Uncompromisingly symmetrical, slim and as multifaceted as life.

The world's first coordinated complete system for windows and sliding doors.

Symmetrical slimness.

Today begins a new era with ONE by Josko. ONE has brought back the sleek elegance of the windows without sacrificing today’s thermal insulation and other requirements.

ONE by Josko is also the only window and sliding door system of its kind with uncompromising symmetry. Inspired by the look of a picture frame - equally narrow on all four sides and not dominant, but restrained in its effect.

Barely 3 fingers wide

A novel window and sliding door system with extremely slim frames that are only half as wide as ordinary windows and doors: only 5 cm - on all four sides and in all elements.

eine Ansichtsbreite von 5 cm

Maximum freedom in choice of material.

For decades, you could choose only between wood, plastic or aluminium for windows. With ONE App, new opportunities are opening up. In addition to the pure, purist aluminium version in 3 interior colours, the revolutionary App technology by ONE impresses with beautiful surface applications for maximum effect.

Harmoniously adaptable to every living room

In addition to the elegant and proven Josko wood surfaces in wild oak, oak, spruce, larch and Oregon, walnut, art concrete, glass, brushed aluminium and genuine steel are also possible for ONE App. This enables ONE App to perfectly match almost any style of living.

Wild oak | brushed | white heaven N09
Oak | brushed | black pearl N16
Larch | brushed | scandic white N333
Oak | brushed | natural N07
Oak | brushed | white heaven N17
Spruce | brushed | white heaven N170
German nut* | bog-look oak natural N14
Oregon | brushed | white pearl N170
Wild oak | brushed | silver grey N06
Wild oak | brushed | white heaven N09
Wild oak | brushed | silver grey N06
Aluminium | brushed | C32
Aluminium | brushed | C33
Aluminium | brushed | C34
Aluminium | brushed | C35
Real steel | burnished | ES01**
Glass | shiny | black
Art concrete | AB01

ONE
Vision

With ONE, we have fundamentally changed the way we see windows and doors in the future. ONE is unlike previous generations of window and sliding door systems. This film takes you on an exciting journey into the time when we rethought the window.

5 cm symmetrical slimness

ONE combines the narrow and elegant window frames of earlier epochs with the technical achievements of the modern. With its innovative concept, ONE inspires the experts and advances to the forefront of today's window technology.

Slim & shapely

Minimalist is the new ONE FE window handle specially developed for ONE. Matching the slim frame, this completes the elegant overall picture and allows the necessary gap to the soffit. The integrated ONE FE handle with rectangular rosette is available in 3 colours.

Same symmetrical view width

It makes no difference if elements with different functions (such as turn-tilt windows and fixed parts) are arranged side by side or on top of each other: The slim and all-round symmetrical frame look always stays the same. From inside and outside. One system, one look.

Outwardly hidden stick

From the inside, only the wing is visible, the stick on the outside is so completely hidden in the frontal view. From the outside, this principle works in reverse. In the version without application, ONE looks completely the same from outside and inside.

Design room element

Thanks to its material variants, ONE App is the first window and sliding door system that can be harmoniously adapted to any living room. As purist as the ONE concept is, so numerous are its possibilities. With ONE, the function of the window does not determine the material, but the architecture and the individual style.

Slim & shapely

Minimalist is the new ONE FE window handle specially developed for ONE. Matching the slim frame, this completes the elegant overall picture and allows the necessary gap to the soffit. The integrated ONE FE handle with rectangular rosette is available in 3 colours.

Same symmetrical view width

It makes no difference if elements with different functions (such as turn-tilt windows and fixed parts) are arranged side by side or on top of each other: The slim and all-round symmetrical frame look always stays the same. From inside and outside. One system, one look.

Outwardly hidden stick

From the inside, only the wing is visible, the stick on the outside is so completely hidden in the frontal view. From the outside, this principle works in reverse. In the version without application, ONE looks completely the same from outside and inside.

Design room element

Thanks to its material variants, ONE App is the first window and sliding door system that can be harmoniously adapted to any living room. As purist as the ONE concept is, so numerous are its possibilities. With ONE, the function of the window does not determine the material, but the architecture and the individual style.

Symmetrical lines.

Symmetrical on all four sides: Fixed part and openable part with the same frame width and the same glass - inside and outside. In conventional windows fixed parts and openable part are in no way symmetrical.

Conventional aluminium window

ONE by Josko

Conventional aluminium window

ONE by Josko:

Almost invisible insect protection

You can feel it, but you do not see it. The newly developed insect screen from ONE is the first one whose frame has the same face width as the window frame. While conventional tenter frames have an unsightly offset to the window frame, the insect screen-clamping frame ONE is congruent with the window frame - you think you see the window itself. This provide you with an inconspicuous and elegant solution to keep annoying insects out. Well thought out symmetry slimness.

The rebirth of symmetry

Why windows have never been symmetrical until now? Have you ever noticed that windows in the view are always asymmetrical? Almost all windows and doors are plastered on the side and top - but not below. The more plastered - keyword: slime frame widths - the larger the difference and thus the asymmetry. ONE has solved this problem: The interior looks like a picture frame - the same width all around and symmetrical.  

Deep symmetry

Unlike conventional windows, ONE does not allow depth jump of the glass planes between openable and fixed parts. In addition, ONE has only a very small recess to the glass outside and inside. The glass is set in the middle of the element.

Symmetrical as a picture frame

The more the floor is plastered laterally in conventional systems, the more asymmetrical the view - the window frame remains wide at the bottom. With ONE, however, the 5 cm visible frame view width is symmetrical on all 4 sides.

Conventional aluminium window

A windowsill with a sense of symmetry

The beauty of the symmetry of ONE ALU DS2 fascinates at first sight. The design window sill without visible screw connection not only preserves the circumferentially equally slim frame look, it even highlights the symmetry.

Conventional aluminium window

Multi-part elements

The continuous, slim symmetry of ONE is also evident in multi-part window and door elements. The view width of the middle section is only 11 cm - just over a hand's width. The picture frame optics typical for ONE are preserved:
The dividing joint is exactly in the middle. Each wing is completely symmetrical, both inside and outside.

Conventional aluminium window

Fascinating in comparison

Smart Mix

Everything fits together

ONE App allows full compatibility with other Josko interior elements such as natural wood or interior. One of the facets why we speak of the world's first coordinated complete system.

Even interior window frames or baseboards can be combined with ONE for a harmonious overall picture.

Well thought out system

Minimalist elegance

Two systems, united to a new world. In combination with the frameless all-glass system FixFrame ONE unfolds its full strength. Frameless look, paired with uncompromising symmetry slimness - for properties with a particularly high aesthetic standard.

Barrier-free zero threshold

Without the slightest threshold one steps out onto the terrace and into the garden. The boundaries between inside and outside are blurred. The zero threshold lies in one plane with the ground - without pitfalls and depressions.

Elegant drainage grate design

Did you know that 32 litres of water per minute flow off a standard glass wall (5 x 3.2 m) even during normal rain? That's 1,920 litres per hour. When the wind blows at the same time, it presses the water up to 120 km/h against the door. Under these extreme conditions, the design drainage grate has proven its tightness in an independent testing institute.

Sliding door with highest comfort

The barrier-free sliding door ONE S can be easily opened with one hand - without lifting. And that with a maximum sash weight of 500 kg.

Full control

Specially developed for ONE is the new minimalist ONE FE window handle. With its slim, functional design, it fits well in the hand. With ONE FE, a handle is available for the first time, which can be used not only on windows, but also on sliding doors, home and interior doors - one handle, one look.

The ONE FE is available for ONE in the aluminium version and for all other Josko window systems with oval rosette in 3 colours.

Experience ONE up close

TRADE FAIRS

Building & Living Ried im Innkreis: 8-10 November 

SHOWROOMS

Josko Center Wien

Josko Center Andorf

Josko Center Munich

Josko Center Stuttgart (from March)

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