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PIR Insulation Board
About Our PIR Insulation Board
A PIR insulation board is a staple material on modern building sites where thermal performance, consistency and controlled build-ups are essential. Designed to deliver strong insulation values without excessive thickness, PIR boards are widely specified for floors, walls and roofs across both domestic and commercial projects. At The Builders Supply Company, we stock a broad selection of foil-faced PIR boards in standard sheet sizes and a full range of thicknesses, making it easier to match insulation levels to the job in hand.
With fast delivery available and the option to collect from a nearby branch, you can keep work moving without unnecessary hold ups. Get in touch with us today to check availability and get materials on site when you need them.
PIR Thermal Insulation Boards For Practical Builds
An insulation PIR board uses a rigid polyisocyanurate core with foil facings to achieve low thermal conductivity across a relatively slim profile. This makes PIR particularly effective where space is limited but compliance with current Building Regulations remains required. The foil faces also help with vapour control when detailed correctly, supporting clean, predictable installation in both new build and refurbishment settings.
Contractors often favour PIR boards for their straight edges, ease of cutting and compatibility with standard fixings and adhesives. Whether used behind plasterboard linings, within warm roof constructions or beneath screeded floors, PIR thermal insulation boards provide consistent performance and repeatable results on site.
PIR Insulation Board Thickness Options
Selecting the correct thickness is key to achieving the required U-value without over engineering the build up. A 25mm PIR insulation board is commonly used for service voids, partial upgrades or layered systems where insulation needs to be added without disrupting surrounding details. Thicker boards allow higher thermal performance in a single layer, reducing installation time and complexity.
A PIR insulation board 100mm is frequently specified in roof and floor applications where heat loss control is critical. Mid-range options offer flexibility for wall linings and ceilings, allowing specifiers to fine-tune performance while keeping overall construction depths manageable.
Shop PIR Insulation Boards at The Builders Supply
View the full range of PIR insulation board options, available in multiple thicknesses to suit a wide variety of applications. You can also explore insulation products to support complete floor, wall and roof assemblies. We offer dependable delivery, branch collection and trade account support, and our team is always available to advise on product selection or installation considerations.