Visionary
design windows

Josko is one of the leading industry brands in terms of innovative design. Our window systems are inspired by modern and avant-garde designs and stress visual unity, with an identical compact aluminium appearance for both interior and exterior. These windows are very compact, with 3 levels of compactness, flush glass and edges for both the exterior and interior These systems do away with glass strips and joints because here we follow the ground rule: "Beauty is in what you don't see". This design is primarily used in modern architecture which is identified by straight lines and cubic, angular edges.

Styles are born from the difference. Each design defines beauty in its own way. The traditional graceful lines from Josko fit the tastes of those who like a classical look for their home. Design is not in competition with contemporary trends here; it is timeless. Dignified, rustic, and pleasant impressions are typical of the classic style. Our standard window systems as well as classic/traditional designs create this architecture based on a sense of well-being.

Read more about architectural styles here...

Modern/Avant-garde

Compact external appearance

Classic/Traditional

Uniform, offset external appearance

When choosing the correct window, the question of material is the most important. With Josko window systems, you have a choice between wood/aluminium, uPVC/aluminium, and uPVC. Each has its own special features and advantages and we are happy to tell you all about these.

You can see here exactly how the various materials differ.

However, when choosing Josko you don't have to decide on all materials straight away. With us, you can combine different materials with an eye towards getting the best price, while also guaranteeing your house's exterior has a matching style. The question is simply which materials you use in which room. You can use high quality wood/aluminium windows in rooms where you spend a lot of time (colour adapted to the interior design), and you can use less expensive uPVC/alumium windows in the basement or bath (largely white interior).

A window's ability to insulate against heat and noise depends on its design, frame material, and the respective window system. The glazing is also critical. At Josko, you can adjust the thermal and noise insulation of your windows to your exact preference. Each system is therefore available in warm as well as very warm versions that differ from one another either in terms of window thickness and/or the use of a thermal foam.

Thermal and noise insulation are very important considerations when purchasing windows. No wonder all manufactures want to show the best insulation ratings for their windows. However, to be certain they're accurate one has to compare. In order to objectively compare heat and noise values, we have created an explanation of the most important units and factors, like the U-value, on this page. Whatever criteria, measure, and standard you use, Josko encourages you to compare. Our windows achieve the best values with regards to thermal and noise insulation.

Strict, official examination procedures confirm these top va

Thermal insulation