Aldra
German family-owned manufacturer of windows and doors in plastic, wood, wood-aluminium and aluminium, headquartered in Meldorf since 1888.
Last updated September 28, 2026
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Overview
Aldra Fenster und Türen GmbH is a German manufacturer of windows and doors based in Meldorf, Schleswig-Holstein. As a fourth-generation family business, it produces windows and doors from plastic, aluminium, wood and wood-aluminium. The company sells exclusively through specialist trade partners and maintains a nationwide dealer network of around 800 partners, including prefabricated house manufacturers, building element dealers, carpentry workshops, building material dealers and specialist window companies. The company's roots go back to 1888, when the construction and furniture carpentry E. Albers & von Drathen was founded. In the 1920s, "Aldra Fenster und Türen" first became a brand, with builders, carpenters and joiners ordering windows and doors from the Aldra catalogue; exports went to the Netherlands, England and South America. The furniture business was discontinued. In 1931 the first large and detailed catalogue for windows and doors was published by E. Albers und von Drathen KG. In 1951 the company prepared the expansion of Velux into Germany and found a suitable partner for the production and distribution of Velux roof windows; the first roof window was sold on the German market in early May 1952, and shortly afterwards Aldra produced the first 50 Velux roof windows in Meldorf. In 1960 series production of Aldra windows and doors began, starting with standard wooden windows. In 1968 Aldra developed the "Isolierglas-Fenster IV 68", offering the market the first fully glazed window from a single manufacturer. In 1976 the "Bauelemente aus Kunststoff GmbH" was founded in Meldorf for the production of plastic windows and front doors. In 1978 the RAL quality association first awarded the company the RAL quality mark. In 2002/2003 Aldra presented itself on the market with a modern appearance and an expanded product range. In 2005 a second phase of renewal followed under a new name, different management and a changed structure. In 2006 the largest window and door exhibition in northern Germany, the "Aldra-Marktplatz", opened. In 2011 production capacities were expanded with a completely new, automated production line. In 2013 the company celebrated its 125th anniversary. In 2015 the new "76AD" series was presented, with the company investing in a modern standard and upgrading its operations to a new system with 76 mm construction depth and improved thermal insulation values. In 2016 Aldra became a full-range supplier, serving all market needs with plastic, aluminium and wood. In 2017 the "88MD" series was introduced, meeting high requirements for passive houses and sustainable building. In 2020 ift Rosenheim awarded FSC and PEFC certificates, making windows and doors from certified wood available on request. In 2021 Aldra launched the "Mein Aldra" app to support specialist partners in their daily work. In 2022 the company commissioned a new automated production line in Meldorf, further optimizing work processes and increasing capacities. Today Aldra offers windows and front doors in plastic, wood, wood-aluminium and aluminium, as well as lift-slide doors, parallel sliding doors, burglar-resistant elements, emergency exit and panic doors according to DIN EN 179 and DIN EN 1125, smoke and fire protection elements, barrier-reduced and barrier-free solutions, roller shutters, and products for insect protection, thermal protection, sun protection, ventilation, noise protection and automation. The company positions itself as a reliable, North German, family-run manufacturer with a strong focus on quality, longevity and partnership with specialist trades.
History
The history of Aldra begins in 1888 with the founding of the construction and furniture carpentry E. Albers & von Drathen. In the 1920s, "Aldra Fenster und Türen" first became a brand: builders, carpenters and joiners ordered windows and doors from the Aldra catalogue, and exports went to the Netherlands, England and South America. The furniture business was discontinued. In 1931, the first large and detailed catalogue for windows and doors was published by E. Albers und von Drathen KG. In 1951, the company prepared the expansion of Velux into Germany and found a suitable partner for the production and distribution of Velux roof windows. The first roof window was sold on the German market in early May 1952, and shortly afterwards Aldra produced the first 50 Velux roof windows in Meldorf. In 1960, series production of Aldra windows and doors began, starting with standard wooden windows. In 1968, Aldra developed the "Isolierglas-Fenster IV 68", offering the market the first fully glazed window from a single manufacturer. In 1976, the "Bauelemente aus Kunststoff GmbH" was founded in Meldorf for the production of plastic windows and front doors. In 1978, the RAL quality association first awarded the company the RAL quality mark. In 2002/2003, Aldra presented itself on the market with a modern appearance and an expanded product range. In 2005, a second phase of renewal followed under a new name, different management and a changed structure. In 2006, the largest window and door exhibition in northern Germany, the "Aldra-Marktplatz", opened. In 2011, production capacities were expanded with a completely new, automated production line. In 2013, the company celebrated its 125th anniversary. In 2015, the new "76AD" series was presented, with the company investing in a modern standard and upgrading its operations to a new system with 76 mm construction depth and improved thermal insulation values. In 2016, Aldra became a full-range supplier, serving all market needs with plastic, aluminium and wood. In 2017, the "88MD" series was introduced, meeting high requirements for passive houses and sustainable building. In 2020, ift Rosenheim awarded FSC and PEFC certificates, making windows and doors from certified wood available on request. In 2021, Aldra launched the "Mein Aldra" app to support specialist partners in their daily work. In 2022, the company commissioned a new automated production line in Meldorf, further optimizing work processes and increasing capacities.
- 2022
Commissioning of a new automated production line in Meldorf.
- 2021
Launch of the "Mein Aldra" app for specialist partners.
- 2020
ift Rosenheim awards FSC and PEFC certificates; certified wood windows and doors available on request.
- 2017
Introduction of the "88MD" series for passive houses and sustainable building.
- 2016
Aldra becomes a full-range supplier with plastic, aluminium and wood.
- 2015
Presentation of the new "76AD" series with 76 mm construction depth and improved thermal insulation.
- 2013
125th anniversary of the company.
- 2011
Expansion of production capacities with a completely new, automated production line.
- 2006
Opening of the "Aldra-Marktplatz", the largest window and door exhibition in northern Germany.
- 2005
Second phase of renewal under a new name, different management and changed structure.
Products and positioning
Family-run North German manufacturer of durable windows and doors, sold exclusively through specialist trade partners.
76AD window series
Window series with 76 mm construction depth and improved thermal insulation values, introduced in 2015.
88MD window series
Window series introduced in 2017, meeting high requirements for passive houses and sustainable building.
ADS 65.NI SP smoke protection door system
Non-insulated smoke protection system for interior use, tested to DIN 18095 and EN 1634-3, with 65 mm hollow chamber profiles.
ADS 80 FR 30 fire protection door system
Fire protection door system providing 30 minutes of fire resistance.
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