Burglarproof windows:
Sit back and relax

Burglarproof windows:
No breakage!

Burglar almost always select the perceived weak point of the house: the windows and doors. That is why you should give the burglar what he deserves - a burglarproof RC2, RC3 or RC4 window. With the above and with the safest safety glass of the world, we have successfully warded off thousands of burglary attempts, everywhere in the world. With an increasing tendency.

By the way: An alarm system does not really protect against burglaries. Because only the mechanical burglary protection can delay the burglar - the longer the culprit is delayed the more safe is the object.

Burglarproof windows
in private residences.

RC2 windows or RC3 windows?

Our experience shows: Really burglarproof windows starting with the resistance class RC3 windows. The lowest resistance class RC1 offers no burglary protection, RC2 windows offer at least a basic protection.

RC3 windows offer approximately five, RC4 windows even ten minutes burglary protection. In our experience, this is the most frequent selection for the securing of private residences. In contrast, RC5 and RC6 windows are qualified for especially exposed risks, for example, for nuclear power plants or military facilities.

Overview of the safety windows:
RC1 – RC6.

RC2 Fenster oder RC3 Fenster?

RC1 windows

RC1 Fenster - 0 min.

Zero burglary protection,
not recommended

RC2 Fenster oder RC3 Fenster?

RC2 windows

RC2 Fenster - 1-3 min.

Basic recommendation for mansions with a resistance time of about one to three minutes against amateur culprits with SILATEC P6B glass.

RC2 Fenster oder RC3 Fenster?

RC3 windows

RC3 Fenster - 5min.

Our recommendation for an effective burglary protection in mansions: about five minutes resistance against practiced culprits in connection with SILATEC P6B safety glass.

RC2 Fenster oder RC3 Fenster?

RC4 windows:

RC4 Fenster - 10min.

Our recommendation for the perfect burglary protection. About 10 minutes resistance against experienced burglars in connection with SILATEC P8B safety glass.

RC2 Fenster oder RC3 Fenster?

RC5 windows:

RC5 Fenster - 15min.

Normally over-dimensioned for private residences, especially with respect to the economic viability. Approx. 15 minutes resistance time in connection with SILATEC P8B glass.

RC2 Fenster oder RC3 Fenster?

RC6 windows:

RC6 Fenster - 10min.

Clearly over-dimensioned for private residences, rather for extremely exposed risks such as nuclear power plants. Approx. 20 minutes resistance time in connection with SILATEC P8B glass, also against experienced culprits with powerful electrical tools.

Burglarproof windows
in a hardness test

Burglarproof windows:
everything goes.

You must make no compromises for burglarproof windows: We present them in all possible forms, colors and materials. They can be completely integrated into the existing architecture. We are producing the glass with a width of up to eight meters and this largeness can additionally increase the value of any building.

Burglarproof windows are available in many variations: in a historic or in a modern form, as fine and filigree sliding doors or as room enhancing and view opening panorama windows. As fixed glazing, turning, swivel-tilt, swing-casement, sliding, escape, roof, lattice or two-leaf French-casement window.

Overview of the
material characteristics

Service lifeapprox. 40-50 yearsapprox. 60 yearsapprox. 70 years
CareEvery two years: glazing,
every five years: varnishing
no care requiredno care required (stainless steel)
EcologyRenewable raw materialhigh energy production,
therefore long service life
and good recyclable
recycled versions can be delivered,
longest service life
Insulation valuesgoodonly in connection with woodonly in connection with
supplementary equipment
Other benefitsbreathablehigh weather resistanceEnables very thin profiles,
very robust even for public traffic
Bulletproof windows made of wood

Burglarproof windows made of wood

Wood gives a warm feeling and as a sustainable natural raw material it is also breathable. Wood also feels natural when touched, the characteristic texture and optic of the surface can additionally emphasize the style of the architecture but it can also be understated in a refined way. However, as a natural material it requires frequent care (see table above).

Burglarproof windows made of
wood and aluminum

These burglarproof windows combine natural noblesse and the living comfort of wood with the straightness and the ease of care of the aluminum. They are recommended everywhere where the weather has a strong impact or where the burglarproof windows are difficult to access - repainting on the 7th floor can be very expensive. We can produce these burglarproof windows also exactly in accordance with your requirements: with a width of up to eight meters, and in all forms and colors that you want.

Bulletproof windows made of wood and aluminum
Bulletproof windows made of aluminum or steel

Burglarproof windows
made of aluminum/steel

These burglarproof windows have an even longer service life than wood windows and they do not need any care. For this purpose, we also deliver forms, colors and formats exactly as you want it. You will enjoy the daily opening and closing because our burglarproof windows made of aluminum are surprisingly light weight - this can especially be experienced when using large formats. The energy consumption during production is relative high, but we ensure a good recyclability.

Burglarproof windows as
filigree sliding elements

Large format sliding doors open the room. Optically with the flooding daylight, but also factual with the incoming and exiting air. The room becomes even wider, bounteous, and the outside and inside become one - thresholds will not be an obstacle because they will be installed totally flush with the adjacent areas. The filigree sliding elements can also be actuated electrically and the opened windows can disappear in a wall pocket. SILATEC safety glasses strengthen the construction significantly as our burglar tests show.

Bulletproof windows as filigree sliding elements

How much do
burglarproof windows cost?

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Burglarproof windows: What does the police recommend?

The official experts state it clearly: The mechanical burglary protection has priority over the electronic protection. “Electronic burglary protection” covers, for example, the alarm system, security cameras, etc. And these devices only report the burglary, however, they do not prevent it.

In addition: Alarm systems may even encourage burglars. Because the culprit sees, that there are valuables to be stolen. In contrast, “mechanical burglary protection” provides burglarproof windows and burglarproof glass and only those objects can hinder the potential culprit against entering the building. The alarm system cannot replace this protection, however, it can supplement it. Also to be recommended: Trained guard dogs. Ideally one for the inside and one on the outside.

Burglary protection
window: The standard
does not test the glass!

Test standards for burglar resisting windows offer a first orientation. But: Are there any burglars that conform to the standards? Let us look at RC2 windows. Based on the test standard it offers three minutes of resistance. However, in practice it is already broken open in about one minute. Why? If the burglar finds that he cannot open the RC2 window, then he attacks the glass. And now it progresses fast: Because the P4A glass that the standard specifies is broken within ten seconds! The standard does not even test the glass.

In addition: The test engineer may during the test only use small tools such as a screwdriver. However, if the real burglar comes with a larger tool, then the RC2 window is quickly opened. It is similar for burglarproof RC3 and RC4 windows: The glass is also not tested here. While the RC3 resists for five minutes, the glass that the standard specified - namely P5A glass - is already destroyed after 15 seconds. The RC4 window achieves already ten minutes, the glass only 30 seconds (traditional P6B).

SAFE glassGlass NOT tested

RC2 windows:

P6B glass

approx. 5 minutes

Resistance time according to the standard: about 3 min. P4A glass is specified according to the standard. Only approx. 10 seconds!
The glass is also NOT tested according to the test standard!

RC3 windows:

P6B glass

approx. 5 minutes

Resistance time according to the standard: about 3 min. P5A glass is specified according to the standard. Only approx. 15 seconds!
The glass is also NOT tested according to the test standard!

RC4 windows:

P8B glass

approx. 10 to 20 minutes

Resistance time according to the standard: about 3 min. Traditional P6B glass is specified according to the standard. Only approx. 30 seconds!
The glass is also NOT tested according to the test standard!

Retrofit burglarproof windows

Retrofitting represents no problem in case of the fixed glazing. For pivot-tilt windows normally after construction year 1980. Normally we exchange glass and fittings and equip these with a mushroom head lock. Burglarproof attachment windows can be integrated in case of older or even landmarked objects: In this case, the burglarproof windows are installed in front or behind the existing windows, which means at the outside facade or inside in the rooms.

Burglarproof windows:
When which?

Test standards are good, but the actual experience value from practical use are even better. The local condition, the individual risks at the location as well as your personal hazard potential are always decisive for a recommendation. When in doubt, ask your local public authority or contact us.

Here is a first coarse orientation based on our decades long practical experiences:
Safety windowBurglary protectionBurglary protectionApplications
RC1 windowsno burglary protection no recommendation no recommendation
RC2 windowsapprox. 1 to 3 minutes in case of amateur culpritsSILATEC P6B Basic protection against private residences
RC3 windowsapprox. 5 minutes
in case of practiced burglar
SILATEC P6B effective burglary protection for private residences
RC4 windowsapprox. 10 minutes
in case of experienced burglars
better SILATEC P8B
perfect burglary protection for private residences
RC5 windowsapprox. 15 minutes
in case of practiced burglar
min. SILATEC P8B normally over-dimensioned for private residences
RC6 windowsapprox. 20 minutes
in case of experienced burglar
min. SILATEC P8B for extremely endangered objects, for example, nuclear power plants

The highest number of safety windows in private residences are RC3 and RC4 windows. In combination with SILATEC P6B or P8B glass, they offer effective or even perfect burglary protection. RC2 windows still present basic protection, while RC5 and RC6 windows are normally over-dimensioned for private residences.

Tested by the best experts in the world:

Namely by the burglars themselves. We experience about 100 burglaries per year, or better: Burglary attempts, and this since more than 20 years. Based on this, we develop the safest safety solutions in the world; this means burglarproof windows up to the highest resistance classes. What does the experience show? As a matter of principle, the following is valid: The higher the expected booty, the higher the effort, on the other hand: the longer the burglary lasts, the higher the probability that the attacker will give up.

And it should not be forgotten: to be able to hammer for only five minutes with an ax on a pane needs an almost inhuman physical condition. Other major questions: How high is the discovery risk? Is the burglarproof window covered or clearly visible? How does the burglar proceed and what tool does he use? How are the escape option and how fast are the action forces at the location? Is this a residential area or a vacation home? By the way: Burglary attempts in vacation homes take place if the residents are at the location. Because the promise of booty is significantly higher.

Burglarproof windows:
and the glass?
Live demo
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Inquire about a burglary test


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Your data will be kept confidential and will not be handed to third parties.


The test standard does in part not test the glass - and glass is specified that can be destroyed quickly! The burglar is in this case quickly in the building. This is comparable to a tested and certified security rope for mountain climbing - with a brittle carabiner.

Therefore, the RC2-RC6 windows are only really burglarproof when using SILATEC glass: safe frame, safe glass. By the way, one is by all means more careful in other standards for windows and doors: the door frame as well as the glass will of course be tested for burglary resisting escape doors or panic doors and also for full penetration resisting windows.

Burglarproof windows, burglarproof glass

Tested frame/resistance timeGlass not tested/resistance timeRecommended glass/resistance time
RC2 window/3 minutes P4A glass/only 10 seconds! SILATEC P6B2/5 minutes
RC3 window/5 minutes P5A glass/only 15 seconds! SILATEC P6B2/5 minutes
RC4 window/ten minutes Traditional P6B glass2/only 30 seconds! SILATEC P8B/approx. 20 minutes
RC5 window/15 minutes Traditional P7B glass/less than one minute!1 SILATEC P8B/approx. 20 minutes
RC6 window/20 minutes Traditional P8B glass/only approx. one minute!1 SILATEC P8B/approx. 20 minutes
  • 1This is where also the glass is tested, however, only an inadequate glazing is specified
  • 2SILATEC P6B glass, please do not confuse with traditional P6B glass, which is specified by the standard for RC4 windows: this only provides resistance for 30 seconds.


The standard for RC1-RC4 windows: tests only the window frame - but not the glass! The glass specified by the standard is already destroyed after a few seconds! See table above.

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Do burglarproof windows increase the value of the object?

The burglary protection is advantageous also with respect to the financial performance of your property. Respectively equipped windows do not only provide a good feeling and an increased quality of life but also a measurable value increase of the building. Finally, safety questions become increasingly more critical value factors. They can also be an exclusion criterion during the sale if a burglarproof window can only be retrofitted with difficulties. Because safety is mandatory for upscale residences.

What do the “RC” resistance classes for windows mean?

“RC” is the abbreviation for “Resistance Class”. The previous abbreviation “WK” is therefore obsolete.

Based on this standard, burglarproof windows are categorized ascending from RC1 to RC6 windows. RC1 windows offer the smallest, practically no burglary protection, RC6 offers the highest protection - and this is also reflected in the price. While RC2 windows offer an acceptable basic protection, RC3 and RC4 windows offer a meaningful and effective burglary protection.

What do RC2, RC3, RC4 mean?

“RC” means “Resistance Class”, the class in which the window will be tested. Meaningful burglary protection starts with the resistance class 2, i.e. RC2, RC3 and RC4 are found most often for private residences and RC5 and RC6 are used for especially exposed risks.

What does RC2 N mean?

RC2 N windows are less burglarproof than RC2 windows, because normal window glass is installed here. This can be broken by throwing a rock and the burglar is in the building in a few seconds.

How do burglars break windows open?

Burglars try to crank windows open. For example with screwdrivers, wedges, crowbars. Or they break the glass pane.

How meaningful are lockable window handles?

An unlocked handle is a safety risk, for example, if the culprit can hammer a hole in the glass and afterwards simply opens the handle. However: Who locks all the windows before leaving the house? And opens all again? More meaningful than lockable window handles is resistant safety glass.

How safe are roller blinds?

Roller blinds do not offer any burglary protection.

How important is the alarm system?

Of course, we deliver burglarproof windows also with an alarm system. However, only the mechanical resistance can hold the burglar really back. With a safe window and a safe glass.

Do burglarproof windows exist also for vaults?

Of course. This is a special construction with many tons of weight and special locks. Based on the extreme hazard potential, even the highest class - i.e. RC6 windows and doors - does normally not provide adequate protection.

Which burglary protection is provided by RC1?

Zero burglary protection.

Which burglary protection is provided by RC2?

Basic protection. Based on the standard, the RC2 window must withstand an amateur thief for three minutes - however: a practiced burglar breaks the RC2 window already after approx. one minute. The glass pane breaks already after 10 seconds! Pardon?

Yes, as mentioned above: The glass is not tested by the standard, only P4A glass is specified. And this can be broken within 15 seconds.

If RC2 widows are used, then SILATEC P6B should be used because it withstands an attack for ten minutes.

Which burglary protection is provided by RC3?

Effective burglary protection for private residences. The standard specifies that RC3 windows must withstand a practiced burglar for about five minutes; even against a massive crowbar. However, the glass is not tested, only P5A glass is specified. This can be broken in 15 seconds even by unpracticed culprits. Therefore the recommendation: SILATEC P6B glass - it withstand for more than five minutes, exactly as long as the window. Equipped in this manner, RC3 windows offer a balanced relationship between costs and burglary protection.

Which burglary protection is provided by RC4?

Perfect burglary protection for private residences: The resistance duration for RC4 windows is approximately twice as long as for RC4 windows - which is also reflected in the price. An RC4 window delays even an experience burglar with chisel, crowbar, ax or power drill for approximately 10 minutes.

The standard does not test the glass even for RC4 windows! The standard only specifies normal P6B glass - and that is already broken after about 30 seconds! In contrast, SILATEC P6B glass offers already five minutes protection, even better qualified is SILATEC P8B with 10 to 20 minutes protection. Frame and glass should be equally safe.

Which burglary protection is provided by RC5?

Exceptional burglary protection for private residences:  RC5 windows withstand a total of 15 minutes even against experienced culprits - against electrical tool, e. g. power drill, jigsaw or saber saw and angle grinder with a disk diameter of 125  mm. The glazing is tested for this application. The recommendation: SILATEC P8B with up to 20 minutes. The RC5 window is normally over-dimensioned for the use in private residences.

Which burglary protection is provided by RC6?

The highest burglary protection for private residences: More than 20 minutes protection even against experience culprits with powerful electrical tools, e. g. power drill, jigsaw or saber saw and angle grinder with a disk diameter of 250 mm. The glazing will also be tested for this application. Same recommendation: SILATEC P8B with up to 20 minutes resistance duration. RC6 windows are rather qualified for extremely endangered objects like nuclear power plants.

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