Security window frame add-on

The Invisible Shutter

Knowing that grilles and shutters can easily be bypassed by resourceful criminals, Hammerglass offers "The Invisible Shutter" - Hammerglass ADD-ON. Apart from blocking the view of the shop, the grille has in many cases given the shop owner a false sense of security as it can be easily removed using a chain attached to the vehicle's tow bar. Hammerglass ADD-ON is the burglar protection that stays permanently in place.

Recommended alternative to grilles and shutters

Hammerglass ADD-ON consists of a Hammerglass pane in a steel profile that can be installed both inside and outside existing fixed or opening windows and doors. The system offers effective protection against burglars. The ADD-ON profile made of cold-rolled steel protects and strengthens existing wooden frames and makes break-in attempts much more difficult. In the event of a break-in attempt, the material offers no leverage as the steel profile only gives way at the point of entry, unlike the more rigid aluminium profiles that bend open when a tool is pressed under the profile. The system also provides energy savings and improvements in the U-value, as well as a noise reduction of 30 dBRw. ADD-ON is certified to provide protection up to security class P8B and is recommended by insurance companies as an alternative to anti-theft grilles and roller shutters.

• Protects against burglary and vandalism - personal protection
• Replaces anti-theft grilles and roller shutters
• External or internal installation in front of existing windows
• Internal installation protects against splinter injuries in the event of an explosion
• 6, 8, 10 or 12 mm Hammerglass in shatter-proof steel profile
• Reinforces existing wooden frames
• Improves the U-value
• sound insulation of 30 dBRw
• Burglar resistance according to EN 1627 RC3
• safety class P8B, EN 356
• Provides increased protection against burglars and vandals for shops, schools, public facilities, etc.

Installation and Warranty

Hammerglass ADD-ON is only installed by recommended installers to ensure the highest quality. The glazing material is 6mm or 8mm Hammerglass (10mm or 12mm Hammerglass for larger windows). The Hammerglass is glued along the edge and then screwed through the steel profile to ensure an optimal result and a secure hold. The installation does not further affect the existing architecture. All Hammerglass panes are laser marked with a logo and production number to ensure traceability for internal quality assurance and security in the event of warranty issues.