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An interactive comparison platform for home buyers to evaluate builders, plans, and inclusions in their region side-by-side.

Is steel frame better than timber?

Not necessarily. Both are structurally sound when correctly installed. Steel frames are straighter, termite-proof and don't shrink or warp. Timber is more widely used, easier to modify and typically cheaper.

Does steel framing cost more?

Yes. Steel framing typically costs $8,000–$15,000 more than a comparable timber frame. Some builders offer it as an upgrade option.

Do I need to worry about termites with steel frames?

Steel frames are not susceptible to termite damage. However, the rest of your home (roof, floors, cladding) can still be attacked. A termite management system is still recommended.

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Home›Build Knowledge Hub›Building Process›Frame & Structure›Timber Frame vs Steel Frame

Frame & Structure

Timber Frame vs Steel Frame

The two most common framing systems in Australian new builds — compared on cost, performance, termite resistance and builder availability.

6 min·Compare My Build — Independent Resource· Updated June 2025

Introduction

The wall frames and roof trusses of your new home can be built using either timber or steel. Timber has been the dominant framing material in Australia for decades, but steel frames have grown in popularity — particularly among buyers concerned about termites, movement and long-term performance. Both are widely used and structurally sound when built to standard.

Key Differences

Feature	Timber Frame	Steel Frame
Material	Seasoned or treated structural timber	Cold-formed steel sections (e.g. Truecore®)
Termite resistance	Requires treatment (T2, H2)	Naturally termite-proof
Straightness	Can bow or twist over time	Straighter — better for plumb walls
Thermal bridging	Lower thermal bridging	Higher thermal bridging (requires thermal break)
Modification	Easier to cut and modify	Requires specialist tools
Typical upgrade cost	—	+$8,000 – $15,000
Standard inclusion	Yes (most volume builders)	Upgrade or select builders only

Pros and Cons

Pros

+ Timber is widely available and most builders are experienced with it
+ Steel frames won't be attacked by termites or warp over time
+ Steel frames are straighter — reducing door and window alignment issues
+ Timber is easier to modify during and after construction

Cons

− Timber requires termite treatment and management system
− Steel frames can create thermal bridges — requiring additional insulation
− Steel frame upgrades add $8,000–$15,000 to build cost
− Not all builders offer steel framing as an option

Cost Comparison

Standard timber frame (included in base price)$0 upgrade

T2 treated timber frame upgrade$1,500 – $4,000

Steel frame upgrade (Truecore or equivalent)$8,000 – $15,000

Steel frame pricing varies by builder and home size. Some builders include steel frames as standard — confirm before signing.

Common Builder Inclusions

›Standard timber frames are included in most volume builder base prices
›T2 treated timber is increasingly standard — but confirm in your contract
›Steel frames are usually an upgrade option — not standard
›Some builders (e.g. those marketing steel frame homes) include it as standard

Note

If termite resistance is your priority, a steel frame combined with a physical termite barrier system provides the most comprehensive protection. Ask your builder what termite management is included in the base price.