Thinking of Buying a Windows and Doors Business in Australia? Here Are 3 Vital Questions to Ask

Australia’s aluminium windows and doors sector generates $5.03 billion in annual revenue, supported by 1,593 enterprises and employing 16,817 people nationwide.

Average profit margins sit at 7.2 percent, influenced by volatile aluminium prices, heavy import competition, and fluctuating construction activity. Revenue is forecast to grow 1.45 percent annually through 2031, driven by energy efficient building demand, sustainability upgrades and public infrastructure commitments.

Despite recent contraction, manufacturers focusing on high performance, thermally efficient, and architecturally specialised products continue to achieve stronger margins and more resilient demand.

1. Is the Business Financially Resilient in a Volatile Cost Environment?

Why It Matters:

The industry is heavily exposed to global aluminium price swings, supply chain disruptions and rising energy costs. Smaller operators often struggle to absorb these fluctuations and face pressure from price sensitive builders and large importers.

Purchase costs represent the industry’s largest expense, often exceeding 50 percent of revenue, while labour remains significant due to the manual fabrication required. Energy costs, transport, and rent compound the challenge for less automated manufacturers.

What to Check:

• Exposure to aluminium price volatility and whether the business uses recycled aluminium or long term supply contracts.

• Profit margins compared with the 7.2 percent industry benchmark.

• Cost structure breakdown, including wages, utilities, materials and logistics.

• Investment in automation or lean manufacturing processes to reduce labour intensity.

• Whether the business can pass on cost increases to customers or is constrained by fixed price contracts.

2. How Competitive Is the Business Against Imports and Large National Players?

Why It Matters:

Import penetration is rising quickly. Low cost aluminium windows and doors from China dominate the low end of the market due to subsidies, lower labour costs and scale efficiencies.

Domestic manufacturers remain highly fragmented, with most generating under $2 million in annual revenue. Larger players like Capral (8.4 percent market share), G James (5 percent) and Platinum Equity backed JELD WEN (3.6 percent) increasingly influence pricing and supply to major builders.

What to Check:

• Customer concentration across residential, commercial and industrial construction.

• Whether the business supplies high margin commercial, custom or thermally broken systems where import competition is weaker.

• Existing relationships with major builders or installers that provide recurring work.

• Geographic advantage, noting most manufacturers cluster on the east coast near construction hubs.

• Product differentiation, such as advanced glazing systems, bi fold units or custom architectural frames.

3. Is the Business Positioned for Sustainability, Technology and Regulatory Change?

Why It Matters:

Demand is shifting quickly toward high performance, energy efficient products. The National Construction Code requires better insulation and thermal performance, leading builders to favour advanced window and door systems over basic aluminium frames.

Manufacturers investing in recycled aluminium, polyamide thermal break technology, and automated production processes are outperforming traditional competitors.

What to Check:

• Use of thermal break technology and energy efficient designs aligned with new NCC requirements.

• Capability to service commercial projects prioritising Green Star ratings.

• Adoption of advanced equipment such as CNC cutting, robotic assembly and precision extrusion.

• R&D focus on sustainability, product innovation or noise reduction.

• Compliance with environmental regulations around waste disposal, emissions and hazardous materials.

Ready to Invest in a Thriving Windows and Doors Business?

With energy efficiency, sustainable construction and commercial development driving new demand, windows and doors businesses continue to offer strong long term potential.

Success depends on cost control, technological capability, strong builder relationships and the ability to differentiate from low cost imports with high value, performance driven products.

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