The Brew Cabin

Posted: **Thu Aug 30, 2007 7:54 pm**

We are just installing a 70m drive and need to find what you guys think about this....

We have excavated the old concrete drive, and it appears the house has been built on what was an old sand quarry. The surface is therefore what can only be described as a sand/brickdust surface around 2 feet deep. It appears to be quite firm to walk on and I need to know whether you think 6 inches of MOt Type 1 will be good enough as a sub-base, or, infact, if we even need to put doen more than 100mm sub-base anyway

Thanks

Dave

Posted: **Fri Aug 31, 2007 3:59 am**

sand is normally a good base for drives as it is fairly non plastic,
are you putting kerbs in?
LLL

Posted: **Fri Aug 31, 2007 7:42 am**

There are already some retaining kerbs around the edges...

Posted: **Fri Aug 31, 2007 5:01 pm**

get the roller/wacker on it and see what happens
100mm of compacted type 1 is normally the minimun,but suck it and see
LLL

Posted: **Sat Sep 01, 2007 12:37 pm**

Sand, sand and gravel, or gravel sub-grades usually have a high CBR, so a minimal sub-base is required. I'd never countenance using less than 100mm.

The Brew Cabin

Laying on sandy soil