Aarsleff carries out renewal of vent ducts of all cross sections, i.e. round, square and rectangular.

In addition, we offer to renew chimneys that are to be transformed into vent ducts.

The renewal is implemented with a tube of acid-proof polyester fibre impregnated with resin. The tube is tailored for the vent duct, i.e. whether it is an air supply duct or an exhaust duct.

The tube is inverted in soft condition into the vent duct from an access point. When the tube is installed and cured, it becomes hard and abrasion-resistant with a smooth and easy-to-clean surface. The vent duct is CCTV inspected before and after relining.