How environmentally friendly is stone wool for water management?

01 August 2018
sustainability, circularity, fibres, umbrella, lapinus

Stone wool is a natural product made primarily from the volcanic rock basalt. Basalt is a sustainable raw material, sourced directly from our earth and is almost inexhaustible: every year the earth produces 38.000 times more basalt than is used for the production of stone wool by ROCKWOOL.

Stone wool is produced in a sustainable and environmentally friendly way and is 100% recyclable. The high-tech production process ensures that the stone wool products are made in a way that is as sustainable and environmentally friendly as possible.

The environmental impact of stone wool for water management is visualized in our infographic, see downloads on the right side.

The Life Cycle Assessment

The Life Cycle Assessment (LCA) is a method to quantify the total environmental impact of a product throughout its life cycle. All environmental aspects of the extraction of the necessary raw materials as well as those of the production, transport, use and disposal of the product are taken into account.

An important environmental aspect is the contribution of a product to the emission of greenhouse gases, expressed in terms of (GWP, Global Warming Potential).

An LCA can also be used to compare the overall environmental impact of products and systems throughout their life cycle. The analysis in the accompanying infographic shows that the GWP contribution of Rockflow (water management system based on stone wool) is considerably less than that of plastic systems.

Besides that, stone is robust and functionality is unabated during its entire lifespan. It requires no maintenance or replacement. 

Additionally, stone wool is 100% recyclable to new stone wool of the same quality. Stone wool elements for water management systems are partly made from recycled stone wool. Since 1992 ROCKWOOL has its own recycling process in place where waste material from our own production process and building sites is re-used for the production of new stone wool products. Where possible also waste materials from other industries is utilized in this recycling process.

Stone wool elements for water management are in part produced using recycled stone wool. Stone wool therefore is the ideal fit for a building process where environmentally friendly products are preferred. 

The contribution to the GWP of Rockflow per process group:


Raw material supply and manufacturing.


Packaging and transportation to the installation site.

Installation and Use

Construction / installation process.

End of Life

Deconstruction, waste processing and disposal.


Re-use, recovery, recycling.

application, lapinus, wood, focus

Wool made from stone

Stone wool is literaly wool made from stone. It can occure naturaly around volcanos. When molten lava is slung around at high speeds, it forms into small fibres. By nature, these fibres tend to flock around in tuffts that can be found hanging on the braches of trees around these volcanos. At ROCKWOOL, we have more than 80 years experience of mimicing this natural process. We use the tamed volcano principle to melt natural stones together with secondary raw materials. The lava is spun into fibres that are collected and shaped into different products. A resin is used to bind the fibres together. The resin that we use is durable and does not give off toxic gasses during a fire.

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