Celotex

Celotex is the UK’s leading manufacturer of premium performance PIR insulation and remains the insulation specialist of choice. Celotex  Polyisocyanurate (PIR) insulation is the UK’s fastest growing insulation category, providing the perfect solution for meeting current and future Building Regulations and other carbon reduction programmes. PIR insulation delivers high thermal performance allowing homes and buildings to achieve premium levels of energy efficiency and with some of the thinnest possible solutions. The Celotex Company of Great Britain started trading in 1925, and was a subsidiary of its parent company, the Celotex Corporation of America.  The new PIR foam board manufacturing line started in 1978.


From September 2012 Celotex was acquired Saint-Gobain, the world leader in the habitat and construction markets. Celotex manufactures a wide range of high performance PIR insulation products, suitable for a variety of building applications offering thermal performance as low as 0.021 W/mK. Celotex achieves better U-values with a thinner solution helping to optimise space. Celotex products are supported with approvals and certificates from leading industry organisations. The highest quality Celotex products are available on-line at Insulation Shop, UK.

Celotex is able to produce boards as low as 12mm up to 95mm thick in a high speed continuous process. A second manufacturing line produces thicker panels and targets maximum efficiency for boards of 100-200mm thick. Both production lines produce a range of thicknesses in the standard panel sizes of 450x1200mm and 2400x1200mm. Flat Roofing products are available in thicknesses from 50-150mm in either 600x1200mm for bonded single-ply and built-up flat roofing applications and 2400x1200mm for mechanically fixed single ply systems. 

Celotex PIR insulation is leading in energy efficiency and sustainable construction providing the best solutions to assist with the reduction in carbon emissions and reducing fuel usage. Celotex products fully comply with BS EN 13165 and their performance characteristics have been verified through independent testing.

Types of Products
  • Multi-Purpose Insulation 
  • Cavity Wall Insulation,
  • Insulated Plasterboards,
  • Floor Insulation Boards,
  • Roof Insulation Boards
Multi-Purpose Insulation
  • Celotex TB4000 is a high performance PIR insulation ideal 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. It is available as thin as 12mm. It includes low emissivity foil facings offering enhanced thermal performance within cavity air spaces. It is suitable for use in a number of applications including roof, wall and floor systems.
  • Celotex GA4000 is a multi-purpose PIR insulation board that achieves an A+ rating when compared to the BRE Green Guide. It is suitable for a variety of applications, including roof, wall and floor insulation. It offers high performance insulation with low emissivity foil facings offering enhanced thermal performance within cavity air space.
Cavity Wall Insulation
  • Celotex CG5000 is manufactured from rigid polyisocyanurate (PIR) and faced with low emissivity textured aluminium foil facings. It is especially designed for partial fill cavity wall insulation, offering great thermal performance due to substantial R and U values. It has a super low lambda value of 0.021 W/mK delivering better U-values and thinner solutions and is certified under BBA certificate number 16/5343.
  • Celotex CW4000 is a simple solution for partial fill cavity walls that offers high performance PIR insulation with low emissivity foil facings offering enhanced thermal performance within cavity air spaces. Its enhanced features deliver thinner solutions that meet target U-values as required by Building Regulations including Part L and BREEAM. It is certified under BBA certificate number 16/5343.
  • Celotex CF5000 is a premium performance PIR insulation board that is suitable for use in full fill cavity wall applications. It makes use of the whole cavity width and optimises thermal performance through the wall achieving a lower U-value without having to widen the cavity and comes in dimensions to fit with standard cavity wall tie spacing. CF5000 has been mechanically engineered with a rebated edge to eliminate the passage of moisture. It is certified under BBA certificate number 16/5343.
Insulated Plasterboards
  • Celotex PL4000 comprises PIR insulation bonded to tapered edge plasterboard and is available in a broad range of insulation thicknesses as thin as 15mm. It is BBA certified. It allows for the installation of both the insulation and plasterboard in one operation, thereby reducing installation time and labour costs. It can be used to upgrade to current building regulation standards in pitched roof, flat roof and wall applications.
  • Celotex GD5000 is a premium performance PIR insulation board bonded to 12.5mm tapered edge plasterboard and is available in a broad range of insulation thicknesses as thin as 25mm. It also allows for the installation of both the insulation and plasterboard in one operation, thereby reducing installation time. It has an advantage over traditional PIR insulation boards due to the decreased thickness - even 15% thinner than the common PIR boards. Suitable for both dot and dab bonding and mechanically fixed installation techniques.
Floor Insulation Boards
  • Celotex FI5000 is a premium flooring insulation board with enhanced thermal performance as well as an A rating when compared to the BRE Green Guide and an innovative cement compatible composite facer with a built-in vapour control layer, enabling direct screed, without the need for an additional separating layer. FI5000 has an enhanced compressive strength value of ≥175 kPa making it the ideal solution for a range of flooring applications. Featuring a super low lambda of 0.021W/mK, FI5000 achieves compliance to UK Building Regulations with better U-values and thinner solutions.
Roof Insulation Boards
  • Celotex Crown-Fix is a brand new product for use in flat roof systems. It is a high performance rigid polyisocyanurate (PIR) insulation which delivers excellent dimensional stability and added robustness in a mechanically fixed single ply membrane flat roofing system. Low lambda 0.022W/mK offering high thermal performance.
  • Celotex Crown-Bond is a brand new product for use in flat roof systems. Crown-Fix is a high performance rigid polyisocyanurate (PIR) insulation which delivers excellent dimensional stability and added robustness in a bonded single ply membrane flat roofing system. Low lambda 0.022W/mK offering high thermal performance.
  • Celotex Crown-Up is a brand new product for use in flat roof systems. Crown-Fix is a high performance rigid polyisocyanurate (PIR) insulation which delivers excellent dimensional stability and added robustness in a built-up flat roofing system. Low lambda 0.022W/mK offering high thermal performance.
Celotex Handy Guide

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12mm Celotex TB4000 PIR Insulation Board

12mm Celotex TB4000 PIR Insulation Board

1200x2400mm - 2.88m2  show quantity discountsDelivery Time: 2 - 3 days

£12.81 (£15.37 inc VAT)

£4.45/m2 (£5.34/m2 inc VAT)

show quantity discounts
Due to nationwide shortage of PIR insulation lead time may be longer for this product.

Celotex TB4012 is targeted at ‘cut-to-fit’ applications between rafters or joists and enables users to achieve lower U-values with a single layer of insulation than has previously been possible. TB4012 is also appropriate for use in floors and walls. With low emissivity foil facings, TB4012 is manuf..

£12.81 (£15.37 inc VAT)

£4.45/m2 (£5.34/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
50mm Celotex GA4000 PIR Insulation Board

50mm Celotex GA4000 PIR Insulation Board

2400x1200mm - 2.88m2  show quantity discountsDelivery Time: 1 - 2 days

£22.78 (£27.34 inc VAT)

£7.91/m2 (£9.49/m2 inc VAT)

show quantity discounts
Due to nationwide shortage of PIR insulation lead time may be longer for this product.

50mm Celotex GA4050 is a multi-purpose insulation board that provides solution to overcome from the localized thermal bridges problem. Featuring a low emissivity foil facings, this board has been manufactured from tough polyisocyanurate (PIR) by using a perfect mix of certain blowing agent..

£22.78 (£27.34 inc VAT)

£7.91/m2 (£9.49/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
110mm Celotex XR4000 PIR Insulation Board

110mm Celotex XR4000 PIR Insulation Board

2400x1200mm - 2.88m2  show quantity discountsDelivery Time: 1 - 2 days

Guide Price: £49.48 (£59.38 inc VAT)

£17.18/m2 (£20.62/m2 inc VAT)

show quantity discounts
Due to nationwide shortage of PIR insulation lead time may be longer for this product.

Celotex XR4110 is targeted at ‘cut-to-fit’ applications between rafters or joists and enables users to achieve lower U-values with a single layer of insulation than has previously been possible. XR4110 is also appropriate for use in floors and walls. With low emissivity foil facings, XR4110 is manuf..

Guide Price: £49.48 (£59.38 inc VAT)

£17.18/m2 (£20.62/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
27.5mm Celotex PL4015 - 15mm PIR  Insulation Bonded to 12.5mm Plasterboard (PL4000)

27.5mm Celotex PL4015 - 15mm PIR Insulation Bonded to 12.5mm Plasterboard (PL4000)

1200x2400 - 2.88m2  show quantity discountsDelivery Time: 1 - 2 days

Guide Price: £34.28 (£41.14 inc VAT)

£11.90/m2 (£14.28/m2 inc VAT)

show quantity discounts
Due to nationwide shortage of PIR insulation lead time may be longer for this product.

Celotex PL4015 is a high performance thermal insulation board where the 15mm PIR insulation is bonded to 12.5mm tapered edge plasterboard. PL4015 is manufactured from rigid polyisocyanurate (PIR) using a blend of blowing agents that have zero ozone depletion potential (zero ODP) and low global ..

Guide Price: £34.28 (£41.14 inc VAT)

£11.90/m2 (£14.28/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
25mm Celotex CW4000 Rigid PIR Cavity Insulation Board (pack of 20)

25mm Celotex CW4000 Rigid PIR Cavity Insulation Board (pack of 20)

1200x450mm - 10.8m2  show quantity discountsDelivery Time: 3 - 5 days

Guide Price: £56.61 (£67.93 inc VAT)

£5.24/m2 (£6.29/m2 inc VAT)

show quantity discounts
Due to nationwide shortage of PIR insulation lead time may be longer for this product.

25mm Celotex CW4000 is an insulation board aimed specifically at partial fill cavity wall applications. It comprises a polyisocyanurate rigid foam insulation core, with a thermal conductivity of 0.022 W/mK and low emissivity aluminium foil facings on both sides. CW4000 is manufactured from rigi..

Guide Price: £56.61 (£67.93 inc VAT)

£5.24/m2 (£6.29/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
97mm Celotex CF5000 - External Wall Cavity Full Fill Insulation Board - Pack of 6 - CF5097 -pallet of 16

97mm Celotex CF5000 - External Wall Cavity Full Fill Insulation Board - Pack of 6 - CF5097 -pallet of 16

1200 x 450mm - 51.84m2  Delivery Time: 3 - 5 days

Guide Price: £1,349.91 (£1,619.89 inc VAT)

£26.04/m2 (£31.25/m2 inc VAT)

Due to nationwide shortage of PIR insulation lead time may be longer for this product.

97mm Celotex CF5000 is specifically designed for use within full fill cavity wall applications.  It is in compliance to UK Building Regulations by achieving a U-value of 0.18 W/m 2 K, maximising thermal performance without widening the cavity. BBA certified, Celotex CF5000 features a mechanical..

Guide Price: £1,349.91 (£1,619.89 inc VAT)

£26.04/m2 (£31.25/m2 inc VAT)

= m2
96mm Celotex TD4000 PIR Flat Roof Insulation Board with Plywood

96mm Celotex TD4000 PIR Flat Roof Insulation Board with Plywood

TD4000 - 2400 x 1200   show quantity discounts

Guide Price: £65.17 (£78.20 inc VAT)

£22.63/m2 (£27.16/m2 inc VAT)

show quantity discounts
Due to nationwide shortage of PIR insulation lead time may be longer for this product.

Celotex TD4000 comprises a polyisocyanurate rigid foam insulation core, with a thermal conductivity of 0.022 W/mK, and low emissivity aluminium foil facings on both sides bonded to a layer of 5.5mm WBP exterior grade plywood. APPLICATION Celotex TD4000 is purpose designed for use in l..

Guide Price: £65.17 (£78.20 inc VAT)

£22.63/m2 (£27.16/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
50mm Celotex Crown-Bond Flat Roof Board (pack of 11) -pallet of 12 packs

50mm Celotex Crown-Bond Flat Roof Board (pack of 11) -pallet of 12 packs

1200x600mm - 95.04m2  Delivery Time: 3 - 5 days

Due to nationwide shortage of PIR insulation lead time may be longer for this product.

50mm Celotex Crown-Bond is a brand new product for use in flat roof systems. Representing the next phase of Celotex innovation, Crown-Bond is a high performance rigid polyisocyanurate (PIR) insulation which delivers cutting edge thinness, increased dimensional stability and added robustness in a bon..

= m2
other thicknesses
100mm Celotex Crown-Up Flat Roof Board - pack of 6 - pallet of 12 packs

100mm Celotex Crown-Up Flat Roof Board - pack of 6 - pallet of 12 packs

1200x600mm - 51.84m2  show quantity discountsDelivery Time: 3 - 5 days

£1,186.86 (£1,424.23 inc VAT)

£22.89/m2 (£27.47/m2 inc VAT)

show quantity discounts
Due to nationwide shortage of PIR insulation lead time may be longer for this product.

100mm Celotex Crown-Up is a brand new product for use in flat roof systems. Representing the next phase of Celotex innovation, Crown-Up is a high performance rigid polyisocyanurate (PIR) insulation which delivers increased dimensional stability and added robustness in a built-up flat roofing system...

£1,186.86 (£1,424.23 inc VAT)

£22.89/m2 (£27.47/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
50mm Celotex Crown-Fix Flat Roof Board (pack of 24) - pallet of 2 packs

50mm Celotex Crown-Fix Flat Roof Board (pack of 24) - pallet of 2 packs

2400x1200mm - 138.24m2  Delivery Time: 3 - 5 days

£1,565.34 (£1,878.41 inc VAT)

£11.32/m2 (£13.58/m2 inc VAT)

Due to nationwide shortage of PIR insulation lead time may be longer for this product.

50mm Celotex Crown-Fix is a brand new product for use in flat roof systems. Representing the next phase of Celotex innovation, Crown-Fix is a high performance rigid polyisocyanurate (PIR) insulation which delivers excellent dimensional stability and added robustness in a mechanically fixed single pl..

£1,565.34 (£1,878.41 inc VAT)

£11.32/m2 (£13.58/m2 inc VAT)

= m2
other thicknesses
25mm Celotex GD5025 PIR Insulation Board with 12.5mm Plasterboard (pack of 26)

25mm Celotex GD5025 PIR Insulation Board with 12.5mm Plasterboard (pack of 26)

1200x2400mm - 74.88m2  show quantity discountsDelivery Time: 3 - 5 days

£1,137.91 (£1,365.49 inc VAT)

£15.20/m2 (£18.24/m2 inc VAT)

show quantity discounts
Due to nationwide shortage of PIR insulation lead time may be longer for this product.

Celotex GD5025 is a premium performance PIR insulation bonded to 12.5mm tapered edge plasterboard. Allows for the installation of both the insulation and plasterboard in one operation, thereby reducing installation time. Simplifies compliance to current building regulations for the upgrade of intern..

£1,137.91 (£1,365.49 inc VAT)

£15.20/m2 (£18.24/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
25mm Celotex GS5025 PIR Insulation Board with 9.5mm Plasterboard (pack of 26)

25mm Celotex GS5025 PIR Insulation Board with 9.5mm Plasterboard (pack of 26)

Celotex GS5025 - 74.88m2  show quantity discounts

Guide Price: £1,408.28 (£1,689.94 inc VAT)

£18.81/m2 (£22.57/m2 inc VAT)

show quantity discounts
Due to nationwide shortage of PIR insulation lead time may be longer for this product.

Celotex GS5025 is a premium performance PIR insulation board faced with low emissivity aluminum foils on both sides and bonded to 9.5 mm tapered edge plasterboard, providing an insulation product and a plasterboard in one. The product is designed for mechanically fixed applicatio..

Guide Price: £1,408.28 (£1,689.94 inc VAT)

£18.81/m2 (£22.57/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
25mm Celotex FR5000 Fire Resistant PIR Insulation Board (pack of 16)

25mm Celotex FR5000 Fire Resistant PIR Insulation Board (pack of 16)

1200x2400mm - 46.08m2  Delivery Time: 3 - 5 days

Due to nationwide shortage of PIR insulation lead time may be longer for this product.

Celotex FR5025 is one of the available dimensions of the Celotex FR5000 PIR insulation boards made from polyisocyanurate rigid core and faced on both side with low emissivity aluminum foils for improved thermal performance. The product is applicable to different types of constructions incl..

= m2
other thicknesses
75mm Celotex FI5000 Underfloor Heating Insulation Board (pack of 16) - pallet of 2 packs

75mm Celotex FI5000 Underfloor Heating Insulation Board (pack of 16) - pallet of 2 packs

1200x2400mm - 92.16m2  Delivery Time: 3 - 5 days

£2,020.22 (£2,424.26 inc VAT)

£21.92/m2 (£26.30/m2 inc VAT)

Due to nationwide shortage of PIR insulation lead time may be longer for this product.

75mm Celotex FI5000 is a premium flooring insulation board with enhanced thermal performance as well as an A rating when compared to the BRE Green Guide and an innovative cement compatible composite facer with a built-in vapour control layer (VCL), enabling direct screed, without the need for an add..

£2,020.22 (£2,424.26 inc VAT)

£21.92/m2 (£26.30/m2 inc VAT)

= m2
other thicknesses
50mm Celotex FF4000 Underfloor Heating Board (pack of 24)

50mm Celotex FF4000 Underfloor Heating Board (pack of 24)

FF4000 1200x2400 - 69.12m2  

Due to nationwide shortage of PIR insulation lead time may be longer for this product.

50mm Celotex FF4000 Underfloor Heating Board (pack of 24) Size: 1200mm x 2400mm Area per pack: 69.12m2 Thermal conductivity: 0.022 W/Mk R-Value: 2.25m2K/W Compressive strength: ≥150kPa Water vapour resistance: >150 MNs/g Weight: 1.81kg/m2   Celotex..

= m2
other thicknesses
50mm Celotex EL3000 Flat Roof Board (pack of 10)

50mm Celotex EL3000 Flat Roof Board (pack of 10)

EL3000 1200x600 - 7.20m2  

Due to nationwide shortage of PIR insulation lead time may be longer for this product.

Celotex EL3000 provides a quick and easy method of achieving effective thermal insulation in flat roofing structures. With coated glass tissue facings, EL3000 is manufactured from rigid Polyisocyanurate (PIR) using a blend of blowing agents that have zero ozone depletion potential (zero ODP) and a l..

= m2
other thicknesses
50mm Celotex TC3000 Flat Roof Board - Torch on (pack of 10)

50mm Celotex TC3000 Flat Roof Board - Torch on (pack of 10)

1200 x 600 - 7.2m2  Delivery Time: 3 - 5 days

Due to nationwide shortage of PIR insulation lead time may be longer for this product.

50mm Celotex TC3000 Flat Roof Board - Torch on (pack of 10) Size: 1200mm x 600mm Area per pack: 7.2m2 Thermal conductivity: 0.027 W/Mk R-Value: 1.85m2K/W Compressive strength: ≥150kPa Weight: 2.40kg/m2   Celotex TC3000 provides a quick and easy method of achie..

= m2
other thicknesses
90mm Celotex TA4000 PIR Insulation Board (pack of 13)

90mm Celotex TA4000 PIR Insulation Board (pack of 13)

1200x2400 - 37.44m2  

Due to nationwide shortage of PIR insulation lead time may be longer for this product.

90mm Celotex TA4000 PIR Insulation Board (pack of 13) Size: 1200mm x 2400mm Area per pack: 37.44m2 Thermal conductivity: 0.022 W/Mk R-Value: 4.05m2K/W Compressive strength: ≥150kPa Water vapour resistance: >150 MNs/g Weight: 3.09kg/m2   Celotex TA4000 p..

= m2
other thicknesses
50mm Celotex SW3000 External Wall Insulation Board (pack of 10)

50mm Celotex SW3000 External Wall Insulation Board (pack of 10)

1200x600 - 7.2m2  Delivery Time: 3 - 5 days

Due to nationwide shortage of PIR insulation lead time may be longer for this product.

50mm Celotex SW3000 is the perfect solution for the thermal upgrade of external solid walls. It provides a quick and easy method of achieving effective thermal insulation in external solid wall constructions where no insulation currently exists. With coated glass tissue facings on both sides, SW3000..

= m2
other thicknesses
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