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Last edited 06 May 2021
As a variation of ‘substratum’, the term can refer to a layer of residual bedrock, sediments or deposits that are found beneath the topsoil. For the construction of foundations, the substrate type (e.g. soil, rock, clay, and so on) is one of the factors that will determine the type of foundation used.
Biodiversity in new housing developments: creating wildlife-friendly communities, published by the NHBC Foundation in April 2021 defines a substrate as: ‘A medium on which vegetation grows, including soils, sub-soil, wood and masonry.’
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