What Doublejack Construction does

Doublejack Construction (Pty) Ltd is a South African specialist contractor in roof sheeting and cladding, founded in 1970 and headquartered in Gauteng. The company supplies and installs roofing systems for commercial, industrial, mining, construction, and energy-sector clients across South Africa, with a product range that includes concealed-fix roofing, polycarbonate sheeting, bullnosed sheeting, and Chromadek/Zincalume sheeting. Its business model combines two revenue streams: the supply of roofing materials and the provision of installation labour services, the latter being a meaningful differentiator versus pure materials suppliers. The company is family-owned (currently under Mrs. Lesley Knight, having transitioned from M.G. Knight who held sole proprietorship from 2001) and operates with a small workforce of 11-50 employees.

The company's commercial positioning is built on a multi-decade track record with blue-chip counterparties, including Sasol, Glencore, Anglo Coal, Impala Platinum, Kumba, Seriti, Foskor, BECA, Murray and Roberts, and Group Five. It maintains industry-body memberships and compliance registrations with SAMCRA (South African Metal Cladding and Roofing Association), NEASA (National Employers' Association of South Africa), MEIBC (Metal and Engineering Industries Bargaining Council), and Workman's Compensation, and holds BBBEE Level 2 status with 135% recognition. These credentials are material in the South African procurement environment, particularly for mining and state-owned enterprise tenders. The business is structurally a small specialist contractor rather than a scaled platform; its competitive position rests on installation expertise, safety compliance, and incumbency on repeat industrial projects rather than technology, scale economics, or geographic breadth. No evidence of M&A activity, external funding, geographic expansion beyond South Africa, or digital/AI-enabled operations was identified.

Name

Doublejack Construction

Legal name

Doublejack Construction (Pty) Ltd

Website

https://doublejackconstruction.co.za

Company type

Private

Founded year

1970

Operating status

Operating

Headcount range

11–50 employees

Short description

Doublejack Construction is a Gauteng-based South African specialist contractor supplying and installing roof sheeting and cladding for commercial, industrial, mining, and energy-sector clients, founded in 1970 and family-owned.

Ownership category

akta.pro rank

Product category

Industrial Roofing Services

NAICS

Roofing Contractors (23816), Roofing Contractors (238160), Sheet Metal Work Manufacturing (332322)

SIC

Sheet Metal Work (3444)

akta.pro primary industry

Sheet Metal & Flashing Works (Gutters, Copings, Edge Metal, Downspouts) (IMAFAMAE)

akta.pro secondary industries

Flashing, Edge Metal & Roof Accessories (IMADAFAJ), Roof Installation & Replacement (HSAPAKAA)

Keywords

• Roof sheeting installation
• Industrial cladding services
• Metal roofing profiles
• Polycarbonate sheeting
• Commercial roofing contractor

Headquarters

HQ city

Gauteng

HQ country

South Africa

HQ region

Africa

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales

Revenue model

1. Roofing Materials Supply: Supply and delivery of all related roofing materials including metal sheeting profiles, polycarbonate sheeting, flashings, ventilators, louvers, and rainwater goods.
2. Installation Labour Services: Highly qualified and safety conscious labour for the erection of roof sheeting, cladding and components with professional installation services.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Doublejack Construction (Pty) Ltd supplies roofing materials — including metal and polycarbonate sheeting profiles, flashings, ventilators, louvers, rainwater goods, and insulation — and provides qualified, safety-conscious labour for the erection of roof sheeting, cladding, and components on commercial and industrial buildings. The company also fabricates specialized bull-nosed, curved and center cranked sheets and installs permanent formwork (QC Flooring) for industrial concrete floors.

Product overview

Doublejack Construction is a Roof Sheeting and Cladding Specialist Company serving the Commercial and Industrial Industry. The company offers a comprehensive portfolio of roofing and cladding products including Metal Sheeting Profiles, Polycarbonate Sheeting Profiles, Bullnosed Sheeting, Flashings, Ventilators, Louvers, Rainwater Goods, and Insulation. Additional specialized products include roof, conveyor, silo, side and gable sheeting, bull-noses and curved sheets, and permanent form work (QC Flooring). The company also provides installation services with qualified labor for the erection of roof sheeting, cladding and components, along with professional drawings and accurate schedules.

Differentiator

Problem solved

Functional benefit

Products and services

• Metal Sheeting Profiles Metal sheeting profiles supplied for roofing and cladding applications in commercial and industrial settings.
• Polycarbonate Sheeting Profiles Polycarbonate sheeting profiles providing durable roofing solutions with light transmission properties for industrial buildings.
• Bullnosed Sheeting Bull-nosed sheeting profiles for curved roofing applications in commercial and industrial buildings.
• Flashings Flashing components supplied for weatherproofing and sealing roof joints and edges.
• Ventilators Roof ventilators for air circulation and ventilation in industrial buildings.
• Louvers Louver systems for ventilation and air-flow management in roofing applications.
• Rainwater Goods Rainwater collection and drainage systems, including gutters and downpipes, for industrial roofing.
• Insulation Roof insulation materials supplied for thermal management in commercial and industrial buildings.
• Bull-Noses, Curved and Center Cranked Sheets Specialized curved and cranked sheet profiles for architectural roofing designs and custom applications in industrial and commercial buildings.
• Roof, Conveyor, Silo, Side & Gable Sheeting Comprehensive range of sheeting solutions supplied for various industrial applications, including roofs, conveyors, silos, and building walls.
• Permanent Form Work (QC Flooring) Permanent formwork system supplied and installed for quality concrete flooring construction in industrial facilities.
• Roof Sheeting and Cladding Installation Services Provision of highly qualified and safety-conscious labour for the erection of roof sheeting, cladding, and components on commercial and industrial projects, delivered together with professional drawings, accurate schedules and trained staff.

Named customers16 records

Segments2 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Six partnerships are on record, tiered minor and core.

• NEASA (National Employers' Association of South Africa)minorOthersMembership in NEASA provides industry representation and labour relations support. NEASA is a registered employers' organization serving the construction and engineering sectors.
• MEIBC (Metal and Engineering Industries Bargaining Council)minorOthersBargaining council membership for the metal and engineering industries, providing labour relations framework and industrial council support.
• SAMCRA (South African Metal and Cladding Roofing Association)coreOthersIndustry association membership demonstrating specialization and adherence to industry standards in the metal cladding and roofing sector.
• Workman's Compensation FundminorOthersRegistered with the Workman's Compensation Fund for employee injury and occupational disease coverage, demonstrating compliance with South African labour regulations.
• Credit GuaranteeminorOthersCredit insurance partner providing protection against non-payment by customers, supporting business operations and risk management.
• SASRIAminorOthersSpecialist risk insurer covering political, violent, and terrorism-related damage to property, important for South African industrial operations.

Scale indicators2 records

Recent moves5 records

Expansion highlights3 records

Direct peers

• Brownbuilt Metal Roofing: South African metal roofing profile manufacturer and supplier for commercial and industrial buildings. Directly comparable product portfolio (IBR-type profiles, flashings) and serves overlapping industrial customer base.
• Clotan Steel: South African steel roofing and cladding manufacturer producing profiles, flashings, and allied roofing components. Overlaps with Doublejack's materials supply and installation offerings in the commercial and industrial roofing market.
• Safintra South Africa: Major South African manufacturer and supplier of metal roofing and cladding profiles, also active in installation. Competes directly with Doublejack in the commercial and industrial roof sheeting segment across mining and industrial customers.
• Pro Roof Steel Merchants: South African merchant and installer of metal roofing profiles and accessories serving commercial, industrial and residential clients. Directly comparable in product mix (profiles, flashings, rainwater goods) and customer verticals.
• Global Roofing Solutions (GRS): South African metal roofing, cladding and rainwater goods manufacturer and installer serving commercial, industrial and mining clients. Directly comparable in product portfolio, customer verticals, and bundled supply-plus-install business model.
• Roofing Industries: South African roll-forming and metal roofing manufacturer supplying profiles, flashings, and rainwater goods with installation capability. Closely comparable to Doublejack's sheeting profiles, flashings, and rainwater goods offering.

Emerging players

• Discovery Roofing: Smaller South African roofing contractor focused on commercial and industrial sheeting and cladding installation. Comparable service offering to Doublejack's installation labour stream but at smaller scale.

Broad incumbents

• Kwikot: South African manufacturer of hot water systems, rainwater goods (gutters, downpipes) and related building products. Overlaps with Doublejack's rainwater goods product line and serves the same residential and commercial roofing channel.
• Fielders Steel Roofing (BlueScope): Multi-national steel and coated steel products group with a South African roofing profile and cladding presence. Competes with Doublejack in metal roofing for commercial and industrial buildings as a broad incumbent.
• Macsteel: Largest steel merchant and processor in Africa, supplying roofing and cladding feedstock into the SA market. Competes with Doublejack indirectly as a scaled upstream supplier and as a broader incumbent in metal building products.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/doublejackconstruction
• LinkedInlinkedin.com/company/doublejack-construction-pty-ltd

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Doublejack Construction