Lightweight construction involves the application of a non-structural panel installed on a steel or timber frame.

Utilised for construction cladding, external walls, and intertenancy walls, lightweight construction materials have a range of benefits including energy efficiency, and design flexibility, as well as thermal and acoustic capabilities.

Empower Construction’s founder, Ryan Steyn, began in lightweight construction over 15 years ago. He pioneered the use of lightweight cladding for the entire build, as opposed to just an upstairs feature.

Over a decade ago, he was drawn to its innovation, quick installation, and outstanding performance.

Today, we see lightweight cladding, in different forms, widely used throughout residential construction.

What is lightweight construction?

In lightweight construction, light gauge steel or timber framing provides structural support for the building, while non-structural cladding, made from lightweight building materials like autoclaved aerated concrete (AAC) or polystyrene panels, is attached to the framework.

Why is lightweight construction used? 

Lightweight wall construction is a popular choice for builders in Australia. There are two key reasons for this; cost and time.

Not only do lightweight construction materials reduce the overall load on the foundation, but they’re easier to transport and handle.

This, in turn, reduces labour and construction time.

Costs are further reduced by a simplified installation process, requiring less manual labour than conventional methods.

Secondly, lightweight materials require less heavy machinery for lifting and placement, minimising the need for expensive equipment on-site.

They can be used for retrofitting and renovations, as the reduced load makes it easier to integrate into existing structures.

What are the most popular lightweight building materials?

One of the most popular products is autoclaved aerated concrete.

AAC has been used as a building material in Europe for more than 70 years, and in Australia for over 20 years.

The easiest way to think of AAC is as a big Aero chocolate bar, but substitute chocolate for concrete, lime, gypsum, and sand, and you have a less tasty, but far more durable building solution.

AAC is made by mixing an expanding agent to concrete, causing tiny air bubbles to form. The cement is then cured in a heated environment, and while soft, sliced to size.

The panels or blocks that are formed are steam cured in an autoclave, making them strong and contributing to their much-valued thermal and acoustic capability.

Another popular material is polystyrene cladding. Made from expanded polystyrene (EPS), this material consists of tiny beads of polystyrene that are fused together to create a solid structure.

Polystyrene cladding is highly effective at insulating buildings, keeping heat in during winter and out during summer, and is often used as a protective exterior cladding.

Each type of lightweight construction product offers different features and benefits. Materials are available in different formats, including block and panel forms.

Pros and cons of lightweight construction

This method of building offers a host of advantages, including lightweight design, superior thermal performance, and versatility.

However, factors like the need for skilled installation should be factored into your decision.

Here are some considerations :

Pros :

• Lightweight systems are easier and faster to assemble, saving on labour.
• Prefabricated or modular lightweight elements streamline the building process, allowing homeowners to move in sooner.
• AAC and EPS both offer excellent thermal performance, reducing heating and cooling costs for homeowners.
• Lightweight materials often use less raw material and energy during production, reducing the home’s overall carbon footprint.
• Lighter structures are less susceptible to damage during earthquakes due to reduced loads on the foundation and frame.

Cons :

• Some lower quality lightweight materials may not be as long-lasting as brick or traditional concrete.
• Some homeowners associate heavier materials with better quality and may view lightweight construction as a less robust option.
• AAC, in particular, is strong in compression but weaker in tensile and flexural strength compared to reinforced concrete. It often requires additional structural support for load-bearing applications.
• AAC can absorb water if not properly sealed or maintained. Ensuring proper waterproofing and sealing is crucial in wet or humid climates.
• While installation is faster, lightweight construction requires skilled professionals to ensure proper handling and application. Incorrect installation can compromise its benefits.

Empower Construction has over 15 years of experience managing lightweight building projects across the East Coast of Australia. We are industry experts when it comes to Hebel® and AAC installation.

This knowledge and experience enable us to provide exceptional results for our clients, time and time again.

Ready to embark on your next project with lightweight construction solutions?

Empower Construction is here to guide you every step of the way. Contact us today.