Hi

We build a href="http://www.garenberg.co.uk/garden-offices.html"garden offices/a all over the country.

It is true you will need to have an air gap under the shed or it will rot.

The foundation will depend on the ground type. As its a shed you will not want to spend too much but you need to ensure you have a solid base. If your going for sepate pads using concrete blocks you need to make sure the block sits on firm ground. This can be as easy as removing a few inches of top soil to uncover a firm stoney substate. However if its wet and boggy with soft ground going down a long way you will need to dig larger holes, say 1.5' deep and fill and compact with hardcore. If the latter is the case it will probably be easier to put down a whole area of hardcore and compact the lot as discribed in an earlier post.