CLT vs Brick Veneer: A Simpler Comparison for Australian Homes

Most Australian homes are still built using brick veneer. It is familiar, relatively
affordable, and widely accepted by builders, certifiers, and banks.
But high-performance timber construction — particularly Cross Laminated Timber (CLT)
— is starting to change the conversation.

At ArborHaus, we believe the future of
Australian housing will move toward healthier, more energy-efficient, high-performance
homes that combine architectural design with better building science.
This is not a comparison between CLT and concrete skyscrapers.

CLT vs Brick Veneer

The Material Comparison

What is Brick Veneer?

A brick veneer home is not a solid brick house. The structural load is normally carried by a timber or steel frame behind the brickwork. The brick layer mainly acts as external cladding and weather protection.

A typical modern brick veneer wall includes:

• Timber frame
• Bulk insulation batts
• Sarking or wall wrap
• Brick cavity
• External brickwork
• Internal plasterboard lining

A completed wall system like this typically achieves:

• Approx. R2.2–2.5 wall system performance

The brickwork itself has relatively low insulation value

What Is CLT?

Cross Laminated Timber (CLT) is a structural mass timber panel made by laminating layers of timber together at alternating directions.

Instead of building:

• a timber frame
• adding insulation
• adding bracing
• then finally plasterboard

…the CLT panel acts as:

• structure
• bracing
• internal lining
• and part of the thermal envelope

This integrated building approach is a key reason why ArborHaus focuses on CLT and high-performance construction systems for modern Australian homes.

A typical high-performance CLT wall build-up may include:

• 90mm CLT structural panel
• Continuous external insulation (wood fibre or XPS)
• Breathable weather membrane
• Ventilated cavity battens
• External cladding

Depending on insulation thickness, this type of wall system typically achieves:

• Approx. R3.5–4.5 wall system performance

Thermal Performance: The Real Gap

In CLT construction, because the insulation sits continuously on the outside of the structure, thermal bridging is significantly reduced compared to conventional timber framing.

That means:

• more stable internal temperatures,
• reduced heat gain in summer,
• reduced heat loss in winter,
• and lower reliance on heating and cooling systems.

For coastal NSW climates such as Newcastle and Lake Macquarie, this can make a substantial difference to year-round comfort.

All of the homes being developed through ArborHaus are specifically designed around these principles;

Embodied Carbon: Why Brick Veneer Is the Bigger Problem

The carbon comparison between CLT and brick veneer is less often discussed than CLT versus concrete, but it is arguably more important — because brick veneer is the actual default.

Australian brick production requires clay firing at extremely high temperatures, resulting in significant embodied carbon emissions.

CLT stores carbon within the timber itself for the life of the building.

When sourced from responsibly managed plantation timber, CLT can substantially reduce the embodied carbon footprint of a home compared to conventional construction.

Structural Weight and Foundation Consequences

This is the comparison most architects understand but most homeowners have never considered.

A brick veneer wall is not structural — the structural load is carried by a timber or steel frame behind the brickwork. But the brickwork still weighs 180 kg/m². On a 150m² home with 120linear metres of external wall, that is approximately 58 tonnes of dead load added to the structure purely for the cladding material.

CLT wall panels carry the structural load themselves and weigh 70 kg/m². On the same home, that is approximately 22 tonnes — a difference of 36 tonnes of dead load.

Typical wall weights:

• Brick veneer wall: approximately 180–220 kg/m²
• 90mm CLT wall panel: approximately 45–55 kg/m²

Even after adding insulation, battens, and cladding, a CLT wall system is often significantly lighter than brick veneer construction.

This can reduce:

• footing sizes,
• excavation requirements,
• and foundation costs,

particularly on:

• reactive soil,
• sloping sites,
• and coastal ground conditions.

Build Speed

Brick veneer construction is labour intensive and weather dependent. CLT panels arrive prefabricated and are installed by crane. A structural CLT shell can often be installed in days rather than weeks, allowing following trades to begin earlier and reducing overall build time.

Where Brick Veneer Still Wins

We are a CLT builder. We are going to tell you honestly where brick veneer outperforms our product.

Upfront material cost.

Brick veneer is cheaper at the structural material stage. Volume builders can source standard brick at $95/m², including coursing labour. There is no equivalent commodity price point for CLT panels.

Thermal mass in Zone 2.

In subtropical Queensland and northern NSW, where summer cooling loads dominate and diurnal temperature swing is lower, the thermal flywheel of brick veneer provides modest but measurable benefit. CLT with correct passive design can compensate, but brick veneer holds a natural advantage in highhumidity, low-swing thermal environments.

Familiarity with certifiers and insurers.

Brick veneer has 60 years of NCC precedent. CLT has 15years of Australian regulatory history. Most residential building certifiers are familiar with both, but for complex or non-standard projects, brick veneer involves less documentation overhead.

The Bigger Question

Across the metrics most relevant to an Australian residential build in Climate Zones 4–6 —thermal performance, structural e:iciency, embodied carbon, build speed, and whole-of-life cost — CLT outperforms brick veneer on every measure except upfront material price. The question is not whether CLT is a better material. It is whether the additional upfront investment is worth the long-term comfort, performance, speed, and sustainability benefits. For many architecturally designed homes and high-performance residential projects, the answer is increasingly becoming yes.

Frequently Asked Questions

Can I specify CLT on a knockdown-rebuild site that currently has a brick veneer home?

Yes. CLT is appropriate for infill, knockdown-rebuild, and new land builds. The lighter structure is particularly advantageous on infill sites with shared boundary conditions, where reduced dead load simplifies footing design near property lines.

How does CLT look compared to brick veneer from the outside?

Very di:erent. CLT does not present as a masonry external finish — it is cladded in an external material such as charred timber, spotted gum, fibre cement, or corrugated steel. The internal face, where exposed, reads as a warm, smooth timber surface. If you are seeking a masonry exterior aesthetic, CLT with rendered or cladded panels can achieve that outcome, though it adds cost.

Does CLT require more maintenance than brick veneer?

The CLT structural panel requires no maintenance. The external cladding material determines the maintenance schedule. Charred cypress in coastal conditions requires re-oiling every 36–48 months. Painted fibre cement requires repainting every 7–10 years. Brick veneer with painted mortar requires repointing and painting on a comparable cycle. Maintenance requirements are cladding-specific, not structure-specific.