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Handcrafted quality
made in Luxembourg

For over 50 years, we have been manufacturing high-quality windows, doors and glass facades made of wood and wood-aluminum as a Luxembourg family business.

Create added value

Thinking ahead
from OST

Whether renovation or new construction: energy requirements set the framework today. Our different product lines, therefore, cover all energy requirements – whether for low-energy houses, passive houses, or even beyond. However, we are not only ideally positioned for new buildings.

We also create custom-fit individual solutions when it comes to identifying and eliminating energy weaknesses in renovation projects or listed buildings.



Outstanding insulating properties, modern safety technology, and needs-based thermal, solar, and sound insulation...

Front Doors

Our goal is to find very personal, formally fine-tuned answers to architectural ideas...

Mullion-Transom Facades

It is thanks to the high performance of modern glass that large-scale glazed facades...

Burglary Protection

Effective protection against burglary: a task that today a modern window or door must face...

Privacy- & Sunblinds

The views or glimpses provided by a window are not always desirable. Also, intense summer sun rays can...

Insect Screens

No summer without them: Insects - whether stinging, sleep-robbing, or just plain annoying. But there are ways...

Our Service

Maintenance Service
Our exclusive maintenance service, which we are happy to offer our customers on request, carries out regular and professional control and maintenance activities.

News from OST-Fenster

We inform you about the latest news about windows, doors and glass facades. Also about all other news in our company.
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