20mm Celotex TB4020 PIR Insulation Board 2400mm x 1200mm

What Is 20mm Celotex TB4020?

Thermal bridges not only bring loss of heat, but they also cause the warm air inside your home to cool down when it comes into contact with cold surfaces; resulting in dreaded condensation and moulding. 

20mm Celotex TB4020 PIR Insulation is a BBA certified thermal insulation solution purposed to combat thermal-bridging in a variety of floor, wall and roof applications. 

The 2.4m x 1.2m boards are manufactured with a specially designed blowing agent that has zero ozone depletion potential (ODP) and low global warming potential (GWP); promising environmental kindness as well as maximum thermal efficiency with a thermal conductivity of just 0.022 W/m.K. 

20mm Celotex PIR boards feature an aluminium foil composite front that improves thermal conductivity in sealed cavity air spaces. 

Celotex TB4020 is also equipped with a BRE Green Guide rating A, which can be used in your BREEAM assessments to show environmental performance.

20mm TB4020 Celotex PIR Insulation Board Applications

20mm Celotex TB4020 boards are comprised of a fibre-free rigid polyisocyanurate core and low-emissivity foil facings on either side, offering an excellent thermal conductivity of just 0.022 W/m.K.

Specifically designed to eliminate thermal bridges, (as the 'TB' in its title states), TB4020 is suitable for roof, floor, and wall applications in new buildings or refurbishment projects. Thermal conductivity of 0.022w W/mK makes it the ideal solution for insulation. 

This includes pitched roofs, flat roofs, solid masonry walls, timber frames, and steel framed systems. It can also be used in solid floor systems such as screed and concrete slab floors, and as loft insulation between timber rafters. 

Thermal conductivity of 0.022w W/mK makes it the ideal solution for insulation

20mm Celotex TB4020 can be used in the following construction types:

• Ground Floor - Concrete Slab (perimeter upstand)
• Ground Floor - Beam and Block (perimeter upstand)
• Ground Floor - Suspended Timber Joists (perimeter upstand)
• Ground Floor - Upgrading Existing Concrete Slab (perimeter upstand)
• External Wall - Timber Frame Internal Linings
• External Wall - Masonry Cavity Internal Linings
• External Wall - Solid Masonry Internal Linings
• Pitched Roof - Below Timber Rafters
• Pitched Roof - Above Timber Rafters

20mm Celotex TB4020 Specifications

Celotex TB4020 insulation board is one of the thinnest PIR insulation sizes available, and is particularly effective at overcoming thermal bridging. 

20mm Celotex boards eliminate thermal bridges by providing a continuous layer of rigid polyisocyanurate PIR insulation within the building structure, providing long term energy savings. 

Let's have a look at the specs:

• Excellent thermal conductivity of 0.022w W/mK
• Low emissivity foil facing provides improved thermal performance in sealed cavity air spaces
• Complies with UK Building Regulations with better U-values and thinner solutions
• Zero Global Warming Potential (GWP) and Zero Ozone Depleting Potential (ODP)
• Easy to install
• BBA certified - Celotex TB4020 has been assessed by the BBA as fit for use in defined roof, wall and floor applications if installed, used and maintained as set out in the certificate
• Achieves a BRE Green Guide Rating of A, which can assist in demonstrating environmental performance in your BREEAM assessments
• Lightweight 2400 x 1200mm boards

20mm Celotex TB4020 Certifications

BS EN is British and European Standard Specifications. With over 100 years of experience, the British Standards Institute is recognised as the UK’s National standards body.

• Spread of flame: Euroclass E Reaction to Fire classification, according to BS EN 13501-1
• Thermal conductivity of 0.022 W/m.K, reducing the thickness of insulation required to hit the target U-value - BS EN 12667
• BRE Green Guide Rating of A for sustainability - which can assist in demonstrating environmental performance in your BREEAM assessments
• BBA certified

20mm Celotex TB4020 Insulation Storage & Handling

As they are super light and portable, 20mm Celotex TB4020 boards can also be handled and transported easily; making them a doddle to install. 

If you need to store 20mm Celotex TB4020 insulation boards for a while before installation, you should choose a cool, dry space.

Our rule of thumb when it comes to storage is that the boards should not be stored on the ground. Instead, pop them on a level surface and under a protective cover, just for good measure.

About Celotex

Celotex is a leading British manufacturer of 20mm Celotex TB4000 PIR insulation. Founded in the early 1920s, the company has since evolved from a fibreboard insulation company to one that solely focuses on PIR insulation boards.

The 20mm Celotex TB4020 insulation board is just one of many popular thermal insulation solutions in the Celotex product range. Celotex TB4000 PIR insulation range consists of thicknesses: 20mm, 25mm, 30mm, and 40mm.