Our most important raw material is high-quality Odenwald granite. We extract it in our own quarries through elaborate selection and process it ourselves. The regional granite has outstanding properties. It is particularly light, non-slip and durable.
Through regular petrographic reports and core drilling, we check the quality and yield of the stone in the individual mining zones. This enables us to provide our customers with long-term forecasts on the availability of their preferred products. We inspect the steep walls in the quarry on a weekly basis. We analyse the color and surface structure already in the run-up to production, and determine for which field of application the material is particularly suitable.
Not only the quality of the source material is decisive, but also how the raw materials are processed and refined. At RÖHRIGgranit®, the added value is particularly high. We use our own finishing processes, which we have developed to meet the special needs of our customers for many different applications.
Our employees control and document the production process of each individual batch. We ensure the quality of our products through regular quality controls. We supplement our factory monitoring with external audits, for example by the Road Research Institute of the TU Darmstadt.