Clara. The window with a view.

Your panoramic window to the world

Glass is the architectural design element of the 21st century. Clara windows combine the transparency, extensiveness and openness of a glass façade with all the benefits of a tilt-and-turn window or pivoting window – in both single-leaf or multi-leaf designs. What’s more: The innovative design permits the construction of a multi-leaf window without a mullion.


Clara windows provide you
with up to 15 % more natural light

More to see

per square metre

Filling the rooms with natural daylight and being connected with the outside environment – many builders share these wishes. The window frame accounts for up to 35 % of the surface area of classic wooden windows, plastic windows or aluminium composite windows consist, and this unfortunately also reduces the incidence of light. This is where Clara windows come into play: The unique design of the frameless casement allows up to 15 % more light into the building and thus also increases solar input.

Clara = 90,9%

PVC = 41%

Wood = 57,5%

PVC/Aluminium = 41%

Wood/Aluminium = 57,5%




Comparison of the light incidence of Clara windows compared to conventional windows.

Natural light

for a greater feeling
of wellbeing

Daylight has a positive effect on our feeling of well-being. Thanks to the higher incidence of light, Clara windows provides our melatonin household with an additional dose of daylight, creating the basis for a healthy day-night rhythm.

The green light

for high levels
of energy efficiency

Outstanding heat insulation

Thanks to insulating glass, thermal insulation, innovative glass coatings and warm edge spacers, a modern window has thermal insulation properties that are essentially better than its predecessors in the mid-1990s. Technological progress thus means that fans of large, floor-to-ceiling window fronts, have much cause for celebration, as they now also have the green light from an energy point of view. In winter they help to reduce heating costs and in summer cooling costs.

Perfect for energy-oriented refurbishment

The trend towards extensive panoramic windows can be easily accommodated with passive house and plus-energy designs, as Clara windows impressively demonstrate. They can meet all the Minergie standards and are ideal for the energy-oriented refurbishment of building envelopes. Depending on the window design, Clara windows achieve the best values of 0,75 Uw for the heat transfer value and 0,5 Ug for the windows or glazing. (Certificates can be seen on

Every Clara window
is a unique item


filigree design

The elegant, continuous glass surface of a Clara window allows the boundaries between inside and outside to merge because the casements are flush, constructed without steps and edges. Functional components such as the frame, the locking mechanism, fittings or seals are subtly concealed behind narrow, surrounding enamel strips.

(Almost) boundless

design freedom

Every Clara window is a unique item that adapts perfectly to people’s personal preferences in terms of interior design and architectural style. The entire RAL colour palette is available for the design of the frame construction as well as the enamel edges inside and out. The window handles are of course freely selectable.

Living comfort

with safety benefits

Window cleaning becomes child’s play

Clara windows are a prime example of what modern windows can contribute towards our feelings of personal comfort. The outstanding thermal insulation value of 0.75 W/m²K guarantees cosier rooms with a maximum feel-good factor. The innovative frame design on the inside also ensures excellent sound insulation. Window cleaning also becomes child’s play due to the fact the window frames and casements are aligned with one another. No corners and edges, no window seal in which dirt can accumulate.

What’s more: A window with optimal burglary protection

A Clara window can be levered out only with difficulty thanks to the continuous glass surface and concealed fittings. Moreover, they are made of specially hardened glass panes. In addition to their elegant appearance and optimum thermal insulation properties, you also benefit from a window that offers outstanding burglary protection.


Technical data of the Clara window



CLARA W/A 3.1.2


Frame cross-section 58 x -62 x 58 mm Aluminium cladding, CLARA/Gutmann, fixed in place by clip holders, sliding on the wooden construction.


54 mm to 58 mm


6/18/4/24/6 mm

Laminated safety glass
8-2/14/4/24/4 mm or 9-4/14/4/24/4 mm

Soundproof glass
8/14/4/24/4 mm or 10/12/4/24/4 mm


Standard: Spruce
Available for an additional charge: Oak, larch, meranti
With covering paints: Finger-jointed wood
In the case of glazes: Solid wood


4-layer system structure, impregnated, base coat and top coat


Brand: Siegenia Axxent 24+, concealed in the frame rebate


3 sealing levels


Anodised aluminium EV01, other colours available for an additional charge


Uf (frame profile)= 1.81 W/m2K
Ug (glass)= 0,5 à 0,7 W/m2K
Uw (window)= 0,75 bis 0,91 W/m2K conf. SIA 331


Rw (C, Ctr) = 41 (-1,-4) dB according to EN 717-1


Class 8A according to EN 12208


Class B2 to B3 according to EN 12210


Class 4 according to EN 12207


Are you looking for new windows, would you like to replace your old windows or are you planning the energy-oriented refurbishment of your building? In that case you should get to know Clara windows. The elegance of the windows with frameless casements made entirely of glass will delight you! Of course, all the Clara windows meet the Minergie Standard. We are happy to advise you and completely without any obligation for you in our showroom.

  • Duggingerstrasse 24, CH 4153 Reinach BL
  • +41 (0) 61/715 99 55
  • +41 (0) 61/715 99 59

You are very important to us, all information received is always treated confidentially.

Window Showroom and consultation in Reinach

Welcome to Reinach. Experience in our new showroom CLARA, the world's first window with a frameless casement completely made of glass and manufactured in Switzerland. Its elegant and refined design gives you limitless creativity freedom. On this occasion, you may also like to take a look at our workshop.
Whether you want a non-binding consultation or want to experience CLARA windows live, we are here for you!
We will gladly answer your request for a showroom visit per e-mail to or per phone on + 41 (0) 61/715 99 55.