You want the bottom-line ? Garages aren't very secure. (Not unless you spend a lot of cash on very expensive doors anyway.) If someone wants to get in... they will.
Q: How secure is a door fitted with an electric motor ?
A: Depends on the type of door that you have. Fitting a
motor means that you usually
have to remove the existing locks unless an Automatic Security Locking System is
fitted (not compatible with canopy doors).
Retractable
Canopy
Side Hinged
Retractable
One latch:
If your door has a single latch at
the centre of the top of the door then there will be an improvement in security
with
an operator fitted. It is fairly straightforward to spring garage door
latches whereas over-coming the gearing of a motor is very difficult.
Two latches:
With the latch on either side of your door removed it is possible, with some
force, to lever the
bottom of retractable doors ajar. Your retractable door can either
be fitted with an Automatic Security Locking System and/or an
Automatic Bottom
Locking Kit. These items are by no means essential, many customers do not feel
the need to use them.
Canopy
One latch:
If your door has a single latch at
the center of the top of the door then there will be an improvement in security
with
an operator fitted. It is fairly straightforward to spring garage door
latches whereas over-coming the gearing of a motor is very difficult.
Two latches:
If your canopy door has a latch
either side and doesn't have roller seats then security will be
reduced, however, the very 'canopy' design of the door prevents easy leverage at
the base of the door. Unfortunately there are no additional security
options that can be fitted to canopy doors.
Side Hinged
Side hinge doors are again only held closed at the top of the door so any
warpage in wooden doors will show itself at gaps lower down. An Automatic
Bottom Locking Kit can be fitted if desired to add a little extra security.