Sopratherm 140mm XR4140 PIR Insulation Board 2400 x 1200mm

Sopratherm (By Soprema) 140mm High-Performance Foil Faced PIR Board

Sopratherm XR4140 is a versatile thermal insulation solution designed to eliminate cold spots and improve energy efficiency in modern construction. Previously known as Celotex XR4140, this product is 140mm thickness within the Sopratherm XR4000 series, which offers a variety of depths from 110mm upwards.

This rigid polyisocyanurate (PIR) board is engineered using sustainable blowing agents that feature zero ozone depletion potential (ODP) and minimal global warming impact. The core is protected on both faces by low-emissivity aluminium foil, which significantly boosts thermal performance.

These high-specification boards are tailored to help homeowners lower their utility bills and reduce a property’s total carbon emissions. During the summer months, the reflective properties of the foil facings help regulate internal temperatures, potentially lowering the need for active cooling systems. Sopratherm provides a reliable, long-term way to upgrade a building's thermal envelope.

Why Choose Sopratherm XR4140 (Rebranded from Celotex) Sheets?

• Thermal Bridging: Purpose-built to mitigate heat loss through structural bridges.

• Standard Dimensions: Available in a convenient 2400mm x 1200mm format with thicknesses between 110mm and 200mm.

• Versatility: Approved for a wide range of installation methods, including roofs, walls, and floor structures.

• Workability: Lightweight and simple to cut or shape on-site with standard hand tools.

• Enhanced Performance: Low-emissivity surfaces offer superior insulation within cavity air spaces.

• Durability: Delivers consistent, decades-long thermal protection for all building types.

Applications for Sopratherm Multi-Purpose Boards

The XR4100 range is a universal solution, suitable for the following applications:

• Pitched & Flat Roof Systems

• Solid Masonry & Timber Framed Walls

• Steel Frame Wall Lining

• Suspended Timber Joist Floors

• Concrete Slab & Beam Floors

• Internal Wall Insulation

With a thermal conductivity (lambda value) of just 0.022 W/mK, Sopratherm is a market leader for projects where maximum insulation is required but space or depth is limited.

Technical Specifications:

Thermal Conductivity: 0.022 W/mK

R-Value: 5.45 m²K/W

Weight: 5.71 kg/m²

Thickness: 140mm

Board Coverage: 2.88m²

Compressive Strength: ≥140kPa (BS EN 826)

Core Material: PIR (Polyisocyanurate)

Vapour Resistance: >150MNs/g (BS EN 12086)

Fire Classification: Euroclass E

For the best trade prices on 140mm Sopratherm (the new name for Celotex), trust us for competitive rates and rapid delivery to your site.