What Celotex Group Ltd. does

Celotex Group Ltd. is a UK-based manufacturer of PIR (polyisocyanurate) insulation products, headquartered in Ipswich and operating with 251-500 employees. Founded in 2004, the company produces high-performance insulation boards for residential and commercial construction applications across wall, floor, and roof assemblies. Its core product range includes the Thermaclass Cavity Wall 21 partial fill cavity wall board, the XR4000 and GA4000 floor insulation boards for beam and block or screeded systems, and broader PIR boards for pitched and flat roof applications. The company has additionally been identified as a participant in the European rainscreen cladding and cold insulation markets.

Since 2024, Celotex has been owned and operated by SOPREMA Group, a French-headquartered multinational construction materials group with over 100 years of operating history. Celotex products are now marketed under the SOPREMA UK PIR Insulation portfolio, with the Celotex brand continuing as a sub-brand identity. The business operates a sales-led B2B go-to-market targeting construction professionals — architects, specifiers, contractors, and building merchants — through direct sales in the UK construction market. Revenue is generated via hardware sales of insulation boards under a quote-based pricing model. The company supports specification-driven sales with a deep technical services stack: U-value compliance calculations, WuFi moisture analysis, CAD design, BIM library entries, NBS specifications, and drone survey services for roof assessment. SOPREMA Group holds ISO 9001 certification at the parent level. The business carries significant reputational headwinds from the Grenfell Tower Inquiry Phase 2 Report, which documented systematic dishonesty by Celotex in fire safety testing processes.

Name

Celotex Group Ltd.

Legal name

Celotex Group Ltd.

Website

https://celotex.co.uk

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

251–500 employees

Short description

Celotex Group Ltd. is a UK-based PIR insulation board manufacturer serving residential and commercial construction, operating as the SOPREMA UK PIR Insulation division since its 2024 acquisition by SOPREMA Group.

Ownership category

akta.pro rank

Product category

Building Insulation Manufacturing

NAICS

Urethane and Other Foam Product (except Polystyrene) Manufacturing (32615)

SIC

Plastic Materials, Synth Resins & Nonvulcan Elastomers (2821)

akta.pro primary industry

Foam Plastic Insulation (EPS/XPS/PIR/PUR) (IMADAGAD)

akta.pro secondary industries

Roof Insulation & Cover Boards (IMADAFAN), Building Envelope & Waterproofing (Siding, Stucco, Sealants) (EDAOAAAL)

Keywords

• PIR insulation products
• Building insulation materials
• Cavity wall insulation
• Floor insulation boards
• Construction insulation solutions

Headquarters

HQ city

Ipswich

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. PIR Insulation Product Sales: Manufacture and sale of PIR (polyisocyanurate) insulation products including cavity wall insulation, floor insulation, and roof insulation solutions for residential and commercial construction applications

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Celotex Group Ltd. manufactures and sells PIR (polyisocyanurate) insulation products for the UK construction market, including cavity wall insulation (e.g., Thermaclass Cavity Wall 21), floor insulation boards (XR4000, GA4000), and roof insulation solutions. The company, now operating as part of SOPREMA UK, supports its insulation range with technical specification services such as U-value calculations, WuFi moisture analysis, CAD designs, and drone surveys for building professionals.

Product overview

Celotex Group Ltd. is a UK-based insulation manufacturer that has been integrated into SOPREMA's operations. The company specializes in PIR (polyisocyanurate) insulation products, including Thermaclass Cavity Wall 21 for partial fill cavity wall applications, XR4000 and GA4000 boards for floor insulation systems. Celotex products serve residential and commercial construction markets across wall, floor, and roof applications. The company was also identified as a key player in the rainscreen cladding and cold insulation markets, though it has been associated with controversy following the Grenfell Tower Inquiry findings regarding systematic dishonesty in product testing processes.

Differentiator

Problem solved

Functional benefit

Products and services

• PIR Insulation Polyisocyanurate (PIR) insulation products, formerly sold under the Celotex brand, now integrated into SOPREMA's insulation portfolio. Includes boards for wall, floor, and roof applications used by construction professionals in residential and commercial buildings.
• Thermaclass Cavity Wall 21 Partial fill cavity wall insulation board designed for out-to-in installation, providing thermal performance for residential wall applications and helping meet building regulations.
• XR4000 Floor Insulation PIR insulation board designed for floor applications, suitable for beam and block systems or installation between joists in intermediate timber floor constructions.
• GA4000 Floor Insulation PIR insulation board for floor applications, compatible with beam and block systems and screed installations, providing thermal insulation for floor constructions.
• Rainscreen Cladding Systems Cladding and insulation solutions for rainscreen facade systems used in commercial and residential construction, addressing energy efficiency and weather resistance requirements.
• Cold Insulation Solutions Insulation products designed for cold storage facilities and industrial applications where thermal performance in low-temperature environments is critical.

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• SOPREMA GroupcoreOEM/ Whitelabel/ Licensing PartnerCelotex brand and operations acquired and integrated under SOPREMA Group, now operating as SOPREMA UK PIR Insulation division. The Celotex brand continues as part of SOPREMA's insulation product portfolio, with SOPREMA leveraging its 100+ years of construction expertise to support the Celotex product lines.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Emerging players

• Armacell: Manufacturer of flexible elastomeric foam insulation primarily for HVAC and technical applications, with adjacent product technology to PIR. Compares to Celotex on polyurethane-based insulation chemistry, though focused on different end uses.

Broad incumbents

• Bauder: UK-based manufacturer of flat roof waterproofing and insulation systems. Comparable UK specification channel and overlapping commercial/industrial roofing install base where both insulation and waterproofing are bundled.
• Johns Manville: US-based Berkshire Hathaway-owned manufacturer of building insulation including rigid foam boards and mineral wool. Comparable commercial/industrial construction envelope applications and PIR/XPS product overlap.
• Knauf Insulation: Global insulation manufacturer offering mineral wool, wood fibre, and other non-combustible insulation solutions. Serves the same residential and commercial envelope applications as Celotex and is gaining specification share in fire-sensitive buildings post-Grenfell.
• IKO: Multi-national roofing and insulation manufacturer offering built-up roofing systems that include insulation. Competes with Celotex for commercial roof assembly specifications in UK and European markets.

Direct peers

• Rockwool International: Danish manufacturer of stone wool insulation serving the same residential and commercial building envelope applications as Celotex. Directly competes in rainscreen, facade, and roof insulation and gains share in non-combustible alternatives following the Grenfell Inquiry.
• Recticel Insulation: Belgian manufacturer of PIR and PUR insulation boards used in walls, floors, and roofs across European construction markets. Closely comparable product technology (PIR) and overlapping specification channels in UK and continental Europe.
• Unilin Insulation: Belgian PIR/XPS insulation manufacturer (part of Unilin Group) selling through builders' merchants and direct to contractors. Overlaps with Celotex on thermal performance boards for cavity walls, floors, and pitched roofs in the UK and Irish markets.
• Kingspan Group: Ireland-headquartered global leader in PIR insulation boards and insulated panels, with the most direct overlap to Celotex's PIR wall/floor/roof product range. Also a named co-respondent in the Grenfell Inquiry, making it the closest comparable on technology, end markets, and regulatory exposure.

Regional players

• Superglass: UK-based glass mineral wool insulation manufacturer with deep UK builders' merchant coverage. Direct competitor to Celotex in the UK cavity wall and pitched roof segments via non-combustible insulation specification.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

• Xx.com/Celotex

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Celotex Group Ltd.