We design and create transformable and organic spaces

KLEIN is a leading international company based in Barcelona, with 90 years of experience in designing, manufacturing, and marketing sliding, folding an swing door systems.

We focus on satisfying our customers’ needs and becoming their main partner in all architectural projects involving designing and creating interiors aimed at improving users’ quality of life.

KLEIN sliding, folding and swing applications play with movement and light to structure versatile and flexible residential and commercial interiors.

The KLEIN story

    1920 - 1950

    Years 20's - 50's

    In 1926, Ernesto Klein Theuman left Vienna and settled down in Barcelona, where he started a small metallurgy company. Difficult times were approaching. He and his family were evacuated in 1936 and sent to Germany. They wouldn’t return to Barcelona until four years later. It was then that Ernesto Klein Theuman resumed his business, laying the groundwork for what would later become KLEIN®.

    1950 - 1980

    Years 50's - 80's

    His son, Gerardo Klein Stastny , who worked at the company from a young age, came into leadership in 1953. His management would mark the beginning of the growth and diversification of the company. It became renowned for its curtain rails, with an extensible rail system. In the 1960s, KLEIN® would launch its first sliding track for doors weighing between 40 and 1,000 kg, the iconic "K" Line.

    1980 - 2010

    Years 50's - 80's

    In 1980, the company became a Corporation (Sociedad Anónima) in order to tackle new challenges. Under the direction of engineer Miquel Tàrrega Lloret, a focus on constant innovation served as a turning point for the company and its projection: at that point, KLEIN® began designing systems for closets, such as the Roll family, systems for wood panels, such as a hidden clamping system called Retrac, and the first applications for sliding glass doors (Rollglass, Unikglass, Extendo), acting as a pioneer in the use of pressure clamping. This high level of innovation, along with Elizabeth Klein Balaguer’s work as the head of international commercial activity, would allow for the opening of 57 markets across all five continents.


    From 2010 until today

    The fourth generation of the family has taken over the management of a brand renowned for its quality and reliability. Marc Tárrega Klein, the current CEO, updated the management system and strengthened the positioning of KLEIN®, investing primarily in international expansion, updated production processes, and the launch of new products, with the goal of continuing to empower KLEIN® into the future as the best partner as far as interior partitioning and enclosures are involved.

We strive for excellence in all our actions.

We are committed to delivering quality products and services, as well as ensuring sustainability. We feel involved towards people and society. Our hallmarks are:


    We continually review our products and services to maximize the value we deliver to our customers.


    Our working processes are built to systematically improve our practices and organization to achieve our stakeholders’ highest level of satisfaction.


    Our processes and organization systematically pursue agility, we are focused on being a rapid-response organization.


    Our products and services are designed to meet the market’s highest reliability standards, we deliver on our commitments, and we are a reliable partner.


    We aim to sustainably balance financial performance, social wellbeing and environmental preservation


We aim to sustainably balance financial performance, social wellbeing, and environmental preservation. Within this framework, our activity positively impacts three areas: our people, the local community, and the environment.

Our people

We encourage professional development, based on equal opportunities as well as on work-life balance.

Our priority is to provide a suitable working environment for our people to grow professionally, allowing them to balance both their work and their personal needs. With this aim in mind, everything is made to favour personal growth and establish long-term relationships based on trust. We also implement processes that ensure their wellbeing, health, and safety.

KLEIN is committed towards its teams’ health and has designed a general Health Plan that encompasses prevention and communication actions. These actions include the annual flu vaccination campaign and annual medical check-ups.

The local community

Proximity is a key element to us and we support the communities within which we operate. We collaborate with different schools, universities, job placement centres (etc.), public institutions and non-profit associations. It is a way to nurture the social network close to our organization.

The environment

We dedicate resources to minimize the environmental impact of our activity.

We are committed to protecting the environment, as well as to preventing pollution through efficiently using our resources, reducing our CO 2 emissions and promoting the criteria of a circular economy. We improve the environmental aspects of the life cycle of our products.

KLEIN has an Integrated Quality Management System in accordance with ISO 9001 and 14001 which aims to act efficiently in terms of product quality, service quality, occupational risk prevention and environmental protection. Our environmental policy management ensures not only compliance with legal regulations but also implies a firm will and clear objectives for continuously improved environmental protection. In this respect, Klein has a photovoltaic solar energy installation that generates the equivalent of 70% of the company's electrical consumption. We are also equipped to proactively lower our energy consumption, and we have implemented a zero-waste policy aimed at reducing, reusing, recycling, and recovering.


The most demanding international design certifications endorse our expertise, the result of 90 years of experience and constant innovation.

We are fully committed to providing excellent products, services, and management to all the stakeholders with whom we operate. We do not simply deliver what we agree to, we strive and challenge ourselves daily to exceed expectations.

We carry out design, modelling, manufacturing, and post-production entirely in our Barcelona factory, as well as all assembly. Furthermore, we take pride in a job well done and give full importance to details that are invisible but make all the difference.

KLEIN® systems are tested to over 100,000 cycles and we offer a 5-year guarantee on both systems and braking devices.

Our certifications

Certification that ensures that the product meets certain technical requirements related to thermal insulation, sound insulation and air permeability.

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Certificate of Spanish Origin for products manufactured in Spain. It certifies, through an audit process, the Spanish origin of products.

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ISO 9001 is a set of internationally recognized standards that define the requirements for a quality management system (QMS).

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The products are guaranteed for a period of FIVE years, from the date of purchase against any manufacturing defect.

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The EPD (Environmental Product Declaration) allows to highlight an environmentally friendly product, based on life cycle information according to international standards and quantified environmental data, and verified by an independent third party.

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The most ambitious and practical internationally recognized certification for designing and manufacturing healthy, circular and responsible products for a better future for all.

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ISO 14001 is a globally recognized standard that outlines the requirements for an environmental management system (EMS).

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The product

We are committed to developing products that contribute to the well-being of people and have the least possible impact on the natural environment. We audit with EPD and CRADLE TO CRADLE systems to set quantifiable improvement targets.

Likewise, we work towards a circular economy, designing and manufacturing increasingly sustainable products. Through CRADLE TO CRADLE certification, we lead a path of transformation in the building market, through products having a positive impact on people and the planet, respectful of nature and free of elements that have negative health impact.

We carry out life cycle analysis and EPD audits of our products to ensure traceability and quantify their impact with international sustainability indicators.


Our R&D department is at the heart of our design process and new products development. It is the guardian of the brand's very high standards.

We are proud of the international recognition of our customers and suppliers, as well as the endorsement received from the main international certification and design labels and entities.

Best of Year


Reddot Winner

IF Design Award