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Drive block paving

How do ground conditions change the depth of your dig ?

3 Answers from MyBuilder Driveway Pavers

Ok lets say for instance your ground is clay and holds a lot of water you would need to excavate lower and install crushed concrete prior to sub base this will hold up better as no limestone and also aid drainage


Answered 3rd Jul 2017

As a rule of thumb most driveways only need 150 of Type 1 sub-base but when excavating you will see if the ground is soft, a good way of testing is the dig your heel into the ground or gentle push a steel bar in it will give you a indication of what we call the CBR value, if soft take out another 75mm
Regards Peter.


Answered 8th Jul 2017

You should also lay a geotextile membrane before you lay the base. This creates a barrier between the sub soil and base and at the same time helps to spread the weight of the base.


Answered 16th Aug 2017

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