How and where to use guide
1188765 VELUX T-22 LOCK
Primary function
The T-22 lock secures the window sash to the frame when closed. It prevents the window from opening unintentionally and contributes to the overall weather seal of the installation. A functioning lock is necessary for safe operation and to maintain the integrity of the roof penetration.
- Secures the window sash in the closed position
- Prevents accidental opening at height
- Maintains weather-tightness when engaged
Typical applications
VELUX roof windows are commonly installed in loft conversions, attic spaces, and upper-storey rooms. The T-22 lock is used wherever VELUX windows are fitted, including domestic properties, commercial buildings, and industrial structures with roof access.
- Loft conversions and attic rooms
- Upper-floor residential windows
- Commercial and industrial roof installations
Maintenance and operation
Keep the lock mechanism clean and free from debris. Operate the lock smoothly without forcing; if resistance develops, clean the mechanism rather than applying excessive force. Periodic inspection ensures the lock remains functional and secure.
- Clean the lock and frame regularly to prevent dirt accumulation
- Operate smoothly; do not force the mechanism
- Inspect periodically for signs of wear or damage
When to replace
Replace the T-22 lock if it becomes difficult to operate, fails to hold the window securely, or shows visible damage. A faulty lock compromises both security and weather protection, so replacement should not be delayed.
- Lock is stiff or difficult to engage
- Window does not remain securely closed
- Visible cracks or damage to the lock body