Celotex Insulation
Celotex insulation is the leading manufacturer multi-purpose insulation boards that provides solutions for cold spots in walls, floors, roofs, cavities and many more areas. These cold spots are usually created by a lack of insulation, leading to dampness and condensation. This is where Celotex insulation comes in.
We stock popular Celotex insulation ranges, including GA4000, TB4000, XR4000, PL4000 and CW4000, and can help you find the wall insulation, floor insulation, roof insulation or cavity insulation that you require.
We offer Celotex insulation boards that can cover between 2.88m² and 25.92m², with thicknesses between 12mm and 200mm so you’re sure to find the right product for your application. These boards are cost-effective, lightweight, strong and easy to install, making them a popular insulation choice.
Celotex insulation is manufactured from tough polyisocyanurate (PIR), using a perfect mix of certain blowing agents, which acquires zero Ozone Depletion Potential (zero ODP) and a low global warming impact. This makes it great for the environment, as well as for your heating and cooling costs, as it has a thermal conductivity of 0.022W/mK.
Celotex has achieved an A+ rating when it is compared to the BRE Green Guide and has certification from BBA. The Celotex insulation boards also have a good reaction to fire when measured in accordance with new European standards. It achieves the required U-values and will help you to meet current and future Building Regulations.
All Celotex products are readily available from Insulation4less with lead times of 3 to 5 days. If you need any help deciding on the right Celotex insulation for your project, get in touch with our team on 020 3582 6399 or via our Live Chat .
Category


- Versatile Celotex GA4000 insulation boards for floors, walls, and roofs.
- Low emissivity foil face enhances thermal performance.
- Environmentally friendly, durable, lightweight, and easy to install with class 1 fire rating.
- Regular price
- £11.40£13.68
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- £11.40 £13.68
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- Regular price
- £17.30£20.76
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- £17.30 £20.76
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- Regular price
- £29.25£35.10
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- £29.25 £35.10
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- Regular price
- £11.40£13.68
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- £11.40 £13.68
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- Streamlined installation with Celotex PL4000: combines PIR insulation with plasterboard for one-step efficiency.
- Versatile techniques: choose between 'dot and dab' or mechanically fixed installation for flexibility.
- Energy-efficient solution: tapered edge plasterboard for professional finish, suitable for various projects.
- Regular price
- £33.20£39.84
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- £33.20 £39.84
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- Regular price
- £23.80£28.56
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- £23.80 £28.56
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- Durable Celotex TB4000 Insulation Board
- Exceptional thermal conductivity (0.022W/mK)
- Cost-effective, strong, easy to install, and long-lasting
- Regular price
- £11.40£13.68
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- £11.40 £13.68
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- Regular price
- £35.90£43.08
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- £35.90 £43.08
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- Environmental-friendly PIR insulation board with foil facings
- High thermal conductivity (0.022W/mK) eliminates cold spots, reduces energy usage, and lowers bills
- Certified with A+ rating, BBA certificates, and meets Building Regulations; easy to install, strong, and long-lasting
- Regular price
- £35.90£43.08
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- £35.90 £43.08
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- Regular price
- £16.50£19.80
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- £16.50 £19.80
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- Economical, lightweight, and durable PIR insulation board.
- Features low emissivity foil for enhanced thermal conductivity.
- Environmentally safe, fire and water-resistant with long-term performance.
- Regular price
- £24.09£28.91
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- £24.09 £28.91
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- Easy to install in various applications.
- Thick PIR board with high thermal performance.
- Manufactured with low emission standards.
- Regular price
- £44.90£53.88
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- £44.90 £53.88
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- Regular price
- £22.30£26.76
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- £22.30 £26.76
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- Celotex GA4090: 90mm PIR insulation board
- Thermal conductivity: 0.022W/mK
- Eco-friendly, complies with regulations, trusted for 9 decades
- Regular price
- £29.65£35.58
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- £29.65 £35.58
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- Cost-effective Celotex TB4030 PIR insulation board
- Lightweight, easy installation, high tensile strength
- Fire and water-resistant, eco-friendly, long-lasting insulation for walls, roofs, and floors
- Regular price
- £13.30£15.96
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- £13.30 £15.96
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- PIR insulation with zero ODP and low GWP.
- Reduces installation time with combined insulation and plasterboard.
- Suitable for various applications including roofs and walls.
- Regular price
- £33.20£39.84
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- £33.20 £39.84
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- Regular price
- £27.45£32.94
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- £27.45 £32.94
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- Regular price
- £43.85£52.62
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- £43.85 £52.62
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- PIR insulation with zero ODP, low GWP
- Combines insulation and plasterboard
- Speeds up installations, suitable for various applications
- Regular price
- £42.40£50.88
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- £42.40 £50.88
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- Superior thermal insulation with 0.022 W/mK conductivity
- 1200 x 450 mm boards, A+ rated for energy efficiency
- Zero CO2 emissions, CFC/HCFC free, easy installation
- Regular price
- £43.95£52.74
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- £43.95 £52.74
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- Rigid PIR construction with zero ozone depletion
- Combines insulation and plasterboard for swift installation
- Meets regulations, offers long-term energy savings
- Regular price
- £51.90£62.28
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- £51.90 £62.28
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- High-Performance Insulation: PIR composition, 0.022W/mK thermal conductivity.
- Environmentally Friendly: Zero ODP, low global warming impact.
- Versatile & Certified: Eliminates cold spots, meets Building Regulations, and offers energy savings.
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- Cut-to-fit for rafters/joists
- High thermal performance
- Environmentally friendly
- Regular price
- £44.95£53.94
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- £44.95 £53.94
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- Regular price
- £12.72£15.26
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- £12.72 £15.26
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- Size: 1200 x 450 mm, 50mm thickness
- Thermal Conductivity: 0.022 W/mK, Aluminium Foil Facings
- Eco-Friendly: Low GWP, zero ODP, CFC/HCFC-free
- Regular price
- £47.90£57.48
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- £47.90 £57.48
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- Premium 130mm Celotex XR4130 insulation
- Polyisocyanurate (PIR) for eco-friendly high performance
- Cost-effective, BBA certified, A+ rating, meets Building Regulations
- Regular price
- £43.95£52.74
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- £43.95 £52.74
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- Cost-effective, high-performance insulation board
- Thermal conductivity of 0.022W/mK, suitable for various applications
- Environmentally friendly with zero ozone depletion potential
- Regular price
- £38.50£46.20
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- £38.50 £46.20
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- 75mm Celotex CW4075 insulation boards: 0.022 W/mK thermal conductivity, aluminum foil facings, and 120kPa compressive strength.
- Eco-friendly: A+ rating in BRE Green Guide 2008, CE marked to BS EN 13165:2001, CFC/HCFC-free.
- Convenient: Fit between cavity wall ties using clips, providing over 4.32m² coverage per board.
- Regular price
- £43.95£52.74
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- £43.95 £52.74
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- 165mm Celotex XR4000 PIR insulation board
- Achieves A+ rating, low U-values, and BBA certifications
- Easy installation, cost-effective, long-lasting thermal performance
- Regular price
- £778.00£933.60
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- £778.00 £933.60
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- Regular price
- £44.80£53.76
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- £44.80 £53.76
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- High-performance Celotex XR4200 insulation board
- Low global warming impact, zero ozone depletion
- Superb thermal conductivity, easy installation
- Regular price
- £935.40£1,122.48
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- £935.40 £1,122.48
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- Regular price
- £613.35£736.02
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- £613.35 £736.02
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- Regular price
- £857.06£1,028.47
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- £857.06 £1,028.47
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- Low thermal conductivity: 0.023 W/mK, aluminium foil facings
- Certified: A+ in BRE Green Guide 2008, CE marking compliant
- Environmentally friendly: zero ODP, low GWP materials
- Regular price
- £925.95£1,111.14
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- £925.95 £1,111.14
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- Regular price
- £95.56£114.67
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- £95.56 £114.67
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- Regular price
- £91.55£109.86
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- £91.55 £109.86
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celotex cg5000 celotex floor insulation celotex fr5000 fire rated celotex insulated plasterboard celotex pl3000 insulated plasterboard celotex roof insulation celotex sw3000 celotex tc3000 celotex wall insulationCELOTEX GUIDE
Celotex Insulation board is a multi-purpose insulation board that provides solutions to overcome cold spots in walls/floors/roofs/cavities and much more. Cold spots can be created from the lack of insulation in some areas which can cause damp to appear on walls or condensation. Celotex insulation boards consists of foil facings on both sides.
1. WHAT IS CELOTEX MADE OF?
Celotex is pir insulation with two foil facings on the outsides. It has been manufactured from tough polyisocyanurate PIR by using a perfect mix of certain blowing agents which acquires zero ozone depletion potential (zero ODP) and a low global warming potential. In other words, this product is easy on the environment and will keep your home warm for many years after it is installed. Thus saving on your heating and cooling costs.
2. WHAT IS THIS PRODUCT USED FOR?
Celotex boards can be used in many different applications. We will list just some of the applications this insulation board is most used for today below.
- Subfloor applications
- First floor in between ceiling joists
- Attic space between ceiling joists
- Roof space cut between rafters
- Basement internal walls
- Crawlspaces under suspended floors
- Timber frame construction on internal and external walls
- Masonry construction on internal and external walls
- Steel framed construction on internal and external walls
Of course, this is not an exhaustive list of applications for this product. There are many more applications in which we have seen these products used in such as caravans, campervans, industrial uses such as oil refineries, tunnels, trains, buses and so much more. So if you think you may not be able to use Celotex in a certain application think again and call us.
3. CELOTEX INSULATION BOARDS THICKNESS?
Celotex thicknesses goes from 12mm right up to 200mm with various different product codes for different applications. Below we will outline some of them.
TB4000 Range: TB4012, TB4020, TB4025, TB4030, TB4040
GA4000 Range: GA4050, GA4060, GA4070, GA4075, GA4080, GA4090, GA4100 ( Celotex 100mm)
XR4000 Range: XR4110, XR4120, XR4130, XR4140, XR4150, XR200
PL4000 Range: PL4015, PL4025, PL4040, PL4050, PL4060
CW4000 Range: CW4050, CW4060, CW4075, CW4085, CW4100
All the above products are readily available with Insulation4less with 3 - 5 day lead times.
Celotex is a high performing multi purpose insulation board that is environmental-friendly. It certainly helps in reducing the excessive and unnecessary usage of energy and resources like the use of gas or oil-fired boilers within the home. Thus reducing your carbon footprint over many years. In warmer climates, it will also reduce the need for air conditioning units by keeping the heat out and the cold in. It is designed to eliminate cold spots and has an excellent performance in timber frame and masonry walls. It features a thermal conductivity of 0.022W/mK for providing better insulation.
Celotex and Isover Benefits and cost savings:
Celotex provides reliable and long-term energy-saving solution for buildings of all shapes and sizes, which ultimately results in low-cost electricity and heating bills. It is suitable in numerous applications such as roof, floor, walls, basements and attics. It is ideal for overcoming thermal bridging. It achieves the required U-values with minimum thickness with ease. It is often used as thermal insulation for floor systems, and flat roofs. It also helps in meeting the current as well as future requirements of the Building Regulations.
Celotex Insulation Board Certifications:
Celotex has achieved A+ rating when it is compared to BRE Green Guide and has certification from BBA certificate number 95/3197 and 09/4667.
The A+ rating is for all Celotex Insulation solutions within its range. Including TB4000, GA4000 and XR4000 ranges.
Celotex Insulation Board Key Features:
- Features a good reaction to fire when measured in accordance with new European standards
- Comes in conveniently sized boards for installation between cavity wall ties
- A very cost-effective insulation
- Very strong product that will not break easily
- Easy to install and handle
- Keeps performing long after it is installed for many many years
- Lightweight product and easy to unload off a truck
- Easy to cut making it easy then to install
- Lightweight for ease of manoeuvring around site
- Celotex Insulation has foil facings on both sides
Recent Name Change:
Recently Celotex boards went under strict review due to the Grenfell Tower incident. As a result, most of the general application boards (Celotex GA4000 and Celotex TB4000 range) were downgraded in their thermal performance from 0.022 to 0.023. As a result of this Celotex changed the names of the boards affected by this to TB3000 and Celotex GA3000 range.
This change as a result of the Grenfell Tower disaster has now been undone. Celotex and local government testing has done extensive testing on all the Celotex range and as a result, the new Celotex TB4000 and Celotex GA4000 range meets the required standards to meet the Thermal Conductivity of 0.022. As of now all Celotex range of products like celotex floor insulation are listed here meets and exceeds all requirements set upon it.
Summary
In conclusion, with all the above information it's easy to see why Celotex insulation board is such a popular choice of pir insulation for both domestic and commercial properties. By choosing celotex you can be rest assured that you will get great results.
For further details on Celotex Products please contact us here and we will be happy to assist you.