Dekkers Sp. z o.o. is the first international subsidiary of the Tectum Group (Belgium). It was established in 2005 and has its registered office in Piastów.

To date, Dekkers has completed orders for over 600 000 m2 of different kinds of roofs. The company specialises in the installation and renovation of flat roofs (traditional, reversed, green roofs) and sloping roofs. Our services also include insulation and waterproofing.

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Architecture Member since 2012
Piotr Szymczyk ul. Grunwaldzka 48
Piastów 05-820


Brussels Airlines is the Belgian airline group that offers the widest choice of flights to and from its base at Brussels Airport.

A fleet of 43 aircraft and about 3500 employees from the Brussels Airlines Group ensure around 300 punctual flights every day, connecting the capital of Europe with more than 60 prime European, African and US airports.

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Transport and Logistics Member since 2010
Monika Gruszczyńska ul. Bielska 28
Warsaw 02-394

Luc Van der Biest

Individual Member Member since 2018
Luc Van der Biest Eikstraat 5
Aalst 9300


Reynaers Aluminium is a leading European specialist in the development and marketing of innovative and sustainable aluminium solutions for windows, doors, curtain walls, sliding systems, sun screening and conservatories. Driven by energy-efficiency and the willingness to take responsibility for the environment.

Besides a wide range of standard solutions, we also develop tailor-made solutions for all market sectors – from residential to commercial and industrial projects. Our high-quality systems all meet the most stringent demands in terms of comfort, security, architectural design, and energy-efficiency. Reynaers is not only a supplier, but also a valuable partner— for architects, fabricators, solar installers, project developers, investors and end users. Founded in 1965, Reynaers currently employs over 1,770 workers in 40 countries worldwide and exports to more than 70 countries on 5 continents. The company, with its headquarters in Duffel, Belgium achieved an annual turnover of 387 million euros in 2016.

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Constrcuction Member since 2017
Reynaers Reynaers ul. Okulickiego 12
Piaseczno 05-500
+48 22 715 77 21 http.://

Willemen Polska Sp. z o.o.

Design, fabrication and assembly of steel structures

We offer our customers a highly complementary range of building activities, from civil engineering and industrial construction to residential and non-residential projects to road building, either alone or in consortia. Such synergies not only open up many more opportunities to us but also strengthen the bond between our companies and our image.

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Dieter Ingelbinck Ogrodowa 7
Warsaw 00-893

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