Product Filters

  • Manufacturer

  • Material type

  • Thermal conductivity

  • Width

  • Thickness

Clear all

Celotex GA4000 Insulation Boards

(7 Products)

When addressing heat loss, you first need to consider your home's thermal envelope and where it might be letting heat escape. Celotex GA4000 PIR multi-purpose insulation board offers excellent thermal performance with a thermal conductivity of just 0.022 W/mK. This BBA-certified thermal solution is fit for use in defined roof, wall and floor applications. 

The 2.4m x 1.2m GA4000 boards have zero ozone depletion potential (ODP) and low global warming potential (GWP). 

Find Out More About Our Types of Celotex GA4000
Filter Products

What Is Celotex GA4000? 

Celotex GA4000 is a versatile range of insulation boards designed to address a myriad of thermal insulation requirements across various building applications. 

Crafted from polyisocyanurate (PIR), these boards are recognised for their exceptional thermal performance and consistent efficiency. 

The GA4000 series is not just limited to one specific application; instead, it can be effectively utilised in walls, floors, and roofs, showcasing its adaptability in both new builds and renovation projects. 

With a low thermal conductivity, it ensures that warmth is retained within a structure during colder seasons and keeps interiors cooler during warmer periods. 

Furthermore, its robustness and ease of installation make it a favoured choice among construction professionals. 

Celotex GA4000 PIR Applications

GA4000 is a high-performance, versatile insulation solution can be used in general applications (as proven by the 'GA' name) such as roof, floor, wall and timber joists applications. 

Thanks to their low-emissivity foil facing on either side, the boards provide improved thermal performance in sealed cavity air spaces.

Celotex GA4000 can be specified for use in the following applications:

  • Pitched roofs
  • Solid masonry walls
  • Timber frames & steel framed systems
  • Timber frame internal linings
  • Floors - screed, concrete slab and timber joist floors
  • Loft insulation – between and over timber joists (pitched roof)
  • Timber frame sheathing (external wall)
  • Between timber frame studs (external wall)
  • Solid masonry internal linings (external wall)

Celotex GA4000 PIR Insulation Board Key Features

Celotex GA4000 has long been at the heart of the Celotex product range. A brief look at the specs below might give you some insight as to why:

  • Thermal conductivity of 0.022 W/mK
  • Moisture-resistant
  • Improves the achievable U-value of a project 
  • Purposed to eliminate thermal bridges
  • Low global warming impact - (GWP) and Zero Ozone Depleting Potential (ODP)
  • Achieves an A+ rating when compared to the BRE Green Guide 2008 - which can assist in demonstrating environmental performance in your BREEAM assessments.
  • Features low emissivity foil facings giving improved thermal insulation performance within cavity air spaces
  • Easy to cut and shape
  • Provides reliable long-term energy savings for buildings

Celotex Fire Classification

Celotex GA4000 PIR Insulation Board is 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 GA4000, 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.

Celotex Thicknesses

GA4000 is the most popular Celotex PIR general application insulation board in our range, it is 2400mm long and 1200mm wide.

You might see products labelled Celotex GA4100, Celotex GA4050, and Celotex GA4075, however, all these products have the same dimensions in terms of length and width. The only difference between these boards is that they each have different thicknesses.

Simply put, the different codes represent these different thicknesses. We stock a sliding scale of boards that suit every situation from thinner solutions starting at 20mm thick, all the way up to 150mm thick boards. And if that's not enough, you can always consider using two-layer build-ups.

Celotex GA4000 boards reduce the thickness of insulation required to hit the target U-Value. Celotex GA4000 comes in the following thicknesses - 50mm, 60mm, 70mm, 75mm, 80mm, 90mm, and 100mm.

For further details, please refer to the data sheets on our site. Each product in our range comes with a data sheet written by the manufacturer so you get all the information from the horse's mouth. Simply click on the 'Technical Downloads' tab, next to the 'Product Overview' tab.

Other Available Celotex Product Ranges

Frequently Asked Celotex GA4000 Questions

Are Celotex GA4000 Boards Sustainable? 

Yes, Celotex GA4000 Boards are designed with sustainability in mind. These 2.4m x 1.2m boards are manufactured using specific blowing agents that are conscientiously chosen for their low potential to contribute to global warming. 

This commitment to environmental responsibility is further underscored by the boards' zero ozone depletion potential (ODP) and low global warming potential (GWP). 

These characteristics not only align with the three-letter seals of environmental friendliness but also resonate with broader goals of sustainability and responsible building practices. 

Are Celotex GA4000 Boards Suitable For All Types of Buildings?

Celotex GA4000 Boards are adaptable and commonly used in various residential and commercial buildings. However, it is always advisable to consult with a construction professional to ensure the product meets the specific needs of your project.

What Is The Difference Between Celotex GA4000 and GA4100?

GA4000 boards are renowned for their versatility, making them a highly favoured choice among users. The 100mm version of GA4000, identifiable by the product code GA4100, stands out as the top-selling product in the Celotex lineup. 

What Is The Difference Between Celotex XR4000 and GA4000?

The Celotex XR4000 distinguishes itself by being the thickest insulation offering within the Celotex product range. This suits it to applications where maximum thermal insulation efficiency is required. 

GA4000, on the other hand, is suited for more general applications, such as in the wall, floor and roof. 

Related Articles

How To Install Celotex Insulation Boards

Celotex Floor Insulation Guide

Celotex vs Kingspan: What’s the Difference?

All Categories