Residential Building X1, Cologne Hahnwald, Germany, Peter Neufert's private residence, built between 1959 and 1962.

 

The roof shell of the residential building spans the rooms without supports. Sound and heat insulation by Heraklith boards and glass wool are mounted under plasterboard

A carport leads into the facade of red cubes which serve as balconies and cupboards. The garden facade is glazed. A basalt stone wall separates the large living room with fireplace from the house bar. The entrance with access to the kitchen, wardrobe and guest toilet is separated from the living room by a blue sliding glass door.