Root Barriers

In areas where the local geology is made up of shrinkable clay sub-soils, significant structural damage can be caused by tree roots undermining the foundations and extracting water to feed tree growth. Root barriers are installed to stop foundation damage associated with mature trees in close proximity to the structure. They are a physical barrier placed between the tree and the property in question. Root barriers are designed in consultation with our geotechnical team and arborists. The barriers can be installed to depths as great as 4 metres below ground.

Our specialist technique allows a root trench to be safely installed close to an existing building. With care it is possible to minimise damage to the area of installation to an area of excavation no wider than 400mm. Trees are often in close proximity to a home, and the roots can threaten to undermine the foundations. Gardens and drives are always carefully protected to minimise damage during the remedial work. Root barriers are installed to pre-determined depths & lengths, even as close as alongside an affected wall. Where sheet piles are installed, they are then cut off just below ground level and capped with concrete prior to reinstatement of the surface finishes. 

Root barriers are available in many forms: steel, copper, fabric, concrete.  Our experts can determine the right form, length & depth for each specific project.  Expert care is needed to also protect the tree roots to prevent destabilising the tree and causing further potential risk of damage from falling.