Dimensions 2400 × 1200 mm
Brand

Celotex

Thickness

20mm

Material Type

Polyisocyanurate (PIR)

Pieces Per Pack

1

Sales Unit

Board

Unit Coverage

2.88m2

Manufacturers Reference

TB4020

Thermal Conductivity

0.022W/mK

Density

31kg/m3

Fire Rating

Euroclass F

Edge Type

Square

Facing

Low Emissivity Foil

Weight (kg/m2)

0.79kg/m2

Product Range

Celotex TB4000

Useful Information
20mm Celotex is the smallest size PIR Insulation Board you can purchase

20mm Celotex Insulation Board – TB4020 (2400mm x 1200mm x 20mm) 2.88m2

(13 customer reviews)
Delivery In 2-4 Working Days
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£12.19 ex VAT

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Useful Information
20mm Celotex is the smallest size PIR Insulation Board you can purchase

Celotex 20mm PIR Insulation Board

Celotex TB4020 is a highly versatile PIR board from Celotex. This multi-purpose rigid insulation board is ideal for a variety of applications. This includes solid floors, pitched roofs, flat roofs, masonry walls and steel framed and timber framed systems. 20mm Celotex is easy to handle and boasts excellent thermal qualities. This is a reason why the TB4020 20mm Celotex PIR board is so popular. Celotex TB4020 forms part of the TB4000 range. The Celotex brand is a part of the Saint-Gobain family. Saint-Gobain is a leading manufacturer of insulation boards. The Celotex TB4000 range is at the very core of the Celotex product range. This makes the TB4020 (20mm Celotex) variation a leading choice in construction projects.

Celotex 20mm insulation boards are made from rigid polyisocyanurate (PIR). TB4020 insulation boards have zero ozone depletion potential, which is known in the industry as zero ODP. It also boasts low global warming potential (GWP). Celotex 20mm Insulation Board features aluminium low emissivity foil facings on both sides. This innovative foil-facing technology vastly improves thermal performance in sealed cavity air spaces.

Celotex 20mm insulation board is a high-performing PIR board that is environmentally friendly. It is designed to reduce energy bills and therefore reduce carbon footprint. In the summer months, it also reduces the need for air conditioning as it will keep the heat out. The 20mm Celotex PIR board boasts outstanding performance when used in timber frames and masonry walls. 20mm Celotex insulation board has a thermal conductivity rating of 0.022W/mK. In addition to this, the TB4020 has a Green Guide Rating of A, which is the standard set by the BRE (Building Research Establishment). A rating of A means that the TB4020 board rates great for environmental performance. This means not only is 20mm Celotex better for the planet, but it can also help provide long-term energy savings.

Celotex 20mm Features

  • Easy to cut and therefore shape
  • Celotex is cost-effective
  • Good reaction to fire in accordance with EU standards
  • A durable and reliable insulation board
  • Made from high-performing PIR
  • Provides long-term energy savings for buildings
  • Features low emissivity foil facings for enhanced performance

TB4020 Application

20mm Celotex insulation boards can be used in a variety of applications. For example, this includes flat roofs, pitched roofs, solid masonry walls, floors, timber-framed, and steel-framed systems. The industry-leading board is easy to cut and shape for use. Furthermore, it can be dot and dabbed. Celotex insulation boards provide long-term energy savings for buildings. 20mm Celotex is manufactured in accordance with quality management systems (BS EN ISO 9001:2000). Celotex 20mm is quick and easy to install therefore making it a great choice for building projects. TB4020 is just one of many products that make up the TB4000 range. Full application types of this 20mm insulation board can be found below.

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

20mm Celotex

Get our best price available on all Celotex boards. Order now for quick delivery and save on your project today. Are you looking for a different thickness of Celotex Insulation? We sell a range of Celotex products on our website. Furthermore, we sell a whole range of top brands at trade prices. If you need help, get in touch with us. Our friendly team of experts is at hand to give you advice.

Celotex has a broad selection of insulation board thicknesses. The thickness can range from 12mm up to 200mm.
Visit the following link for all Celotex Insulation Boards

This product has square edges and measures 2.4m in length and 1.2m in width. The total coverage for this product is 2.88m2.

Download the BBA certificate

If you want further information on this product, you can visit the Celotex website. Here you can find full product specifications as well as full datasheets.

At Trade Insulations, we take pride in providing top brands at trade prices. Why pay more for your insulation when you can use us?

Did you know that the TB4020 is one of our top-rated products? 20mm Celotex is by far the best-selling product on our website, and we continue to honour our very best prices on this quality PIR insulation board.

Do you have an upcoming project that requires 20mm Celotex? Order online now for express delivery. Our friendly team will be in touch to confirm your date and work with you to ensure that the whole process runs smoothly. Furthermore, we take customer satisfaction very seriously and go the extra mile to help our customers. As a result, we are 5-star rated online. We are a supplier you can trust. Finally, an insulation supplier that won’t let you down!


Dimensions 2400 × 1200 mm
Brand

Celotex

Thickness

20mm

Material Type

Polyisocyanurate (PIR)

Pieces Per Pack

1

Sales Unit

Board

Unit Coverage

2.88m2

Manufacturers Reference

TB4020

Thermal Conductivity

0.022W/mK

Density

31kg/m3

Fire Rating

Euroclass F

Edge Type

Square

Facing

Low Emissivity Foil

Weight (kg/m2)

0.79kg/m2

Product Range

Celotex TB4000

Dimensions 2400 × 1200 mm
Brand

Celotex

Thickness

20mm

Material Type

Polyisocyanurate (PIR)

Pieces Per Pack

1

Sales Unit

Board

Unit Coverage

2.88m2

Manufacturers Reference

TB4020

Thermal Conductivity

0.022W/mK

Density

31kg/m3

Fire Rating

Euroclass F

Edge Type

Square

Facing

Low Emissivity Foil

Weight (kg/m2)

0.79kg/m2

Product Range

Celotex TB4000

13 reviews for 20mm Celotex Insulation Board – TB4020 (2400mm x 1200mm x 20mm) 2.88m2

  1. Sarah

    Smooth delivery and helpful driver. Would use again.

  2. Jacob Swissgo

    Used 25mm instead – worked fine

  3. Melaine Hussaf

    Nice and easy order, ordered 30 sheets of 20mm Celotex and arrived in a couple of days. very nice staff.

  4. Sophie Lewis

    phoned my local builders merchant who advised no longer make 20mm Celotex, found Trade Insulations who advised can deliver in a couple of days I thought I would risk the order. When I received my order I can confirm was all 20mm Celotex. Thanks to George at Trade Insulations for helping me.

  5. Jamie Birch

    I thought this would be a lot heavier

  6. Marty

    Great website and easy to use. Thanks again lads.

  7. Reece Lethbridge

    couldn’t get the 20mm anywhere but these guys had it.

  8. Danny Harris

    Don’t bother get 25mm

  9. bill l

    great product, does the job, will buy gain when needed!

  10. brian b

    fast delivery, friendly guys bit thin but suppose that’s what you get for 25mm!

  11. terry t

    great product, does what it says on the tin, helped me get my antique fireplace sorted
    fast delivery will use these guys for commercial next year

  12. Mark Feeris

    Not necessarily a bad product but too thin!

  13. Whitney

    Was advised they no longer stock 20mm only 25mm.

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Please login to post questions

Question:

Can I use 20mm Celotex insulations in my Caravan?

jamie_gill
08-Feb-2023

Answer:

Yes, 20mm Celotex boards can be used to insulate your caravan. Similarly, people converting a camper-van or mobile home will use a thin Celotex PIR insulation board to insulate their home.

Question:

What way should the Insulation board face when I install it?

jamie_gill
08-Feb-2023

Answer:

Both sides have low emissivity foil facing and can be installed either way.

Question:

What u-value does a 20mm celotex insulation board achieve?

insulationadmin
08-Feb-2023

Answer:

The thermal conductivity is 0.022 W/mk. The u-value can be calculated with the full build up i.e bricks, blocks, skim, render etc.

Question:

does this board have a vapour barrier?

insulationadmin
08-Feb-2023

Answer:

Yes the 20mm Celotex insulation board has a vapour barrier due to both sides having a Low emissivity foil facing.

Celotex is a leading manufacturer of insulation products. Celotex is a part of the Saint-Gobain Insulation UK group and has been innovating the insulation market since 1925. Celotex provides a large range of insulation solutions from plasterboard to PIR insulation boards. They provide a variety of solutions for different market sectors and also applications. Saint-Gobain believes in creating great living places and improving daily life. They have good technical support and are a trusted name in the business. At Trade Insulations, we offer the best prices on Celotex board.

Celotex TB4000 Datasheet
BBA Certfication - Timber Frame
BBA Certfication - Floors
BBA Certfication - Pitched Roofs
BBA Certfication - Dry Lining

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