Window Handles with Locks: Buying Checklist

Window handles with locks provide a straightforward way to improve security, child safety and ventilation control while maintaining ease of use. This buying checklist outlines the key considerations for homeowners and tradespeople selecting locking window handles, covering lock types, compatibility, testing, installation and maintenance to help make an informed, practical purchase.

Understand lock types and where they’re used

Consider the type of lock mechanism required for the window style and usage. Common options include:

• Espagnolette (espag) handles: Offer multi-point locking when paired with espag gear. Suitable for casement and tilt-and-turn windows where a robust seal and higher security are required. The TSS Cockspur Window Handles is an example designed for strong mechanical engagement.
• Cockspur handles: Simple surface-mounted handles that engage directly with the frame latch. Often used on older or budget casement windows and where minimal hardware alteration is preferred. The TSS Cockspur Window Handle demonstrates a traditional approach suited to certain timber and metal frames.
• Lever-lock handles: Provide a lever action with an integrated lock barrel. Common on uPVC windows and a good balance of convenience and security.
• Night vent or restrictor locks: Designed to allow controlled opening for ventilation while preventing full opening. Ideal for high-level rooms or where child safety is a concern.

Select a lock type that matches the window’s existing locking mechanism or plan for additional parts (espag gear, keeps, backplates) if converting between systems.

Check compatibility and measurements

Precise measurements avoid returns and ensure a clean fit:

• Measure handle centre to centre: For espag handles and some lever-lock types, confirm the screw hole centres. Standard centres include 43mm, 70mm and 85mm, but variations exist.
• Spindle length and diameter: Ensure the spindle fits the gearbox or lock mechanism. Cut spindles to size only when appropriate.
• Fixing screw length: Consider frame thickness and any external trims. Use screws long enough to get a firm engagement without protruding.
• Backset and keep alignment: When replacing a handle, verify the keep or striker on the frame aligns with the latch when closed. Misalignment can prevent locking or cause strain.

Tradespeople should keep a small set of common spindle sizes, screw lengths and adaptors on site for efficient fitting.

Security ratings and materials

Evaluate security features beyond the basic lock:

• Cylinder quality: For lever-locks with cylinders, choose anti-snap, anti-pick and anti-drill certified cylinders where possible.
• Handle construction: Die-cast zinc and stainless steel handles provide better longevity than cheaper plated alternatives. Consider corrosion resistance for coastal properties.
• Internal locking points: Espag systems that operate multiple locking points around the sash significantly increase resistance to forced entry compared with single-point locks.
• Testing standards: Look for handles tested to PAS 24 or equivalent hardware standards when enhanced security is required for compliance or insurance.

Ease of use and accessibility

Handles must balance security with practicality:

• Locking action: Choose locks that are intuitive — single-turn locks may suit elderly occupants, while multi-stage locks offer greater security but require clearer operation.
• Thumbturn or key options: Thumbturns enable quick locking from the inside without a key; keyed options allow windows to be locked from the outside for property management or trades access.
• Handle position and ergonomics: Consider reachability for windows above radiators or behind furniture. Reversible handles suit left- and right-handed openings.

Child safety and ventilation considerations

A locked handle is an opportunity to improve safety:

• Night-vent settings and restrictor plates reduce the risk of falls while permitting fresh air.
• Key-locking handles prevent young children from opening windows unsupervised.
• Use restrictor-compatible handles for rooms used by young children, and ensure maintenance prevents accidental full opening.

Practical installation checklist

A methodical approach prevents common fitment issues: 1. Remove the existing handle and clean the mounting area; check the frame for rot or deformation. 2. Verify that the locking gearbox or espag strip is in good condition; replace if bent or damaged. 3. Transfer measurements precisely (centre distances, spindle lengths) and dry-fit new components before final fixing. 4. Use threadlocker on screws in locations subject to vibration to prevent loosening. 5. Test operation through full travel: open, lock, unlock and close several times to ensure smooth engagement. Adjust keeps if the handle feels stiff or fails to lock easily. Tradespeople should carry spare keeps and adaptors to correct minor misalignments on site.

Maintenance and longevity

Regular servicing extends hardware lifespan and maintains security:

• Lubricate moving parts annually with a silicone-based lubricant; avoid oils that attract dirt.
• Check and tighten screws every six months, especially on frequently used windows.
• Replace worn espag strips or warped keeps promptly to prevent lock failure.
• For coastal or high-moisture areas, inspect for corrosion and use stainless options where possible.

Buying tips and budgeting

Match the product to the window’s life expectancy and intended usage:

• For listed or heritage properties, choose handles sympathetic to the period but with modern locking where possible.
• Prioritise robust materials and tested cylinders for ground-floor windows and large openings.
• Balance cost and durability: cheaper handles may save initially but require replacement sooner.
• Keep a record of handle type, spindle size and centre distance for future replacements.

Window handles with locks are a small but significant upgrade to home security and safety. Choosing the correct type, confirming measurements, and following a practical installation and maintenance routine will deliver long-term reliability.

Window Handles Guide