Celotex GA4000 Insulation Board

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Celotex GA4000

Celotex GA4000 makes up a part of the Celotex PIR Board range. This range is made up of TB4000, GA4000 and the XR4000. GA4000 itself is the mid-thickness range of the three variations. The boards that make up the GA4000 variations are available in multiple thicknesses. These thicknesses consist of 50mm, 60mm, 70mm, 75mm, 80mm, 90mm and 100mm. The dimensions of the board are 2400 x 1200 mm in length and width. All of the Celotex PIR boards are available in the same length and width dimensions.

PIR Insulation Board

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Celotex General Purpose Insulation Board – GA4000

The Celotex GA4000 insulation boards can be installed in multiple applications. They are easy to cut and install. These boards even boast excellent thermal performance. The GA4000 board has a thermal conductivity of 0.022 W/m.K. The GA4000 achieves an A rating when compared to the BRE Green Guide. It also has certification from BBA. Celotex is an innovative company, who are constantly improving its products. The GA4000 has been specifically designed to conform with the building standards of the future.

When using Celotex GA4000, it is important to ensure that the use of this board in your application meets all national building regulations, in addition to national and local standards. This includes requirements in relation to fire and height restrictions.

Every Celotex GA4000 product page features a datasheet as well as full technical specifications. The R-Value of each product differs on the thickness of the board. Celotex GA4000 has a Euroclass E Reaction to Fire classification, according to BS EN 13501-1.

What are Celotex GA4000 boards made from?

Celotex GA4000 insulation boards are made from rigid polyisocyanurate. This is known as PIR in the industry. PIR is thermoset plastic, which is formed into a foam. A layer of aluminum foil is also glued onto the board. This low emissivity foil facing helps to improve the insulation properties of the GA4000. The finished product is then sliced into boards of various thicknesses.

GA4000 is popular as it can be cut and installed easily. For guidance on installing GA4000 insulation board – read our Celotex PIR Board Installation Guide.

The GA4000 is the most popular range of Celotex PIR boards. The Celotex GA4000 board has a thermal conductivity of 0.022 W/m.K, which can help to reduce the thickness of insulation needed to hit the target U-value.

Celotex GA4000 Applications

The GA4000 can be applied to a variety of applications. It is worth noting that Celotex GA4000 should not be used on external walls of buildings that are 18 metres or taller in height in England & Wales or 11 metres or taller in Scotland. This is due to recent changes in building regulations that have meant that only non-combustible or very limited combustible materials can be used in a building that tall. It can be considered for floor, wall and roof applications. A list of applications for the GA4000 can be found below:

  • Ground Floor – Concrete Slab
  • Ground Floor – Suspended Timber Joist
  • Ground Floor – Beam and Block
  • Ground Floor – Upgrading Existing Concrete Slab
  • External Wall – Timber Frame Internal Linings
  • External Wall – Timber Frame Sheathing
  • External Wall – Between Timber Frame Studs
  • External Wall – Solid Masonry Internal Linings
  • Pitched Roof – Over Timber Rafters
  • Pitched Roof – Sarking
  • Pitched Roof – Below Timber Rafters
  • Pitched Roof – Between Timber Rafters
  • Pitched Roof – Loft insulation – Between and Over Timber Joists
  • Flat Roof – Balconies & Terraces Over Joists
  • Flat Roof – Between Timber Joists
  • Flat Roof – Below Timber Joists

At Insulation Board, we offer our best possible price on Celotex GA4000. In addition to this, we have also introduced tiered pricing on our special deals. This means that you save money with us when you buy in bulk. The more you buy, the more you save! We have made our online experience as user friendly as possible to ensure a flawless experience.

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How do you cut and install GA4000 boards?

GA4000 Insulation PIR boards can be cut by first measuring and marking the boards to size and cutting with a fine-toothed saw. They can also be cut by scoring one side of the board with a sharp blade, snapping the board over a hard edge, and scoring the other side of the board.
Protective gear such as gloves, masks, and goggles should be worn when cutting PIR boards to prevent irritation caused by the material fibres.
Please note this is a guide only. Always consult a building professional before insulating your domestic or non-domestic building. Installing the incorrect insulation materials or using an incorrect installation method can be a timely and costly mistake.
Partition stud wall Applications – Cut the boards to size if necessary. Measure the spaces between each stud to ensure each board fits each individual space as the cavity sizes may differ. Apply plasterboard horizontally to one side of the partition wall using the required fixings. Push the insulation boards to the back of each cavity. Ensure two boards joint together are tightly butted and foil tape is used to avoid thermal bridging. One the stud wall has been filled with insulation, apply plasterboard horizontally to the other side with the necessary fixings. Corner beads and Mesh tape can also be applied to the plasterboard to avoid damage when decorating.

Is Celotex GA4000 insulation board waterproof?

Although not waterproof, Celotex is moisture resistant. This means it does not absorb water as it has a closed cell structure. GA4000 will prevent condensation, mold, and rot.

Can GA4000 be used to insulate high rise flats?

No. Celotex GA4000 should not be used in the external walls of buildings over 18 metres in height (England and Wales) or 11 metres in height (Scotland). Recent changes to Building Regulations mean that only non-combustible insulation or insulation of limited combustibility can be used in buildings of that height.