Stone wool insulation solutions for thermal, fire, acoustic and moisture protection in construction and industry.
Deutsche Rockwool GmbH & Co. KG
Gladbeck · Flechtingen · Marktredwitz · Neuburg a.d. DonauNew on Amplifa
About ROCKWOOL
ROCKWOOL is a manufacturer of stone wool insulation materials and products, with the group headquartered in Denmark and listed on the Copenhagen stock exchange. Stone wool is made from volcanic basalt rock, dolomite, bauxite and recycled material: the raw materials are melted at temperatures above 1,500 °C, spun into fibres, bound with a binder, conditioned in the curing oven and cut to size. The product range includes insulation solutions for roofs, facades, ceilings, floors, interior walls, building services and fire protection systems such as Conlit, as well as products for marine and offshore, horticulture (Grodan), transport and water management. The group employs around 12,000 people in 40 countries and sells its products in over 120 countries. In Germany, the company has sites in Gladbeck, Flechtingen, Marktredwitz and Neuburg an der Donau.
- Site
- Gladbeck
- Processes
- Stone wool insulation manufacturing (material handling/charging, melting, spinning, wool collection,, Manufacture of stone wool insulation (melting at >2700°F / 1,500°C, fibre spinning, curing in the, Production of stone wool acoustic insulation on an international scale (melting, spinning, curing), Technical consulting, Project support, Further training/ROCKWOOL Forum (digital and on-site), Sample ordering, Tools & calculators for energy savings
- Materials
- Basalt (volcanic rock), Dolomite, Bauxite, Slag (by-product of steel production), Recycled mineral wool, Binder (urea-modified phenolic resin), Coal (fuel), De-dusting oil
- Certificates
- Supplier Code of Conduct, ISO 9001
- Founded
- 1909 (JSON
- Employees
- approx. 12,000
- Industries
- Construction/building construction, Building services, Fire protection, Timber construction, Industry & OEM, Marine/offshore
- 01
Raw material provision (basalt, dolomite, bauxite, slag)
- 02
Material handling and dosing
- 03
Melting in the furnace (>1,500 °C)
- 04
Fibre spinning
- 05
Wool collection and layering
- 06
Curing and cooling
- 07
Cutting and marking
- 08
Recycling of wool waste
- 09
Packaging and shipping
Raw materials and manufacturing processes
Basalt (volcanic rock)
Core raw material of stone wool, accounting for around 97 percent of the insulation products.
Dolomite
Rock as a component of the raw material mix for the melt.
Bauxite
Aluminium-rich rock added to the raw material mix.
Slag (by-product of steel production)
Recycled secondary raw material with high melting efficiency.
Recycled mineral wool
Internal wool waste is granulated and fed directly back into the spinning process.
Urea-modified phenolic resin (binder)
Pre-fabricated, not classified as hazardous binding agent that glues the fibres together and cures during curing.
Coal
Fuel used to achieve the required melting temperature in the furnace.
Stone wool
Non-combustible, recyclable fibre insulation for thermal, fire, acoustic and moisture protection.
Sites
Gladbeck
DESite Germany
- Materials
- Stone wool
Flechtingen
DESite Germany
- Materials
- Stone wool
Marktredwitz
DESite Germany
- Materials
- Stone wool
Neuburg a.d. Donau
DESite Germany
- Materials
- Stone wool
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Stone wool insulation manufacturing (material handling/charging, melting, spinning, wool collection,Casting | – | – | – | – | Basalt, Dolomite, Bauxite, Blast furnace slag, Recycled mineral wool, Phenolic resin binder, Coal, De-dusting oil |
| Manufacture of stone wool insulation (melting at >2700°F / 1,500°C, fibre spinning, curing in theCasting | – | – | – | – | Basalt stone, recycled slag |
| Production of stone wool acoustic insulation on an international scale (melting, spinning, curing)Casting | – | – | – | – | Basalt, Dolomite, Bauxite, Slag, Binder |
7 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Melting furnace (fossil-fired, melting temperature >2700°F / approx. 1,500°C, heat recovery) | – | – | – | – | Ranson, West Virginia, USA |
| Spinner (fibre spinning machines) | – | – | – | – | Ranson, West Virginia, USA |
| Curing oven (gas-fired) | – | – | – | – | Ranson, West Virginia, USA |
| Cutting and marking system | – | – | – | – | Ranson, West Virginia, USA |
| Recycling system (granulator, return of wool waste) | – | – | – | – | Ranson, West Virginia, USA |
| Packaging and palletising system (packing / unit load) | – | – | – | – | Ranson, West Virginia, USA |
| Stone wool production lines (factories) | – | 4 | – | – | Milton ON (1988), Grand Forks BC (1999), Byhalia MS (2014), Ranson WV (2021), |
Additional services
Quality and sustainability
Quality assurance and inspection of purchased materials to ensure compliance with agreed specifications are part of the management system; all suppliers must sign the Supplier Code of Conduct. Sustainability targets (UN SDGs, since 2016) govern the plants' waste, water and energy metrics.
| Evidence | Gladbeck | Flechtingen | Marktredwitz | Neuburg a.d. Donau |
|---|---|---|---|---|
| Supplier Code of Conduct | ||||
| ISO 9001 |
History
- 1909
Year of company foundation according to company information (JSON-LD).
- 1937
First stone wool production; founded as a family business in Denmark.
- 1988
Acquisition of the first North American factory in Milton, Ontario.
- 1999
Acquisition of the Grand Forks, British Columbia factory.
- 2009
Expansion of the Milton plant with the Grodan production line.
- 2013
Acquisition of the Chicago Metallic plant (Rockfon metal grid) in Chicago, IL.
- 2014
Commissioning of the first US factory in Byhalia, Mississippi.
- 2015
Membership/partnership with NFPA and NASFM in the field of fire protection.
- 2016
Alignment of the company with the UN Sustainable Development Goals.
- 2021
New North American plant in Ranson, West Virginia, starts production.
- 2026
Sascha Sommer becomes Marketing Director for Germany and Austria.