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In VETENOR we have the best systems for Windows in KÖMMERLING PVC and in Aluminum of break of thermal bridge and European channel.

VETENOR distributes and installs its products throughout Spain and concentrates part of its production in the north. Provinces such as Galicia, León, Cantabria and of course, Asturias, are some of the places where you can find our best jobs in buildings, villas, urbanizations…

We have made our products according to any need that has been presented through models of classic, rural style … to models of great modernity that adapt to avant-garde buildings. In addition to being present in buildings of new construction, we have made reforms for individuals since we ourselves do the installation of our windows.

Technical documentation


The secret to making the best profiles is in the careful selection of raw materials for the production of PVC, in the latest generation technology and in the precision tools used.
But Kömmerling does not stop there, during the extrusion process, the control department cuts samples of the profiles at regular intervals, verifying that all its properties meet the maximum requirements. In the test bench, the finished windows have to withstand extreme conditions to ensure their water and air impermeability values, and their resistance to strong wind pressures.

Only in this way is the maximum quality guaranteed to the end user. And in Kömmerling quality is the norm.



CORTIZO is a company specialized in aluminum carpentry systems, curtain walls and ventilated facades. It is dedicated to the sale of profiling, accessories and machinery for aluminum.
It offers above all the highest quality in its products, in addition to an optimal customer service, since they take into account the specific needs of each one.
It is a dynamic company, which has experienced professionals in the sector. Customer satisfaction is guaranteed.

– Medium-high-end aluminum carpentry systems.
– Own line of assembly, of RPT, with numerical control.
– Personalized attention and advice through our technical office.
– Quality and speed in customer service.
– Custom product developments.
– Distribution of materials throughout the Iberian Peninsula.



The Winkhaus Group focuses on two business activities: windows and doors. The Winkhaus parent company is responsible for the group’s strategy. We provide the basis for a culture of innovation and quality as a general rule in all areas, with first-class results. We also offer our valuable knowledge, which makes Winkhaus a reliable partner for customers and suppliers.

– Oscilobatientes fittings
– Rotating fittings
– Sliding hardware
– Remote control hardware
– Surveillance of windows and facades

– STV street door locks
– Security Cylinders
– Access control and time management