The de Hollander family has been active in demolition and water works for several generations, and considers the salvage of materials from their sites as a logical part of their activities. The range of reclaimed materials consists mainly of wood, old retaining walls, roof tiles and paving.

In addition, the brothers have a fixed procedure that can significantly extend the life of existing wooden retaining walls. The use of a special sheet piling allows only the part above the water line to be replaced, instead of installing a completely new one. For more information about this technique, please visit the website of Gebroeders De Hollander.