cen rees : This would be a very busy project for a 1st Build ! Having said that, you could check out the link to ernieanderica.info/shop where they have
plans for a 8''
Build over an existing
wood floor with Bricks ( or brick sized pavers) and large pavers as a base, this is a proven design and
should meet your future Builds ! Hope
This helps !
For the Future good of the Crarts ! Be safe, keep warm ! As always, your comments and questions are solicited, and welcome ! PYRO - LOGICAL Big AL !