Aarsleff offers rehabilitation of built-in or exposed rainwater downpipes.

A tube of acid-proof polyester fibre impregnated with resin is produced in length, dimension and wall thickness, so that it fits perfectly to the downpipe in question. The tube also comes with a corrosion-proof surface.

The tube is inverted in soft condition into the downpipe from the top or the bottom. When the tube is in place and cured, the ends are cut and the downpipe can be connected to the remaining installations.