Resistance Classes (RC)

There are six resistance classes with increasing protective effect from RC1N to RC6 in accordance with the European standard DIN EN 1627 (the old designation, used until September 2011, was WK 1 to WK 6). RC stands for Resistance Class.

RC1N - Attempted break-in using physical force such as kicking, body-slamming, jumping against, levering up and the like. Elements of this resistance class are therefore mainly suitable as protection against vandalism. Windows of resistance class 1 offer only very low burglary protection.

RC2 - The opportunist offender additionally attempts to force the window open using simple tools such as a screwdriver, pliers or wedges. Windows of resistance class 2 offer low to average burglary protection.

RC3 - The offender additionally attempts to gain entry using a second screwdriver and/or a crowbar. WK3 windows offer high burglary protection. In a private household, protection to resistance class RC 2 and RC 3 is usually sufficient.

RC4 - The experienced offender additionally uses sawing and striking tools, e.g. an axe, crowbar, hammer and chisel, as well as a cordless drill. Windows of resistance class 4 offer very high burglary protection.

RC5 - The very experienced offender additionally deploys power tools, e.g. a drill, jigsaw or reciprocating saw and an angle grinder with a maximum disc diameter of 125 mm. Windows of resistance class 5 offer very, very high burglary protection. The resistance time is at least 15 minutes. 

RC6 - The very experienced offender additionally uses power tools such as a drill, jigsaw or reciprocating saw and an angle grinder with a maximum disc diameter of 230 mm. Windows of resistance class 6 offer extremely high burglary protection, and the resistance time is at least 20 minutes.