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....
-
Trusted UK Supplier
Best selling Insulation
-
Most popularCelotex
Celotex PIR Insulation Board - 2400mm x 1200mm - (TB4000, GA4000, & XR4000)
From £14.70 GBPUnit price /Unavailable -
Most popularSaleRockwool
Rockwool RWA45 Slab - 1200mm x 600mm - All Thicknesses
From £22.10 GBP£22.38Unit price /Unavailable -
Most popularSale -
Most popularSale
-
Most popular -
Most popular
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 £41.10 GBPUnit price /Unavailable -
Shop Plasterboard
View all-
Most popular
Celotex
Celotex Insulated Plasterboard (PL4000) - 2400mm x 1200mm - All Thicknesses
From £38.00 GBPUnit price /Unavailable -
General Purpose
Moisture Resistant Plasterboard - 2400mm x 1200mm - All Thicknesses
From £19.66 GBPUnit price /Unavailable -
General Purpose
Fire Resistant Plasterboard - 2400mm x 1200mm - All Thicknesses
From £17.56 GBPUnit price /Unavailable -
General Purpose
Sound Acoustic Plasterboard - 1200mm x 2400mm - All Thicknesses
From £14.55 GBPUnit price /Unavailable -
General Purpose
Plasterboard Tapered Edge - All Thicknesses
From £10.85 GBPUnit price /Unavailable -
-
Soprema
Soprema Sopratherm PL4000 Insulated Plasterboard - 1200mm x 2400mm
From £38.00 GBPUnit price /Unavailable
National Insulation Supplies
Supplying insulation for all types of homes and businesses across the UK!
Buy Insulation Online with Fast UK Delivery
From DIY to Large-Scale Projects
Top Insulation Brands Delivered Nationwide
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
-
PIR Insulation
-
Loft Insulation
-
Acoustic Insulation
-
Cavity Wall Insulation
-
Roof Insulation
-
Insulated Plasterboard
Insulation Guides
View all-
-
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...
-
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.
-
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...
-
Best Selling Celotex Floor Insulation Boards in UK
Looking for the best Celotex floor insulation boards? This guide covers the most popular PIR insulation products used by UK trades, including GA4000 and TB4000, with expert advice on choosing...
-
Cavity Wall Insulation: Benefits, Costs & Best Products (UK Guide 2026)
Cavity wall insulation remains one of the most effective ways to reduce heat loss and lower energy bills in UK homes, but is it still worth the investment in 2026?...
-
Loft Insulation vs Spray Foam: Which Is Best for UK Homes? (2026 Guide)
Trying to decide between loft insulation and spray foam? This guide compares costs, performance, and pros and cons for UK homes, helping you choose the most effective and cost-efficient option...
-
What Is Loft Insulation & How Does It Work? UK Guide (2026)
Learn what loft insulation is, how it works, types available in the UK, and how it reduces heat loss. A complete beginner-friendly guide with FAQs.
