PPTT, or The Ownership of Producers for Thermo-Insulating Carpentry, is an esteemed organization of employers in the execution and fitting of windows, doors, facades, and insulating glass units. Established in December 2002, PPTT was founded by employers in the window and door production and installation industry. With a total of 111 members, PPTT represents all kinds of companies active in this field.

PPTT's main objectives include promoting the manufacturing of high-quality windows, doors, facades, and insulated glass units, as well as supporting and defending the interests of manufacturers and installers in their relations with public authorities, unions, and other entities. They have actively contributed to the standardization of national, European, and international regulations through their involvement in various committees and organizations.

PPTT also offers certification for technical and professional qualifications, specialized trainings, and professional certifications for employees. They participate in projects funded by the European Commission and Structural Funds, and they actively engage in fairs, trade missions, and conferences to showcase the latest advancements in the industry.

Reputed for their expertise and commitment to excellence, PPTT provides valuable advice, technical assistance, and conflict resolution services to ensure the smooth operations and growth of the industry.