Resistance classes for windows and doors
Resistance classes have been defined for windows and doors based on an in-depth collaboration between window manufacturers, the police and insurance companies. The resistance classes for burglary protection are categorised in the DIN V ENV 1627/2011 standard. There are six resistance classes for windows and doors which enhance burglary protection. The resistance classes concern the resistance time on the one hand and the type of intruder on the other. The simplest form of protection is offered in resistance class RC 1 N. A window security system of this kind is suitable for windows and balcony doors on the upper storeys of a building, for example. This burglary protection level relates to a relatively simple break-in using physical force. Maximum burglary protection is offered in resistance class RC 6.
The burglary resistance capacity offered by the individual classes is as follows:
Resistance Class RC 1 N
As explained above, windows and doors in this resistance class offer the lowest burglary protection level. If the window in question is a clearly visible window or one on a top floor, this resistance class is quite sufficient. Break-in tests show that a window of this resistance class can withstand an attack by an opportunist burglar for about three minutes. This window, however, is only protected against the use of physical force such as kicking, using a shoulder or attempting to pull the window out. The window is not made of safety glass and can therefore be smashed.
Resistance Class RC 2 N
This resistance class already offers substantially more burglary protection for windows. It is still not made using safety glass, but the window is so firmly anchored in the frame that it is difficult to break open within three minutes using simple tools. Windows of this kind are also suitable for upper floors or for clearly visible windows.
Resistance Class RC 2
Window burglary protection features have again been designed to resist break-in attempts by opportunist burglars and provide adequate resistance for three minutes. Using simple tools, such as wedges or screwdrivers, for example, the window is difficult to open. The pane of the window is also protected. This resistance class legislation requires that safety glass is used instead of standard glazing. Safety glass is comprised of at least two individual panes that are bonded together with an adhesive, transparent foil. This glazing is comparable to that of an automobile windscreen and is also referred to as laminated glass. If a perpetrator tries to smash the glass using stones or an iron bar, the intermediate foil provides further resistance that makes it significantly more difficult to break through.
Resistance Class RC 3
In this resistance class, windows offer resistance to burglary attempts by experienced burglars for at least five minutes. The window pane is made using safety glass and the frame is designed to withstand an attack using a crowbar for a certain length of time.
Resistance Class RC 4
Windows and doors in this resistance class already ensure a high level of burglary protection for commercial use buildings. This resistance class specifies that an experienced burglar will be unable to break into a building within ten minutes, even using heavy-duty tools.
Resistance Class RC 5
A window with this resistance class will even withstand angle grinders with a disc diameter of 12.5 centimetres or sabre saws.
Resistance Class RC 6
Windows and doors in this resistance class offer the very best protection for banks, companies storing large sums of cash and private residences with valuable possessions. This window security level withstands an experienced burglar attack using heavy-duty equipment for up to twenty minutes.
Resistance classes RC 1 N, RC 2 N and RC 2 cover approximately 85 % of all break-in categories.
Windows and doors with RC 1 N, RC 2 N and RC 2 resistance classes are therefore recommended for private homes. PVC systems can only be used for resistance class RC 3 in certain cases and cannot offer higher resistance classes.
The Inoutic / Deceuninck profile systems have been successfully tested for burglar deterrence at the renowned ift Testing Institute in Rosenheim, Germany. The test was carried out in collaboration with the well-known fittings hardware manufacturer Winkhaus in Telgte, also in Germany.
The Eforte, Prestige and Arcade systems are certified as being compliant with resistance classes RC 1 N, RC 2 N and RC 2.