hidden doors United Kingdom

... London waiting for any burglar. Force entry through one of the bulletproof doors or windows will trigger hidden shotguns loaded with non-lethal ammo. If somehow house occupier still standing, the owner can retreat to a hidden, fortified room where he can flood the rest of the house with tear gas. Other security features include biometric scanners and trap doors. The fortress cost its owner (a...

... Germany. They have been tested for Air Permeability, Water Resistance, Security and Resistance to Wind Load. The framing of the Keller minimal windows sliding doors can be hidden to provide a minimalistic sliding door design that offers barely visible framing. They boast a vertical sightline of just 21mm, and the outer framing can be hidden behind internal plasterboard and external render. Unlike some ‘slim’ sliding systems you do not get any visible frame above the finished floor level. This creates a full floor-to-ceiling glass finish.