Wienerberger Ltd. is a subsidiary of Wienerberger AG – an Austrian concern with nearly 200 years' history, a manufacturer of clay blocks for masonry under the brand name Porotherm.
Kofrajna Technika JSCo is the largest Bulgarian company specialising in developing, designing and production of all types of shuttering, shuttering elements and scaffolding.
Founded in 1990, the company was one of the first private building entrepreneurs in Plovdiv. It specializes in the monolithic type of building - residential, industrial and public projects.
