90 years of tradition and innovation in construction materials
Veit Dennert (1901-1956), father of Hans Veit Dennert, founded a business for construction materials in the 1930s and started producing building materials in 1948. This has been the foundation of Veit Dennert KG.
60 years of tradition and innovation in lightweight aggregates
In 1960 Hans Veit Dennert and his brother set up a plant in Postbauer-Heng, Germany for the production of high strength expanded clay. The lightweight aggregate was successfully distributed worldwide under the brand name „detoon“.
The Poraver® success story starts in 1983
After the production of expanded clay from 1960-1982, Hans Veit Dennert succeeded in 1983 in replacing the clay required for the previous lightweight aggregate production with recycled glass - Poraver® expanded glass was born. At that time, it was a completely new type of building material that no one had heard of or known what this new and comparatively expensive material could be used for. Hans Veit Dennert, however, was firmly convinced that a product with such unique high-class technical properties would revolutionise and conquer the market for lightweight aggregates.
The success story continues
Hans Veit Dennert launches the state-of-the-art production plant for poraSpheres® hollow glass microspheres in Schlüsselfeld on 22 December 2022. Years of intensive research have made it possible to develop poraSpheres® and the necessary plant technology.
PORAVER® GMBH is the first and only manufacturer to produce hollow glass spheres from recycled glass in excellent quality and to sell them to its customers worldwide.
40 years ago, the Poraver® success story began with the market launch of Poraver®. The new products poraSpheres® and poraComp® will continue to drive the company‘s outstanding development in the decades to come.
The Poraver® success story
PORAVER GmbH is the global market leader in the manufacture and sales of expanded glass. The company is among the pioneers in the field of innovative lightweight filling materials. In the early 1980s, the company‘s own research work led to the development of a process for the industrial production of expanded glass granulate from recycled glass - a milestone in the company‘s history. Since then, the company, founded in 1983, has been producing the lightweight aggregate Poraver® expanded glass granulate at its production sites in Europe and North America for customers and distribution partners all over the world.
PORAVER North America Inc.
At the site in Innisfil, Ontario, Canada, 90 km north of Toronto, been successfully produced since 2007 and distributed to international industrial companies. The plant has a production capacity of 100,000 cubic metres per year, which can be expanded to 200,000 cubic metres. The facility includes production and offices for administration, sales, logistics and quality control.
Production plant Schlüsselfeld
This new factory building lays an important foundation and creates the conditions for further company growth. The development of the site began in 2018. In the meantime, the first production hall has been built and production started in 2022.
A gradual expansion to up to 7 production lines is planned. This will increase the annual capacity of the three Poraver® plants to over 500,000 m³.
R&D poraComp® Center
Since 2018, our plastics experts have been developing and optimising a wide range of plastics products and formulations with the help of Poraver® and poraSpheres®.
Equipped with state-of-the-art plant technology and the corresponding analysis capabilities, we are your competent partner for compound development and production.
On our compounding as well as on our injection moulding complex test series on both our compounding and series of tests. A modular mould concept guarantees high flexibility in the production of standardised test specimens. We offer professional advice and access to our inhouse plastics technical centre for the development of customised compound formulations.
for expanded glass
Management & Headquarters
of the Poraver group
Since 2006, the management and head office have been based in Schlüsselfeld. The modern office building houses the departments Administration, Sales, Marketing and the Poraver® Customer Service Centre with corresponding laboratory facilities
Hans Veit und Johanna Dennert Stiftung
The Hans Veit and Johanna Dennert Foundation has the objective of helping people in need, regardless of their age, gender, denomination, marital status or membership of a particular social group, if aid is not provided by other organizations. In the long term, the company shares will be transferred to the foundation in order to secure the continuation of the PORAVER Group in the spirit of the founder.