Is stone wool strong enough?
"The most frequently asked questions about stone wool infiltration systems relate to their strength," says Driessen. "People wonder if it will hold up."
To illustrate just how sturdy stone wool is, Driessen often suggests placing five Rockflow elements side by side on a flat surface. "Then try to take out the middle one. You won't be able to. This is because the fibres of the material mesh together, so there's an enormous amount of friction, which provides strength."
In addition, stone wool also has the strong and durable properties of the basalt stone from which it is made. The structure of the infiltration elements is also designed to make the stone wool extra strong. "You notice that when you try to press it in by hand," says Driessen. "That's almost impossible. This is because the element consists of a 3D network of stone fibres."
What are the basic guidelines for 'correct installation' of stone wool infiltration systems?
To get the most out of a stone wool infiltration system, correct installation is crucial.
In practice, this means taking into account a few basic guidelines:
- The fibres that make up the elements are oriented in one direction. To achieve the maximum strength properties, the fibre direction of the elements must be the same when they are installed. This is why Rockflow elements always stand upright.
- Only when the sides are filled with sand and the top is covered with a layer of sand or granulate is it possible to drive over the buffer with light equipment.
- During installation, make sure that you do not work with equipment that is too heavy. An installation manual is available for the axle loads. After the top layer has hardened, heavy equipment can stand on the stone wool without any problems.