What Isowall Group does

Isowall Group (Pty) Ltd is a privately held South African manufacturer and installer of insulated sandwich panels and expanded polystyrene (EPS) and expanded polypropylene (EPP) products, operating from a 45,000 square metre facility in Silverton, Pretoria with approximately 300 employees. Founded in 1973 and purchased by Peter van Duyn in 1982, the company has grown into the dominant polystyrene and panel manufacturer in South Africa and the leader in structural insulated panels in Africa. Its core product line centres on Isowall Sandwich Panels built with EPS, EPP, or Rockwool cores bonded between pre-stressed skins, complemented by Isolite block moulded EPS (since 1985), Isolite shape moulded EPS (since 1992), Isolite shape moulded EPP (as a JSP ARPRO approved moulder), and Isowood, Isocornice, and Hebcooler sub-brands for interior solutions and food-grade packaging. A vertically integrated light engineering workshop, drawing office, and toolroom enable custom mould and accessory production.

The company serves B2B customers across cold storage, commercial and industrial construction, automotive, food and beverage, pharmaceutical, and agricultural end markets, with specification-led sales to architects, contractors, developers, and OEMs, plus a factory shop for smaller direct purchases. Revenue is generated primarily through one-time project-based sales at quote-based pricing tailored to specifications and volumes, supported by long-term specification relationships and partnerships such as JSP ARPRO, EPSASA, and other industry associations. Growth Capital Partners invested in March 2020 alongside retained executive leadership (CEO Debbie van Duyn), positioning the company for continued capital-led expansion while maintaining its family-ownership roots. The firm is ISO 9001:2015 and ISO 14001:2015 certified, operates a Zero Waste to Landfill Initiative, and markets itself as the supplier of choice across Africa for its product categories.

Name

Isowall Group

Legal name

Isowall Group (Pty) Ltd

Website

https://isowall.co.za

Company type

Private

Founded year

1973

Operating status

Operating

Headcount range

251–500 employees

Short description

Isowall Group is a South African manufacturer and installer of insulated sandwich panels, EPS and EPP products, serving cold storage, construction, automotive, food and beverage, and pharmaceutical customers across Africa.

Ownership category

akta.pro rank

Product category

Insulated Building Materials

NAICS

Polystyrene Foam Product Manufacturing (32614), Urethane and Other Foam Product (except Polystyrene) Manufacturing (326150), Veneer, Plywood, and Engineered Wood Product Manufacturing (3212)

SIC

Plastics Foam Products (3086), Millwood, Veneer, Plywood, & Structural Wood Members (2430)

akta.pro primary industry

Structural Insulated Panels (SIP) & Foam-Core Composite Panel Manufacturing (IMANAIAK)

akta.pro secondary industries

Polymer Foams & Cellular Materials (PU Foams, EPS/XPS, Structural Foams) (IMAEANAL), Foam Plastic Insulation (EPS/XPS/PIR/PUR) (IMADAGAD), Sandwich Panels & Core Materials (Foam, Balsa, Honeycomb) (IMAJAKAD)

Keywords

• Insulated sandwich panels
• Expanded polystyrene manufacturing
• Cold storage construction
• Structural insulated panels
• Lightweight foam products

Headquarters

HQ city

Pretoria

HQ country

South Africa

HQ region

Africa

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Isowall Sandwich Panels Manufacturing and Installation: Manufacture and installation of structural insulated sandwich panels for cold storage, commercial, industrial, and residential buildings. The panels are sold with various core options (EPS, EPP, Rockwool) and finishes.
2. Isolite EPS and EPP Products: Manufacturing and distribution of block moulded EPS (since 1985), shape moulded EPS (since 1992), and shape moulded EPP products. Used for insulation, lightweight fillers, and semi-rigid cushioning across construction, packaging, and automotive industries.
3. Interior Solutions: Manufacturing and distribution of interior products including Isocornice decorative cornices, Isowood skirting boards and dado rails, and ceiling roses. Made from recycled EPS materials.
4. Hebcooler EPS Cups and Tubs: Manufacturing and distribution of EPS cups and tubs for food and beverage industry. Hebcooler range is 100% recyclable.
5. Light Engineering Products: Manufacturing and distribution of panel accessories including flashings, goal posts, crash barriers, door thresholds, PVC strip curtains, traffic door systems, bollards, louvres, doors and window frames. Both for internal use and client specification.
6. Cold Room Accessories and Systems: Supply and installation of traffic door systems, PVC curtains, bollards, crash barriers and goalposts for cold rooms, refrigerator units, freezers and warehouses.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Isowall Group manufactures and installs structural insulated sandwich panels (with EPS, EPP, or Rockwool cores), produces Isolite block moulded EPS, shape moulded EPS, and shape moulded EPP foam products, and supplies interior solutions (decorative cornices, skirting boards, dado rails, ceiling roses) along with EPS cups and tubs for food and beverage applications. The company also fabricates panel accessories through in-house light engineering and produces its own moulds via an in-house toolroom.

Product overview

Isowall Group operates as a diversified manufacturer and installer of insulated building products across South Africa since 1973. The portfolio consists of five interconnected product lines: (1) Isowall Sandwich Panels as the core structural insulated panel offering for cold storage, commercial, and industrial applications; (2) Isolite branded EPS and EPP products encompassing block moulded EPS, shape moulded EPS, and shape moulded EPP for insulation, packaging, and automotive applications; (3) Interior Solutions including Isocornice decorative cornices, Isowood skirting boards and dado rails, and ceiling roses made from recycled EPS; (4) Hebcooler EPS cups and tubs for food storage; and (5) supporting Light Engineering, Drawing Office, and Toolroom services for panel accessories, custom design, and mould manufacturing.

Differentiator

Problem solved

Functional benefit

Brands

• Isolite: Brand for expanded polystyrene (EPS) and expanded polypropylene (EPP) products including block moulded EPS, shape moulded EPS, and shape moulded EPP for insulation, packaging, and cushioning applications.
• Hebcooler
• Isocornice
• Isowood
• Isolam

Products and services

• Isowall Sandwich Panels Structural insulated sandwich panels with a thermally efficient insulation core (EPS, EPP, or Rockwool) sandwiched between two outer pre-stressed skins, available in multiple finishes and iterations for cold storage, commercial, industrial, and residential applications.
• Isolite Block Moulded EPS Block moulded expanded polystyrene manufactured in standard sheets and cut to any 2D shape on order, used for large-volume insulation sheets, low-volume packaging pieces, architectural applications, and pipe and tank lagging.
• Isolite Shape Moulded EPS Shape moulded expanded polystyrene manufactured using customised moulds, ideal for 3D shapes and high-volume products, used for insulation, lightweight filter, and semi-rigid cushioning applications.
• Isolite Shape Moulded EPP Shape moulded expanded polypropylene foam products for automotive, packaging, and HVAC industries, offering high strength-to-weight ratio, thermal insulation, and impact resistance as a JSP ARPRO approved moulder.
• Isocornice Decorative Cornice Range Decorative cornices for interior applications, used to mask finished top edges where walls meet ceilings in residential, commercial, and architectural finishing applications.
• Isowood Skirting Boards and Dado Rails Interior moulding products manufactured from recycled EPS, providing 3-metre length standard skirting boards and dado rails that are waterproof, easy to install, recyclable, and able to conceal cables and electrical wiring.
• Ceiling Roses Decorative interior ceiling elements used in architectural finishing applications as part of Isowall's Interior Solutions range.
• Hebcooler EPS Cups and Tubs EPS cups, tubs, and lids for food and beverage applications, manufactured as 100% recyclable products under the Isolite brand for temperature maintenance and hygiene.
• Isostick Insulated concrete formers (EPS blocks) used to create reinforced concrete walls, acting as a thermal and moisture barrier in insulated building construction.
• Light Engineering Panel Accessories Manufactured panel accessories including flashings, goal posts, crash barriers, door thresholds, PVC strip curtains, traffic door systems, bollards, louvres, doors and window frames, available for internal use and client specification.

Quantifiable outcome

• Building rates of 50m² per day per building team are achievable using EPS blocks, five times faster than traditional brick construction
• +3 more outcomes

Named customers6 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• JSP (ARPRO)coreStrategic or Co-development PartnerIsowall is a JSP ARPRO approved moulder, manufacturing and supplying Isolite Shape Moulded EPP products to the automotive sector. ARPRO is a high-quality expanded polypropylene material.
• Expanded Polystyrene Association of South Africa (EPSASA)coreOthersIsowall is a founding member of the Expanded Polystyrene Association of South Africa (EPSASA), which represents the polystyrene industry and promotes responsible manufacturing and recycling.
• Polystyrene Association of South Africa (PASA)minorOthersIsowall is a member of the Polystyrene Association of South Africa (PASA), which represents major players in the local polystyrene manufacturing industry and assists in finding end-markets for recycled polystyrene.
• Plastics SAminorOthersIsowall is a member of Plastics SA, which represents the plastics industry in South Africa and advocates for sustainable plastics and responsible waste management.
• SAPOA (South African Property Owners Association)minorOthersIsowall participates in SAPOA as part of its industry involvement and commitment to the property and construction sector in South Africa.
• TPMA (Thermal Insulation Products Manufacturers Association)minorOthersIsowall participates in TPMA, the Thermal Insulation Products Manufacturers Association, as part of its industry involvement.
• MBA NorthminorOthersIsowall participates in MBA North as part of its industry involvement in the construction and building sector.

Scale indicators8 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Rockwool International: Global leader in mineral-wool (stone wool) insulation products used as panel cores and standalone insulation. Rockwool is directly comparable to Isowall's Rockwool-core sandwich panel offering and broader insulation portfolio.
• Trimo: European manufacturer of mineral-wool and PIR-core sandwich panels for façades and roofing. Trimo is a directly comparable sandwich-panel producer targeting industrial and commercial buildings similar to Isowall's core sandwich-panel line.
• JSP Corporation: Global EPP (ARPRO) manufacturer and Isowall's technology partner for automotive-grade expanded polypropylene. JSP is a direct peer in shape-moulded EPP products for automotive, packaging, and HVAC applications, and serves as Isowall's approved-moulder certification body.
• Isocab: Belgian manufacturer of insulated sandwich panels for industrial, commercial, and cold-storage applications. Isocab is a direct sandwich-panel peer with overlapping product positioning in cold-chain and building envelope solutions.
• Epsilyte: North-American EPS foam producer supplying block and shape-moulded expanded polystyrene for insulation, packaging, and construction. Epsilyte is a direct peer to Isowall's Isolite EPS product family across insulation and packaging end-uses.
• Kingspan Group: Global leader in insulated panels and building envelopes with a comparable sandwich-panel portfolio (QuadCore, IPN, etc.). Kingspan is the most relevant direct peer to Isowall, competing across cold-storage, commercial, and industrial insulated-panel applications.
• Metecno: Global sandwich-panel manufacturer with presence in multiple continents including Africa. Metecno competes directly with Isowall in PIR/EPS/mineral-wool insulated panels for cold-storage and industrial buildings.

Broad incumbents

• Knauf Insulation: Major global insulation manufacturer offering mineral wool, EPS, and other thermal/acoustic insulation products. Knauf is a broad incumbent peer competing in the same insulation category as Isowall's panel cores and standalone insulation.
• Atlas Roofing Corporation: Manufacturer of insulation, roofing, and wall systems including polyiso and EPS foam boards used in commercial construction. Atlas is a broad incumbent peer to Isowall on insulation boards and building-envelope components.
• Saint-Gobain: Global building materials giant with a deep insulation portfolio (Isover, etc.) and broader construction-product breadth. Saint-Gobain is a broad incumbent overlapping with Isowall on insulation materials but at much wider scale and across many product categories.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key highlights7 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

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 Isowall Group