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Low-rise building foundations: the influence of trees in clay soils

Series/doc. No Digest Digest 298
Year 1999
Abstract Soil shrinkage caused by the removal of water by trees and other vegetation can result in foundation subsidence. Soil swelling caused by the recovery of moisture following tree removal can result in foundation heave. This digest gives simple design guidance on minimising these effects in clay soils and points to some dangers in current foundation practice.
History Should be read in conjunction with Digests 240, 241, 251 and 412.
ISBN 9781860812781
Subject(s) Building structure
Building foundations/ground floors
Damage/deterioration/corrosion
Special subject areas
Root damage
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Publisher BRE
Publisher History BRE is a building science centre that generates new knowledge through research. This is used to create products, tools and standards that drive positive change across the built environment. BRE helps its government and private sector clients meet the significant environmental, social and economic challenges they face in delivering homes, buildings and communities. BRE is owned by the BRE Trust, a registered charity. The Trust uses the profits made by the BRE companies to fund research and education that advances knowledge of the built environment.
Table Of Contents
Trees, clay, climate and ground movement 1
Proximity of trees to buildings 2
Trees in relation to existing and new foundations 4
New tree planting and existing trees 5
Preventing heave damage to trench fill foundations 6
References and further reading 8


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