An investment that could have a signaling effect for the entire insulation material industry: ROCKWOOL announces a 16-million-euro program for its plant in Flechtingen (Saxony-Anhalt). The Danish manufacturer of mineral wool is thus sending a clear signal for the German location – and this at a time when the construction industry is under pressure and many competitors are reducing capacity.
The Flechtingen plant, one of three Rockwool production sites in Germany, produces stone wool insulation materials for residential construction, industry and technical insulation. According to the company, the announced investment aims at capacity expansion, technological modernization and efficiency improvement. Concrete details on additional production tons, new production lines or planned thermal conductivity classes have not yet been published. Relevant for planners and buyers: The investment could improve the mid-term availability of stone wool products with low bulk density (below 40 kg/m³) and optimized lambda values in the range 0.035–0.040 W/(m·K).
The decision for Flechtingen comes at a time when the European insulation material industry is struggling with declining construction volumes and rising energy costs. While competitors such as ISOVER (Saint-Gobain) or Knauf Insulation are consolidating their strategies, Rockwool is betting on expansion. The investment underscores confidence in long-term demand for non-flammable insulation materials of fire class A1 according to DIN EN 13501-1 – particularly in multi-story residential construction and industrial applications where fire safety requirements are increasing.
From a sustainability perspective, stone wool is an interesting material due to its high recycling content (up to 80% in some product lines) and its durability. Currently applicable environmental product declarations (EPD) show a carbon footprint for stone wool of approximately 300–500 kg CO₂-eq./m³, depending on bulk density and binder system. Whether the investment in Flechtingen also includes decarbonization measures – such as electric melting furnaces or green electricity – remains to be seen. Comparable initiatives in the industry, such as the recycling plant by Austrotherm for XPS insulation materials, show that circular economy is increasingly becoming a competitive factor.
For the regional labor market in Saxony-Anhalt, the investment means stability: The plant employs around 200 employees. Whether additional jobs will be created remains open. The measure is part of a series of location decisions by German and international building material manufacturers that, despite economic weakness, are betting on the long-term transformation of the building stock – driven by the Building Energy Act (GEG) and EU requirements for decarbonization.
