Door Locks

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What type of lock do I need?

This depends on where you’re using it and which type of handle you have. For a sprung lever handle, a standard sash lock will suffice, but for our unsprung lever handles, you’ll need a heavy-duty sash lock to help return the lever to its horizontal position. On bathroom doors with a sprung lever handle, a standard lock should be suitable, and for bathroom doors with an unsprung lever handle, a heavy-duty bathroom look will be required. Either a standard or heavy-duty bathroom lock should be suitable for a knob set and thumbturn on a bathroom door. For external doors with a centre door knob or cylinder pull, a stand-alone deadlock can be used.

What size lock do I need?

This depends on which door furniture you’re planning to use. With a lever handle, a 2.5” or 3” lock should be suitable. However, if you’re using a door knob, we recommend using a lock that’s 3” or bigger to ensure the knob is positioned far enough away from the edge of the door frame. If you use too small a lock, you risk catching your knuckles on the edge of the door when trying to turn the knob.

What’s the difference between a standard and heavy-duty lock?

The only difference is the strength of the spring contained within the mechanism. Standard locks have a standard spring which is suitable for sprung lever handles/knobs. Heavy-duty locks have a much stronger spring which gives them the strength required to return an unsprung lever handle or door knob to its original position.