How do I handle drains or channels integrated into a surface?

It is common for a surface to be drained not from its edge, but through drains, gullies, or channels integrated into the surface. This is typical for large areas, such as flat roofs, school yards paved with asphalt or interlocking pavers, parking lots, and fully enclosed balconies. Integrated drainage systems can also be found in basements, workshops, underground car parks, or stables.

A permeable floor covering made of rubber granulate generally does not hinder drainage. Depending on the permeability and the volume of water, water either fully or partially percolates through the rubber granulate tiles and flows along the slope to the drain or gully. Water that cannot infiltrate through the rubber tiles – for example during heavy downpours – flows off the surface following the gradient.

It is essential that the drainage channels or shafts remain accessible both in the substrate (i.e. the original level on which the new tiles are laid after renovation) and in the new surface of the rubber tiles to avoid tripping hazards.

For smaller areas, it is usually sufficient to drill several continuous holes (approximately 10 mm in diameter) with a wood drill in the area of a rubber tile located over a gully. In larger or heavily used areas, and when drainage channels are overbuilt, it is advisable to install a custom-fitted grating that is flush with the top edge of the rubber tile. This ensures both effective drainage and high safety.