Celotex Insulation Board

Lower energy bills and increase comfort with Celotex Insulation Boards. Made from premium-grade PIR, these multi-purpose boards are a BBA certified thermal solution fit for use in numerous applications in both new and refurbished builds. Thanks to their low emissivity foil facings, Celotex PIR boards offer an impressive thermal conductivity of just 0.022 W/mK.

The boards have zero ozone depletion potential (ODP) and low global warming potential (GWP). 

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What Is Celotex Insulation?

Celotex is a market leader when it comes to high-performance insulation solutions. Part of the European Saint Gobain group, Celotex is known for creating reliable products with strong thermal insulation performance designed to keep your home toasty. Celotex focuses on not only developing products that are well insulating but also focus on meeting current and future building regulations, as well as other carbon reduction programmes. Celotex PIR boards are designed to be one of the thinnest insulation boards on the market, whilst still achieving premium levels of energy efficiency and U values.

Celotex multi-purpose insulation board features a tough polyisocyanurate (PIR) core; a tacky foam which is sandwiched between two aluminium foil facings. Celotex boards use a blowing agent that has zero ozone depletion potential (zero ODP) and low global warming impact, meaning they're as ecologically gentle as they are thermally efficient.

General Purpose Celotex Insulation Boards

As the 'GA' in these boards' code would suggest, General Purpose Celotex boards are ideal for general applications. Everyone from residential homeowners to commercial project managers can benefit from these boards. They come in a range of sizes and are suitable for pitched roofs, ceilings, floors, and masonry walls.

If you are looking for an insulated plasterboard solution from Celotex, you can explore the Celotex PL range. This is a tapered edge plasterboard bonded to a Celotex insulation board, representing a 2-in-1 drylining and insulation solution that can be used to reduce installation time for internal wall and loft applications.

Celotex CW4000 Cavity Wall Insulation Boards

Homeowners lose over a third of the heat in their homes through the walls. Celotex produces a range of cavity insulation boards that are suitable for installation in external walls; helping you to reduce bills and increase comfort. Celotex’s cavity wall insulation is denoted by the code Celotex CW4000.

Partial fill cavity insulation slots in between the inner blockwork and outer brickwork of a property. It fills the cavity air spaces, captures heat, and reflects it into the home; meeting current building regulations and carbon reduction programmes.

We the stock 50mm, 75mm, and 100mm Celotex cavity wall insulation board.

Celotex Thicknesses

Follow our handy Celotex thickness guide to find a PIR insulation board that suits your project.

●     Celotex TB4000 - 20mm, 25mm, 30mm, and 40mm thickness

●     Celotex GA4000 - 50mm, 60mm,70mm, 75mm, 80mm, 90mm, and 100mm thickness

●     Celotex XR4000 - 110mm, 120mm, 130mm, 140mm, and 150mm thickness

Frequently Asked Celotex Insulation Board Questions

What Are the Benefits of Celotex Insulation Boards?

Complete with over 90 years of experience in the insulation industry, Celotex is the go-to choice for people who want to minimise heat loss and maximise energy use. Like other typical PIR products, Celotex delivers maximum efficiency for overcoming thermal bridging. Celotex PIR has long been at the heart of the insulation industry. A brief look at the specs below might give you some insight as to why:


Celotex Fire Classification

Celotex PIR Insulation Board are tested to BS EN 13501-1 with a classification of E. Simply put, this means it is combustible and will contribute to the overall fire load. Because of this, the boards must not be used in the external facades of buildings over 18m in height in England and Wales or over 11m in height in Scotland.

When using Celotex Insulation, please ensure your installation meets all relevant national Building Regulations and guidance and local, national and other applicable standards relevant to your construction or application.

Is Celotex Waterproof?

PIR is a cracking choice for homeowners who want to protect their homes from the elements and prevent air movement and heat loss in vulnerable exposure zones. Celotex PIR is a closed-cell, moisture-resistant insulation board, meaning it does not hold water. 

However, this does not mean that this insulation board is suitable for external use. They should only be installed inside the building structure. A wet and soggy board will not only hinder the installation process but will impair its thermal performance.

How to Install Celotex Boards?

There are lots of different ways you can install Celotex products. Our customers install Celotex insulation for enhanced thermal performance in floor systems, underfloor systems, flat roof systems, cavity walls, and between rafters in pitched roofs. As a multi-purpose, general application insulation board, Celotex can be installed in new and existing buildings for a variety of projects and situations.

At Materials Market, we arm our customers with all the information they need. When you choose our products, you can do the job right the first time. Each Celotex insulation board in our range is accompanied by technical information to assist the installation process. You can also download an insulation board data sheet for each product, which you can find listed under ‘Technical Downloads’ on the product pages.

How to Cut Celotex Boards?

You should only undertake this task if you have industry-standard equipment. Most of our customers cut a PIR insulation board with a hand saw. We recommend cutting the insulation boards in a dedicated construction space that has more than enough room for movement. 

Always wear protective clothing when you are cutting Celotex insulation boards. Protective clothing includes safety glasses, gloves, and even aprons.