Acceptable security devices for minimum security requirements are as follows:
1. Final exit door
A 5 lever mortise deadlock conforming to BS3621, or an equivalent alternative lock approved in advance by us. (If the door is less than 44mm (1.75”) thick, a mortise deadlock is not suitable protection. Refer to us for alternative devices.) Rim automatic deadlocks (such as the Ingersoll SC71) are amongst approved alternative locks.
2. Other external doors
(except sliding doors and double leaf doors). A 5 lever mortise deadlock conforming to BS3621.
Key operated security bolts top and bottom, in addition to any other lock. N.B. Where a 5 lever mortise deadlock is specified for doors, an acceptable alternative is a multipoint locking system with a minimum of three locking points.
3. Sliding doors
a) the manufacturer's lock plus one key operated patio door lock or key operated bolt at the bottom of the door (and at the top if practical to do so).
b) anti-lift devices, and a hook bolt lock conforming to BS3621.
c) a multipoint locking system with a minimum of three locking points. PVC-U doors MUST be fitted with a multipoint locking system with a minimum of three locking points.
4. Double leaf French doors
Two key operated security bolts on each leaf, operating vertically and shooting into the head and sill of the door frame, in addition to any existing lock.
5. All ground floor windows
and other windows accessible without a ladder with dimensions exceeding 9 inches by 9 inches (including fanlights, transoms, pantry windows and the like) should be fitted with key operated window locks or key operated locking handles.
6. Garages and domestic outbuildings
Doors should be secured by a key operated lock or locking system.