Double Hung Window Locks

Double hung window locks are designed to keep traditional sash-style windows secure without sacrificing ease of use. These locks are made to hold the upper and lower sashes firmly in place, protecting against forced entry while allowing controlled ventilation. Whether you’re upgrading a heritage timber sash window or replacing worn fittings in a modern aluminium frame, Doric’s range of locks offers strength, compliance, and everyday convenience.

With options covering sash window locks, window sash security locks, and double hung sash lock replacements, Doric provides trusted solutions for homes, strata complexes, and commercial properties across Australia.

Types of Double Hung Window Locks

Not all windows need the same type of lock. Doric’s range caters to different materials, safety requirements, and user preferences.

Keyed Sash Window Locks

Keyed locks provide the strongest level of security, making them ideal for ground-floor and street-facing windows. They prevent the sash from being lifted, keeping the window firmly shut when not in use.

Non-Keyed Sliding Sash Locks

Best for internal or upper-level windows, non-keyed locks are quick to operate and simple to maintain. They hold the sash in place but can be released easily for cleaning or ventilation.

Child Safety Locks

For families or strata buildings, child-safety restrictors limit how far a sash can open. This ensures compliance with fall-prevention codes while still allowing airflow.

Replacement Double Hung Sash Locks

Replacement locks are designed to line up with existing cut-outs and screw holes, making it simple to upgrade older fittings without needing to alter the frame.

See Doric’s complete window locks range – All tested to Australian Standards.

Key Features & Benefits

Choosing the right double hung window locks gives you more than just security:

• Strong security – Prevents forced entry by locking the sash in place.
• Controlled ventilation – Secure windows at partial openings without compromising safety.
• Compliance ready – Locks and restrictors tested against Australian Standards.
• Durable finishes – Rust-resistant coatings ideal for coastal and high-humidity areas.
• Easy upgrades – Many models designed for direct replacement into existing sash systems.

Explore timber window locks – Perfect for heritage homes and older sash windows.

Applications

Double hung window locks are widely used across residential and commercial environments:

• Homes – Secure bedrooms, bathrooms, and front-facing sash windows.
• Strata and apartments – Ensure compliance with child safety requirements.
• Commercial properties – Protect offices, shops, and schools with keyed sash security.
• Heritage restorations – Maintain classic timber windows while upgrading safety.

Pair with window limiter hardware or spring balances for smooth sash operation and extra safety.

Compatibility Across Window Types

Doric’s window sash security locks are designed to work with a range of window materials and setups:

• Timber frames – Strong fittings suited to thicker sash profiles.
• Aluminium sashes – Lightweight locks designed to match modern window extrusions.
• uPVC windows – Lock options compatible with insulated profiles.
• Retrofits – Replacement locks sized to match older sash cut-outs.

For added security, match with door cylinders and other fittings for a full property-wide solution.

Maintenance & Replacement Guidance

Even the best sash window locks need upkeep. Regular maintenance keeps them working smoothly:

Maintenance tips:

• Wipe down with a damp cloth to prevent dust build-up.
• Lubricate moving parts with silicone spray twice a year.
• Inspect screws and plates for signs of wear.
• Check child-safety restrictors for correct operation.

Replacement signs:

• Lock no longer holds the sash securely.
• Key mechanism is stiff or jammed.
• Corrosion or rust visible on fittings.
• Sash rattles even when locked.

Doric offers double hung sash lock replacements built for quick swaps, keeping your windows secure with minimal downtime.

Product Spotlights

To help you choose the right lock for your sash windows, here are some of Doric’s standout products:

• DS576 Concealed Wedge Latch – A sleek, concealed latch that locks the sash securely while maintaining a clean finish. Ideal for homeowners who want both security and aesthetics.
• DS324 Cam Press Sash Lock – A heavy-duty cam lock designed for sash windows, offering strong clamping force and reliability in everyday use.
• DT2 Sash Lift – A practical accessory that allows easy lifting and smooth operation of sash windows, pairing perfectly with Doric’s range of locks.

FAQs

What are the best locks for double hung windows?

Keyed sash locks are the most secure option, especially for ground-floor and street-facing windows. For upper floors, non-keyed or restrictor locks often provide the right balance of safety and convenience.

How can I secure my double hung sash windows without replacing them?

Installing sash locks or restrictors directly onto existing frames is usually enough. Doric replacement locks are designed to line up with standard cut-outs, making installation simple.

Are child-safety locks available for sash windows?

Yes. Restrictor systems limit how far the sash can open, preventing accidental falls while meeting compliance requirements.

Do replacement sash locks fit old timber frames?

Yes. Most Doric replacements are designed for both timber and aluminium frames, making them ideal for upgrades in heritage homes.

Can I install double hung window locks myself?

Many models are DIY-friendly, requiring only basic tools. For compliance-heavy installs, particularly in strata, a licensed installer may be required.

Secure Your Double Hung Windows with Doric

Ready to upgrade your window safety? Choose from Doric’s trusted range:

• Shop double hung window locks – Built tough for Australian conditions.
• Get expert advice – Our team can recommend the right lock for your sash windows.
• Call 1300 132 389 – Speak with a Doric hardware specialist today.

All Doric locks are tested to Australian Standards and designed to deliver long-lasting security you can count on.