Granulated boiler slag is used in gardening and landscaping as paving sand and as a drainage material.
Granulated and sieved boiler slag is very suitable as paving sand. In privately used areas, such as garage driveways, sieved material with a fine grain size can be used; for heavy-load applications, such as industrial areas with truck traffic, crushed and dried raw material must be used.
Boiler slag does not contain organic substances, such as pollen or spores that might cause the growth of weeds between the paving stones. Furthermore, the material has a very good drainage effect. This is useful especially in winter, because the ground is not lifted by frost.
Granulated boiler slag is recommended for use with permeable paving stones because it supports the drainage effect of the stones so that the water can flow away better than on other surfaces.
Granulated boiler slag is used in several areas of building construction. The high drainage efficiency and thermal insulating properties of this material make it especially interesting for use under the base slab and as a filler material around the building. The granulated material prevents water from reaching the concrete and being drawn into the concrete by capillary action.

The material is also very suitable for the construction of drainage trenches that are used to conduct surface water into the ground. Boiler slag can also be used to improve building ground in order to keep areas dry. Its good drainage effect makes the material a perfect choice for these applications.