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©Jakub Krechowicz – stock.adobe.com Modern window systems are characterised by
resistance class RC 2 as standard. Picture/table:
©Salamander Industrie-Produkte | sip-windows.com

Resistance
classes Method adopted by offender
(EN 1627) (as specified in the standard EN 1627)

RC 1 N Attempted break-in involving
physical force, such as kicking, jumping
or cranking actions, etc.
These windows have little resistance
to break-in.
RC 2 An opportunist offender will also try to
break open the window using basic tools
such as screwdrivers, pliers and wedges
etc.
©Schüco | schueco.com
These windows have average
resistance to break-in.
USEFUL INFORMATION – THE RESISTANCE CLASSES
RC 3 The offender also tries to gain entry with The basic security of your PVC windows depends on their resis-
a second screwdriver and a crowbar. tance class (RC), as defined in EN 1627, which indicates whether
they have inbuilt protection against being pried open or wheth-
These windows have a high level of er the locks will withstand the force of a drill. Six of these classes
resistance to break-in. apply to windows and doors in total although modern window
systems are usually made to comply with RC 2 standard.

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