You may also want to consider fitting a sash jammer as extra security to your upvc door which can prevent entry.
Front door security chain alternative.
Defender security u 9913 chain door guard door chain lock for door and home security 3 5 16 solid brass construction and an antique finish 4 5 out of 5 stars 728 9 21.
The opening for the chain on the catch is located away from the door edge making it impossible to detach when the door is open.
The secure ring security door chain.
This is a mortise lock that has an this is a mortise lock that has an adjustable spring loaded hook latch projection for surface mounted sliding patio doors constructed of wood aluminum and vinyl with handle sets with vertical keyway position when in the locked position.
The slide catch should be mounted close to the edge of the door.
An alternative to using a standard door chain is fitting a door chain restrictor with ring which are suitable for upvc and composite doors they will fit any door that has a door lever type handle.
Mounting the slide catch too far from the edge of the door might make it impossible to attach detach the chain.
The alternative view is that as most people just open the door without bothering to view the caller first it is better to open the door on a chain than on nothing at all.
It also fits doors using w f manufactured handles.
Secure ring was designed with the customer in mind and as a result has a number of unique features.
If the caller is up to no good the sight of the occupier putting on a door chain tells the caller that you are very much aware of your security and you won t be an easy target.