Celotex GA4000 thermal PIR insulation board (2023)


  • Light panel 2400 x 1200 mm
  • Low-E films
  • It has received a BRE Green Guide A rating
  • BBA approval - Certificates 16/5352 (wood-frame dwellings), 17/5405 (pitched roofs, dry lining, floor insulation)

Fire resistance level

Euroclass F fire resistance to BS EN 13501-1. Products with this classification level do not give a smoke emission rating.

(Video) Celotex PL4000 Insulation Board

Product specification

Thickness (mm) Length (mm) Width (mm) Lambda 值 (W/m.K) R value (m².K/W)
50 2400 1200 0,022 2.25
60 2400 1200 0,022 2.70
70 2400 1200 0,022 3.15
75 2400 1200 0,022 3.40
80 2400 1200 0,022 3.60
Post-90-e 2400 1200 0,022 4.05
100 2400 1200 0,022 4.50

Advantages of the product

  • Thermal performance - Excellent thermal performance with a thermal conductivity of 0.022 W/m.K, reducing the insulation thickness required to achieve target U-values.
  • High performance finishes - Low emissivity foil finishes improve the thermal performance of closed cavity air spaces, increasing achievable U-values.
  • SIMPLE INSTALLATION - Celotex panels are light and strong, which makes them easy to transport, handle and install.
  • BBA Approved - Celotex GA4000 has been assessed by the BBA as suitable for certain roof, wall and floor applications when installed, used and maintained in accordance with the certificate. Please read the confirmationInsulation - UK.com/BBALearn more about all the details and restrictions.
  • Sustainability - Celotex GA4000 has a BRE Green Guide A rating which helps demonstrate environmental performance in your BREEAM assessment. Visit the Celotex site atwww.greenbooklive.comFind out more.

key considerations

When using Celotex GA4000, you should ensure that the product is used in accordance with all relevant national building regulations and guidelines, as well as local, national and other applicable standards relevant to your building or application, including fire protection requirements and applicable restrictions Heights.
Please see the following product documentation:

(Video) 100mm Celotex GA4000 PIR Insulation Board 2400 x 1200 x 100mm GA4100 - Smart Build Supplies Direct

Celotex GA4000 must not be used on building facades higher than 11 meters. Recent changes to building regulations mean that only non-flammable or limited-flammability insulation can be used in buildings of this height.

(Video) Celotex GA4000 Insulation Board


What is the difference between Celotex XR4000 and GA4000? ›

What is the difference between Celotex TB4000, GA4000 and XR4000? There is no difference, they are the same boards, just different thickness groups.

What is Celotex GA4000? ›

Celotex GA4000 is an easy to install polyisocyanurate (PIR) insulation board with excellent thermal performance, featuring a low emissivity foil facing. Available in thicknesses from 50mm to 100mm, it can be considered for roof, wall and floor applications.

Why is there a shortage of PIR insulation? ›

What to do when you can't buy PIR insulation boards. From time to time certain building materials can fall into short supply. This can be for a number of reasons, such as the housing market is booming and factories just have not got the extra capacity to cope with the increase in production.

Is PIR the same as Celotex? ›

"Celotex XR4000 is an easy-to-install polyisocyanurate (PIR) insulation board with excellent thermal performance, low emissivity foil facings, and a low global warming impact, suitable for roof, wall, and floor applications." In other words, they are all the same item.

Is Celotex better than Rockwool? ›

Both Rockwool products and Celotex provide good thermal insulation, however if it is solely thermal which is required then Celotex may be the better option, as it has a better thermal performance. However Rockwool products have much better sound-absorbing and fire-resistant properties.

Why is Celotex so expensive? ›

Celotex is a fairly top-end product in terms of price, but the varying thicknesses and sizes make it difficult to confirm a specific amount. The higher cost is largely due to the foam and difficulty in manufacturing this type of board. Of course, you will need a reliable supplier.

Does Celotex need an air gap? ›

It's essential to create a space between your Celotex boards and the roof itself, to allow air to circulate. This will then help prevent damp and condensation, and in turn, mould. A sensible air gap, we would recommend, is somewhere around 25mm-50mm.

Do I need a Vapour barrier with Celotex? ›

Celotex does need a vapour barrier, as a vapour barrier will help to prevent moisture and air from seeping through the wallboard and into the insulation.

How long does Celotex last? ›

How Long Does Celotex Last? Celotex, if left undisturbed once installed can be expected to last around 60 years.

Why is PIR insulation so expensive? ›

At the time of writing in mid-2021, PIR insulation has seen a number of price increases linked to the supply of raw materials required to manufacture it. In addition, issues with the transportation of those raw materials have affected the availability of PIR in the UK market.

What is better than PIR insulation? ›

While PIR and PUR have been used for decades, there's another advanced insulation that outshines both in fire protection and thermal performance: Kingspan's QuadCore Technology. With 11 percent better thermal performance than PIR and up to 60 percent improvement over PUR, it is unrivaled in the market.

What is the lifespan of PIR insulation? ›

How long does PIR Insulation (Eurothane GP) last? It doesn't degrade over time so continues to give you the same outstanding insulating performance to last the lifetime of the building. Also because it is a ridged board it will not sag or move once installed, as this can cause insulation voids in the building envelope.

Which PIR board is best? ›

Some of the best PIR thermal insulation board solutions currently on the market come from the likes of Celotex, Recticel, EcoTherm, IKO, Xtratherm and Kingspan. Let's take a closer look at their respective performances. Keep in mind that the higher the R-value of insulation the better its thermal performance.

Do they still make Celotex? ›

The subsidiary was formed to manufacture Celotex fiberboard insulation at a facility in Marrero, Louisiana. Celotex Company of Great Britain was founded in 1925, and only this arm of the company still exists today as a brand of Saint-Gobain.

Is Celotex the best insulation? ›

Celotex boards are a top choice for insulation because they offer a superior combination of thermal, acoustic and fire performance. Celotex products have been successfully tested in accordance with UK building regulations.

What is an alternative to Celotex? ›

If you are looking for a thermal insulation that is significantly cheaper than Celotex, you could use EPS Polystyrene. Quinn Therm has an extensive range of PIR insulation products with top-performing thermal conductive properties for use in floors, roofs and walls.

What is the strongest insulation board? ›

Polyisocyanurate: Known as polyiso for short, polyisocyanurate foam has the highest R-value per inch (R-6.5 to R-6.8) of any rigid insulation.

What is the best insulation material available? ›

Aerogel is more expensive, but definitely the best type of insulation. Fiberglass is cheap, but requires careful handling. Mineral wool is effective, but not fire resistant. Cellulose is fire resistant, eco-friendly, and effective, but hard to apply.

When did Celotex go out of business? ›

Celotex manufactured asbestos insulation and construction materials from the 1920s to the 1980s, and it operated an asbestos mine until 1986. Asbestos litigation forced the company into bankruptcy in 1990.

What happens if Celotex gets wet? ›

Can I still use it? Yes, the insulation is open cell meaning that it will allow air movement through it. The product will therefore dry out and can be used as long as it has not been damaged.

Is Celotex harmful to breathe in? ›

Celotex products are considered to be non-hazardous and have no known toxic effects. However, inhaling dust should be avoided. Celotex products should always be handled and used in accordance with good occupational hygiene and safety practices.

Can I stick Celotex to a wall? ›

Insulation boards by Celotex can be installed in pitched roofs, flat roofs, solid masonry walls and more.

Can you screw into Celotex? ›

Correct installation of the Celotex board

The Celotex board must be installed as tightly as possible between the joists and secured with screws or nails.

Can you walk on Celotex insulation board? ›

This board is not suitable to walk directly over. Celotex would require a chipboard or OSB board to be placed over the top, which would spread any weight evenly and protect the board from getting damaged.

How thick should Celotex be? ›

These boards are available in thicknesses ranging from 25mm (37.5mm) to 65mm (77.5mm) with each insulation board bonded to a 12.5mm thick plasterboard. The PL products are high-performance boards generally applied to wall applications.

What is the minimum air gap for Celotex? ›

When Celotex is fitted between roof rafters, you need to ensure you leave an air gap of roughly 25mm – 50mm between the Celotex boards and the roof itself. This is to ensure air can circulate freely and to avoid damp or condensation.

Does Celotex need expansion gap? ›

The chipboard should be glued with appropriate adhesive and use temporary edges to provide a gap of around 10 to 12mm to allow expansion.

Can I use two layers of Celotex? ›

TB4000 can be used for overcoming thermal bridging and for use in two layer build ups including between and under rafters and over stud in timber frame wall lining applications.

What is the longest lasting home insulation? ›

Spray Foam (Polyurethane Foam)

Spray foam insulation is one of the most durable, effective, and reliable forms of home insulation. It can last a lifetime or longer. Because it is mold resistant and does not hold moisture, it doesn't move around and typically stays put until physically removed.

What is the R-value of PIR board? ›

Phenolic board would typically provide an R-value of around 5.0. The PIR or PUR board would typically provide an R-value of around 4.5.

Is PIR the best insulation? ›

Polyisocyanurate (PIR) is one of the most efficient insulation material used in construction. PIR insulation provides acoustic and thermal properties, rigidity, durability and excellent compressive strength.

What thickness of PIR insulation do I need? ›

The recommended thickness for PIR insulation in walls is typically around 125mm to achieve the recommended U-value of 0.17 W/m2K. The recommended thickness for PIR insulation in roofs is typically around 140mm to achieve the recommended U-value of 0.16 W/m2K.

What is the disadvantage of PIR? ›

Drawbacks or disadvantages of PIR sensor

They have lower sensitivity and less coverage compare to microwave sensors. ➨It does not operate greater than 35 degree C. ➨It works effectively in LOS (Line of Sight) and will have problems in the corner regions. ➨It is insensitive to very slow motion of the objects.

Can you walk on PIR insulation? ›

Can I walk on Deck-VQ® vacuum insulation panels? Yes, this is possible due to the protection layers in high density PIR and the compressive strength of 150 kPa (CS(10\Y)150).

How thick is a PIR insulation board? ›

Three types of PIR Insulation Boards available in different thicknesses, 12mm-45mm, 50mm-100mm and 110-150mm, all especially designed to eliminate thermal bridges, very easy to cut and shape and energy-efficient.

What is the max temp for PIR insulation? ›

The maximum operational temperatures for PUR and PIR are +100°C and +150°C respectively.

What temperature does PIR insulation ignite? ›

The temperature must exceed 250°C for a period of time before the occurrence of degradation, which may lead eventually to self-ignition. At this temperature most solid combustible material will exhibit signs of charring, one of the first steps in ignition.

Is PIR insulation board waterproof? ›

The ability of PUR/PIR insulation to resist water and to quickly revert to former performance after exposure to excess moisture makes it a preferred choice for flood resilient building.

Does PIR board need an air gap? ›

This gap provides ventilation and prevents moisture buildup, which can lead to mould and other problems. Insulation boards are no exception to this rule, and it's important to leave an air gap between them and the surface they're installed on.

What is the fire rating of Celotex GA4000? ›

Celotex GA4000 insulation boards do not catch fire easily and have a class 1 fire rating. They do not break easily and are apt for tough usage in spite of their lightweight and flexible character.

What is the difference between Rockwool and PIR? ›

Rockwool has a lower thermal insulating power. In other words, one will need more Rockwool to have the same insulation of PUR and PIR foams. What does that mean? It means that one can replace 50mm of PUR or PIR insulation with an 80mm Rockwool sandwich panel.

Is Celotex a Styrofoam? ›

Note that this product is styrofoam - that is a different material, it is NOT a polyisocyanurate foam board.

Where is Celotex manufactured? ›

Our Celotex PIR insulation is manufactured at two production facilities, Hadleigh in Suffolk and Eggborough in Yorkshire. While our ISOVER mineral wool insulation is manufactured from Runcorn in Cheshire.

What is the R value of Celotex fiberboard? ›

The company continues to produce Regular Insulation Sheathing as a 1/2-inch thick insulating board with an R-value of 1.2. Celotex Regular Insulation Sheathing is described in contemporary product literature as: Produced from cellulosic interlaced fiber bond with natural binders.

What is the warmest type of insulation? ›

The best insulation for walls depends on many circumstances. However, for open walls where budget is not a concern, spray-foam insulation typically delivers the highest resistance of heat flow.

What has the best R-value insulation? ›

Rigid foam board insulation is available in many materials, including polystyrene (R-3.8 to R-5.0), polyurethane (R-5.5 to R-6.5) and polyisocyanurate (R-5.6 to R-8.0). Since it has the highest R-value, rigid foam is typically reserved for foundations and basement walls.

Is Celotex warm? ›

Celotex is also effective in reducing noise pollution and keeping your home cooler in the summer and warmer in the winter. Celotex PIR insulation offers great thermal protection. If you are looking for an acoustic insulation, then Rockwool insulation is excellent at providing that.

What is the fire rating of Celotex XR4000? ›

Celotex GA4000 insulation boards do not catch fire easily and have a class 1 fire rating. They do not break easily and are apt for tough usage in spite of their lightweight and flexible character.

What is the compressive strength of Celotex XR4000? ›

Product Performance
Thermal Conductivity0.022 W/mK
Compressive Strength140 kPa at 10% compression
Vapour Resistance> 300 MNs/gm

What are the standard sizes of Celotex? ›

  • Under 50mm.
  • 50mm.
  • 60mm.
  • 70mm.
  • 75mm.
  • 80mm.
  • 90mm.
  • 100mm.

Is Celotex the best? ›

Celotex boards are a top choice for insulation because they offer a superior combination of thermal, acoustic and fire performance.

Should you wear a mask when cutting Celotex? ›

When cutting Celotex insulation, dust extraction equipment, eye protection and face masks should be provided. Dust or particles in the eyes should be washed out with liberal quantities of water. If skin is sensitive to fibre irritation, apply a barrier cream to exposed areas before handling.

Is Celotex ga4000 combustible? ›

It achieves a classification of E. In layman's terms, this means it is combustible and will contribute to the overall fire load.

What is the R-value of Celotex foam board? ›

Celotex GA4000 specifications
GA4000 boardsGA4050GA4090
R-value (m²K/W)2.254.05
Thickness (mm)5090
Width (mm)12001200
Length (mm)24002400

What happened to Celotex? ›

Celotex Asbestos Settlement Trust

Eventually, the amount of money Celotex was expected to pay to asbestos victims overwhelmed the company. It filed for Chapter 11 bankruptcy protection in 1990. It reorganized and emerged in 1996. Celotex Asbestos Settlement Trust.


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