Protecting retained trees on site

What it looks like

Damage to tree roots during construction, often from heavy plant compaction or trenching, can lead to tree instability, disease, and eventual failure.

Why it happens

Tree roots, particularly the majority within 600mm of the surface, are highly susceptible to damage that can compromise tree stability and health. Common site activities such as stripping topsoil, excavating trenches, compacting soil with heavy plant, storing materials, or raising soil levels near trees can cause irreversible harm. Root systems often extend beyond the tree's canopy, sometimes exceeding its height.

What it costs if it is missed

Tree roots, particularly the majority within 600mm of the surface, are highly susceptible to damage that can compromise tree stability and health. Common site activities such as stripping topsoil, excavating trenches, compacting soil with heavy plant, storing materials, or raising soil levels near trees can cause irreversible harm. Root systems often extend beyond the tree's canopy, sometimes exceeding its height.

How to inspect for it

Ensure that designated tree protection zones are clearly marked and respected by all site activities, including excavation and material storage.

How to prevent it

Tree roots, particularly the majority within 600mm of the surface, are highly susceptible to damage that can compromise tree stability and health. Common site activities such as stripping topsoil, excavating trenches, compacting soil with heavy plant, storing materials, or raising soil levels near trees can cause irreversible harm. Root systems often extend beyond the tree's canopy, sometimes exceeding its height.

Basis in regulation

• BS 5837

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