Rockflow stone wool elements have an absorption capacity of up to 95%. The elements may look like solid blocks, but their fibrous structure ensures up to 95% free space inside. When it rains, this free space rapidly fills with water. The video below shows how a block of stone wool absorbs water, then releases it to the layer below.
High capacity in practice
The high capacity of Rockflow’s stone wool elements has a number of advantages in practice. For instance, a large amount of water can be captured in a relatively small area. In urban areas, there is often a lack of space. Both above ground due to buildings and infrastructure, but space is also at a premium under the ground. In some areas, the average maximum groundwater level also plays a significant role in determining the maximum capacity of an infiltration system. An infiltration system, including Rockflow systems, is installed above this level so that they are able to discharge the water below the surface, whatever time of the year.
The solution and ultimate design is always tailor-made, taking into account not only the required capacity and available space, but also aspects such as the infiltration speed of the soil. This varies according to soil type and has a major influence on how rapidly rainwater can infiltrate into the soil after a heavy shower.