On 29/01/2011 09:08, rope wrote:
my name is jon i recently fitted a bi fold door between an extension i
just built and the main house the opening was too small for the
orginal size door so i cut the door to fit and hung with 3 hinges and
used a mortice latch and a key lock plus screwed a magnet to the top
to stop it from opening in the middle but the door keeps opening and
the clients want it to b secure has anyone any ideas or advice to stop
it from opening many thanks jon

As others have said, a bi-fold door can be opened, simply by pushing or
pulling in the middle - so a magnet on its own won't prevent it being
opened, even if it stops it from opening by itself.

It seems to me that what you need is the sort of lock which is fitted to
sliding patio doors - which either has a hook or expands sideways to
prevent the door from being slid open. Such a lock should prevent a
bi-fold door from being opened.

Have a look at:
http://www.locksonline.co.uk/acatalo...or_Locks_.html
One of those should provide the necessary level of security.

As far as keeping it closed without locking it is concerned, is there a
top track in which a little roller attached to the top of the remote
leaf moves? If so, there should be a snubber at the far end whose
position needs to be adjusted so that the roller contacts it just before
the door is fully shut. Snapping it shut then compresses the snubber a
bit - pushing the two leaves together where they meet - provided the
hinges are correctly positioned! If the whole lot came in a kit, there
should be some instructions with it!
--
Cheers,
Roger
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