Wall 275mm think (2 leaf + 75 cavity). What width do the trench foundations need to be ? TIA, Simon.
- posted
18 years ago
trench foundation width
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- posted
18 years ago
Depends on the soil type.
Rick
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- posted
18 years ago
How high is the wall? Unless the soil is very poor the minimum width is probably determined by practical considerations, e.g. if you are digging the trenches by hand 400mm is probably the minimum, whilst with a JCB you might get away with 300mm. Also note that the narrower the foundation the more accurate the excavation needs to be.