PIR Insulation

(36 products)

PIR Insulation Boards

PIR (Polyisocyanurate) insulation is one of the highest-performing rigid insulation materials available, widely used across the construction industry for roofs, walls, and floors. Its exceptional thermal resistance means you can achieve low U-values with thinner boards — ideal for projects where build-up depth is limited.

What is PIR Insulation?

PIR boards are manufactured from a closed-cell rigid foam, typically faced on both sides with a reflective foil or glass tissue facing. This construction gives PIR boards excellent thermal performance, low moisture absorption, and good compressive strength. They are lightweight, easy to cut on-site, and compatible with most standard construction methods.

Applications for PIR Insulation Boards

PIR insulation is suitable for a wide range of applications, including:

  • Flat roofs — warm roof and cold roof build-ups
  • Pitched roofs — between and below rafter systems
  • Solid and cavity walls — internal and external insulation
  • Floors — below screed and above joist installations

Leading PIR Insulation Brands

We stock PIR insulation from the UK's most trusted manufacturers, including Celotex, Kingspan, and Recticel. All products are available in a range of thicknesses to suit your specification, with next-day delivery available across mainland UK.

The Benefits of PIR Insulation Boards

There are many benefits of using PIR insulation boards. These include: Lightweight and easy to install PIR insulation boards need only half the thickness of traditional insulation to achieve the same level of thermal efficiency They will not rot, sag, or perish over time and will continue to provide intended insulation values for the duration of its existence. Fire resistant; complies with building code regulations without requiring additional measures or treatments The insulation core and facings defend against mould and bacterial growth Energy efficient; cost effective thermal resistance means more savings on heating bills year round; it will actually save 80 times more energy than it took to make over its lifetime PIR insulation is a cost-effective building material that will pay for itself over time

Frequently Asked Question
The recommended thickness for PIR insulation in walls is between 100mm and 140mm, depending on the specific application and desired level of thermal performance. The general guidelines for PIR insulation thickness are: 100mm for the recommended U-value of 0.25 W/m2K. 125mm for the recommended U-value of 0.17 W/m2K. 140mm for the recommended U-value of 0.16 W/m2K.
PIR insulation generally doesn’t degrade over time, so it is designed to last for the lifetime of the building. It also doesn’t sag or move once installed, so it is a long-lasting effective type of insulation.
Yes! Due to its longevity and fire-resistant properties, PIR insulation is one of the most popular and ideal types of insulation used in lofts.
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What customers say about us

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Exceptional service, great product choice

Nov 15, 2023

Exceptional service. I needed insulation, this company had the brand I wanted, were able to deal with a query I had via chat and even though it was quite late in the...

A C-Ward

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I ordered SuperFoil insulation on 15th…

Nov 16, 2023

I ordered SuperFoil insulation on 15th… I ordered SuperFoil insulation on 15th November and it was delivered on 16th November. The prices are...

James

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Construction Megastore were really...

Nov 15, 2023

Construction Megastore were really helpful and friendly when I was ordering some SuperQuilt and they offer very competitive prices. Highly recommend them!

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