PIR vs Mineral Wool Insulation: Which Is Best for Your UK Project?
PIR and mineral wool are two of the most popular insulation materials used in the UK, but they perform very differently. PIR boards are often chosen for high thermal performance...
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Best selling Insulation
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Most popularCelotex
Celotex PIR Insulation Board - 2400mm x 1200mm - (TB4000, GA4000, & XR4000)
From £15.30 GBPUnit price /Unavailable -
Most popularRockwool
Rockwool RWA45 Slab - 1200mm x 600mm - All Thicknesses
From £23.20 GBPUnit price /Unavailable -
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Kingspan
Kingspan Kooltherm K106 Cavity Board - 1200mm x 450mm - All Thicknesses
From £90.50 GBPUnit price /Unavailable -
Most popularKnauf
Knauf Acoustic Partition Roll (APR) - 600mm Width - All Thicknesses
From £44.60 GBPUnit price /Unavailable -
Shop Plasterboard
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Celotex
Celotex Insulated Plasterboard (PL4000) - 2400mm x 1200mm - All Thicknesses
From £41.80 GBPUnit price /Unavailable -
General Purpose
Moisture Resistant Plasterboard - 2400mm x 1200mm - All Thicknesses
From £20.90 GBPUnit price /Unavailable -
General Purpose
Fire Resistant Plasterboard - 2400mm x 1200mm - All Thicknesses
From £18.70 GBPUnit price /Unavailable -
General Purpose
Sound Acoustic Plasterboard - 1200mm x 2400mm - All Thicknesses
From £15.50 GBPUnit price /Unavailable -
General Purpose
Plasterboard Tapered Edge - All Thicknesses
From £11.60 GBPUnit price /Unavailable -
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Soprema
Soprema Sopratherm PL4000 Insulated Plasterboard - 1200mm x 2400mm
From £44.60 GBPUnit price /Unavailable
National Insulation Supplies
Supplying insulation for all types of homes and businesses across the UK!
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National Insulation Supplies offer an extensive selection of insulation products from leading manufacturers like Celotex, Kingspan, Knauf, Rockwool, and Recticel and much more.
Explore our diverse range of products tailored for various applications, including floor insulation, wall insulation, roof insulation and cavity wall insulation.
Our loft insulation options include a variety of premium products, such as loft roll designed to enhance energy efficiency in your building and even loft boards.
We also provide specialised products such as fire protection insulation, acoustic insulation, and eco-friendly solutions. Whether you need insulated plasterboard, building membranes, or fire-stopping insulation.
Popular Insulation by Category
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PIR Insulation
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Loft Insulation
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Acoustic Insulation
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Cavity Wall Insulation
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Roof Insulation
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Insulation Guides
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Soffit Insulation Cost UK (2026 Guide) | Prices & Savings
Thinking about insulating your roof edges? This guide explains soffit insulation costs in the UK, average installation prices, insulation materials, energy-saving benefits, and the factors that affect costs. Learn how...
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Best Roof Insulation Boards in the UK (PIR vs Mineral Wool) | Complete 2026 Buyer's Guide
Choosing the right roof insulation can significantly reduce energy bills and improve comfort in UK homes. This guide compares PIR insulation boards and mineral wool insulation, covering thermal performance, fire...
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How to Insulate a Shed | Shed Insulation Guide UK
Learn how to insulate a shed properly with this practical UK guide. Discover the best insulation materials for shed walls, floors and roofs, including PIR boards, mineral wool and foil...
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Do You Need a Vapour Control Layer? UK Building Guide
A vapour control layer helps reduce the risk of hidden condensation inside walls, roofs and floors by controlling moisture movement from the warm side of a building into colder areas....
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How to Choose the Right Fire Resistant Sealant for Your Project | Silicone vs Acrylic Guide
Learn how to choose the best fire resistant sealant for your project. Compare silicone vs acrylic firestop sealants, key applications, fire ratings, and top Nullifire products available from National Insulation...
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Isover Achieves Full EPD Coverage Across UK-Manufactured Insulation Range
Isover has announced Environmental Product Declarations (EPDs) across its full range of UK-manufactured insulation products, helping contractors, architects and specifiers make more sustainable and informed building decisions.
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Breather Membrane vs Vapour Barrier: What’s the Difference?
Breather membranes and vapour barriers both help manage moisture in buildings, but they do very different jobs. A breather membrane allows water vapour to escape while helping protect the structure...
