please fact check with the manufacturer directly, as this post is not regularly updated and the information above may not be up to date.

If you cant find what you are looking for and need more help please feel free to contact us.