FROM A SMALL GARAGE STARTUP
TO A LEADER ACROSS EUROPE
INOTHERM CELEBRATES 35 YEARS OF EXCELLENCE
FRONT DOORS THAT HAVE GRACED HALF A MILLION HOMES


Take advantage of the 35th anniversary offer: 5% off Inotherm entrance doors and windows
Inotherm's beginnings date back to 1991, when Anton and Verica Šenk launched a small production facility in a neighbour's garage making thermal insulation glass, with their office based in their own home. At the time, there was no large production facility and no extensive team – just a clear vision and a strong conviction of what they wanted to create.
As the new millennium approached and the first aluminium front door was developed, their vision was clear:
The idea was simple: every home deserves a high-quality, tailor-made door designed for the people behind it. Over the past 35 years, this vision has established Inotherm as a leading European manufacturer of aluminium entrance doors.

Today the company is led by Nina Šenk Kosem, who, together with her father, continues the success story as the second generation.

Verica Šenk was not just the CEO – she was the heart of our company. Together with her husband, Tone, she laid the foundations of Inotherm and, through her warmth, wisdom, integrity and exceptional empathy, shaped the values that continue to define us today.
She had a remarkable ability to connect people, understand their stories and bring ideas to life. Where others saw challenges, she saw opportunities and pursued them with perseverance and passion. Through her selfless generosity, she left a lasting mark on the local community, where she quietly stood by those most in need.
Her legacy is not only written in the company's history, but lives on in its people, in our relationships, and in the values we carry forward every day.


To mark this important milestone, we are introducing a special anniversary offer as a token of our appreciation for your trust and an invitation to become part of our story.
Until 17 July 2026, you can take advantage of a
on our Exclusive, Select and Premium entrance doors and Vision aluminium windows.
For inspiration, we have curated a selection of 35 iconic front doors, which you can explore below.
At the heart of 35 years of development, milestones and achievements are the people who made it possible. From the colleagues who helped build the company from its earliest days, to the partners who have grown with us over the decades, and the new generation continuing the journey today.
Their stories are an integral part of the Inotherm journey.
From our first steps in the 1990s we have grown into a leading European manufacturer. This development is not only reflected in the numbers, but in the progress achieved across key areas that shape both the company and Inotherm's entrance doors today.

After launching aluminium entrance door production in 1999, we surpassed 10,000 units sold per year in less than a decade, and in 2017 became Europe’s largest manufacturer of aluminium entrance doors.

From entrance doors alone, we have expanded our development to include complete entrance solutions – canopies, letterboxes, LED lighting, house numbers, stand-alone windows and other features that together create a cohesive entrance to the home.

As technology has evolved, we have upgraded our doors with smart solutions such as the Inosmart smart unlocking system, offering greater convenience, improved security and ease of use.

As the company has grown, we have also taken on greater responsibility for the environment and the community. Through investment in sustainable processes, support for local projects and sponsoring athletes, we actively give back to society.
Today, through its production, expertise and network of partners, Inotherm creates entrance doors trusted by more than half a million homes. Each year, more than 44,000 doors are produced and delivered to numerous countries across Europe and the Middle East.
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Inotherm remains focused on the future. We are entering a new era with a vision of becoming a one-stop shop for doors and windows for the home.
We are expanding our range with Vision aluminium windows, developed in-house, with lift-and-slide doors to follow in the next phase. At the same time, we continue to invest in the development and expansion of our production capacities, while strengthening our presence and partner network despite challenging market conditions.
In doing so, we remain true to the vision established by Anton and Verica Šenk: to create high-quality solutions for the home, tailored to the people who live in it.
