Celotex 25mm PIR Rigid Insulation Board – TB4025 – 2.4m x 1.2m

2 customer reviews

£16.00 ex VAT

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Celotex TB4025 is a multi purpose rigid PIR insulation board that forms a part of the Celotex TB4000 range. The Celotex 25mm insulation board can be used in a variety of applications. This includes roofs, floors and also walls. More specifically the Celotex 25mm PIR board can be used in flat roofs, pitched roofs, floors, solid masonry walls as well as timber framed and steel framed systems. The Celotex TB4025 insulation board has the length and width dimensions of 2400 x 1200mm. This board is 25mm in thickness and features low emissivity foil facings. The Celotex 25mm PIR board itself boasts an excellent thermal conductivity of 0.022 W/m.K.

Celotex TB4025

The Celotex TB4025 is manufactured from rigid polyisocyanurate (PIR). The process uses a blowing agent that has zero ODP, which is otherwise known as Zero Ozone Depletion. In addition to this, it also has low global warming potential (GWP). The Celotex TB4025 is a popular board due to its energy efficiency for commercial, domestic and industrial applications. The product itself has a total coverage of 2.88m2

25mm Celotex is a high performance PIR board, which is suitable for many types of applications.

25mm Celotex Features

  • Celotex PIR Board is easy to cut & shape
  • Good reaction to fire in accordance with EU standards
  • Made from high performing PIR
  • Provides long term energy savings for buildings
  • Features low emissivity foil facings for enhanced performance
  • Celotex is a recognised insulation brand

TB4025 Applications

TB4025 can be used in a variety of application types. This includes roofs, walls and even floors. The versatility of the Celotex 25mm insulation board is a top reason why so many people use it. More specifically Celotex 25mm can be used for flat roofs, pitched roofs, solid masonry walls and floors as well as timber framed & steel framed systems. The industry leading board is easy to cut and shape as well as install. The benefit of Celotex 25mm boards is that they can provide long term energy savings for buildings. Full application types 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

Celotex 25mm insulation board

The Celotex 25mm insulation board has a square edge with a total coverage of 2.88m2.

Celotex insulation boards are multi purpose rigid insulation boards. The product achieves a BRE Green Guide A rating. In addition to this, Celotex insulation products are BBA certified.

We take pride in being a 5 star rated seller of Celotex 25mm. Order online today for express delivery.

At insulationboard.co.uk we are the home of PIR insulation boards. We have streamlined our ordering process and have created our pioneering 3 step ordering system. Our website offers our best price on Celotex 25mm PIR boards. If you have any questions, you can drop us an email or use our handy live chat.

Additional information
















Square Edge

Compressive Strength

≥120kPa – BS EN 826



Thermal Conductivity

0.022 W/mk – BS EN 12667

Water Vapour Resistance

>150MNs/g – BS EN 12086: Method B

Spread Of Flame

Class 1 – BS 476-7

2 reviews for Celotex 25mm PIR Rigid Insulation Board – TB4025 – 2.4m x 1.2m

  1. Oliver Bennet

    Got my order within a week.

  2. Duncan Headley

    Used instead of 20mm. Decent product.

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