Windows Kosak are a reliable choice for you


In the company Mizarstvo Košak d.o.o. we are engaged in the production of wooden windows, doors and sliding walls.
Our windows decorate many new buildings, as well as facilities protected by the Institute for the Protection of Cultural Heritage.
In the past years, we have specialized in the production of unique panoramic elements of large dimensions.

Eco subsidy

For renovations and new buildings

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Delivery time

Windows are delivered within 30 to 45 days


Events and news

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Visit our new window showroom in Ljubljana