Security restrictors are designed for people who want to add an extra layer of protection to windows and doors that are at higher risk of forced entry—such as rear access doors, ground-floor windows, or any openings easily reached from outside.

These devices don’t just limit window or door movement—they're built to deter burglars, delay intrusion attempts, and give you added peace of mind.

Common Risk Areas

Typical locations that benefit from added security restrictors include:

• Back doors or patio entrances

• Basement or ground-floor windows

• French doors and sliding glass doors

• Garage side doors or utility access points

Types of Security Restrictors

We’ve grouped the best options based on the type of door or window you're looking to secure:

Sash Jammers

These are surface-mounted devices that physically reinforce the window or door frame.

Ideal for low-level uPVC windows and doors

Easy to install

Can be locked in place manually to resist forced entry

Patlocks

Purpose-built for French doors, these secure both handles together internally.

Stops external access even if the main lock is compromised

Easy to install and remove

Provides a visible security deterrent

Sliding Patio Door Bolts

These restrictors prevent sliding doors from being lifted or forced open.

Suitable for traditional sliding patio doors

Can also be used on vertically sliding sash windows

Often include a secondary lock for added strength

Before choosing your security restrictor, ask yourself:

Do I understand the installation process for this type of restrictor?

Am I confident in installing it myself, or should I hire a professional?

Links to options below