Timber Sash Windows

Why choose timber sash windows?

For many Australian homeowners, architects and builders, timber remains the benchmark for authenticity, insulation and repairability. A well-made sash window in durable hardwood can outperform modern alternatives for decades, while offering a warmth aluminium simply can’t replicate.

• Naturally insulating: Dense timber reduces heat transfer, aiding NCC energy targets—especially when paired with double glazing.
• Heritage compliance: Many conservation areas mandate timber frames to preserve original streetscapes.
• Ease of repair: From swapping timber sash window locks to refitting sashes, individual components can be serviced without replacing the whole unit.

Key styles available on ArchiPro

1. New timber sash windows

Ideal for extensions or new builds seeking traditional lines with modern performance. Look for options factory-sealed with low-VOC finishes and rated BAL-29 or higher for bushfire-prone zones.

2. Replacement timber sash windows

Supplied as insert frames or full box replacements, these units make light work of upgrading draughty, painted-shut originals while preserving the façade.

3. Double glazed timber sash windows

Combine classic looks with outstanding acoustic and thermal values. Many suppliers now offer argon-filled units meeting ABCB energy provisions.

Cost factors to expect

Timber sash window cost depends on size, glazing package, timber species and hardware. As a guide:

• Standard single-glazed 600 × 1200 mm: $900–$1,300
• Double-glazed upgrade: +25–35%
• Custom arch or bay assemblies: Price on application

Remember to budget for installation, priming/painting and any timber sash window repairs to surrounding frames.

Specification checklist

Before sending plans to suppliers, confirm:

• Frame depth to suit cladding and cavity
• Glazing type (single, double, acoustic, laminated)
• Hardware finish and child-safe restrictors
• Ventilation requirement—traditional cords & weights or concealed spring balances
• BAL, acoustic or cyclone ratings specific to your site

Installation & maintenance tips

Correct installation is critical. Frames must be plumb, square and sealed on all sides with flashing tape. Post-fit, apply breathable exterior paint or stain and re-coat every 3–5 years in harsh coastal zones. Lubricate pulleys annually and keep weep holes clear to prevent swelling.

When to repair vs replace

Minor issues such as flaking paint, stiff movement or broken cords are usually cost-effective to remedy. Engage a specialist in timber sash window repairs Melbourne, Sydney or Brisbane if you spot:

• Rot covering less than 10% of the frame
• Loose glazing putty
• Air-seal failures at the meeting rail

Extensive rot, warped sashes or recurring condensation inside double glazing often signal the time for full timber sash window replacement.

Explore related window solutions

Looking for other opening styles? View our full range of windows or compare:

• skylights and roof windows for natural top-light
• window mouldings to match period details
• awning windows offering weather-proof ventilation
• bifold windows for seamless indoor-outdoor flow
• casement windows with unobstructed views
• sliding windows suited to tight footprints
• louvre windows for fine-tuned airflow
• security window grilles to boost safety
• tilt and turn windows delivering European versatility

Ready to compare quotes? Explore our curated range of timber sash windows from Australia’s most respected manufacturers and bring enduring character to your next project.