LOCKSMITH & SECURITY ADVICE · REVIEWED 13 NOVEMBER 2026
uPVC and multipoint doors that stick or will not lock
A stiff handle or turning key can involve the door alignment, cylinder or internal mechanism.
Stop forcing it
Do not keep forcing a stiff key or lifting a resistant handle. That can damage the key or mechanism. If the door cannot be secured, explain this when asking for urgent help. If it is secure and usable, arrange a planned assessment.
- Say whether the door is currently open or shut.
- Describe whether the handle lifts, the key turns and the door closes normally.
- If safely visible, note the door and lock branding. Do not dismantle it to obtain details.
Ask for a diagnosis before replacements
A cylinder is only one part of many multipoint systems. Ask whether the problem is alignment, worn handles, the gearbox or the locking strip, and why the proposed repair is suitable.
- Ask whether a compatible part is available or a temporary secure repair is needed.
- Confirm the estimated call-out cost before booking, the repair estimate before starting and any extras first.
- Afterwards, ask to see the door close, lock and reopen normally. Keep the invoice and part details.
Sources & review
Original directory guidance based on the sources below, checked13November2026. It is general information; confirm your own equipment, policy, access rights and circumstances.