Pipeline renovation

Most water and sewerage pipelines have been in the ground for 30 and more years. What condition are they in? We can only guess. Blockage, leaking and burst pipes cause unpleasantness for people and damage to nature. Similar problems are encountered by us in Estonia, too. This means that many of the existing water and sewerage pipelines are already so old as to require being replaced.

With each year, costs related to the replacement of old pipelines increase. To date, the commonest solution has been to dig up old pipelines and replace them with new ones. No doubt, this is the most wide spread method but is not always expedient financially. Often, digging may prove impossible in practical terms due to tight working conditions, busy traffic or great depth.

An alternative solution is to replace pipelines without the need to dig them up. This is made possible by the use of no-dig or “digless” methods. The said methods have been used by AS Terrat for over ten years.


In 1994, we started with the “sliplining” and Flexoren methods.

Today, we are able to lay or renovate pipes using the Grundocrack, Grundoburst, Grundodrill, MaxiLine or Inpipe methods. Thanks to our partners in Europe, we are offering solutions in multiple situations, often in challenging ones.

Using “digless” methods also allows the laying of new pipelines. Grundoram or the ramming of steel pipes, moling and Grundodrill directional drilling allow the construction of new pipelines under roads, railways and also rivers.
Using various technologies and working with the client and designer allow the identification of optimal solutions to most problems in the construction and renovation of pipelines.