The pink foam is all in, and now it is time for us to put in the first layer of sand. 9 inches of sand in the bottom of the bathtub, which we will compact with a borrowed plate compactor (thanks George Ramos!).
On this first sand layer we placed a welded wire mesh to act as our guide for installing the PEX radiant tubing that will put the heat into the sandbox. After we have the PEX tubing installed we dump yet more and more sand, filling up the sandbox to within 6 inches of the top (Ken's side) and 4 inches of the top (Adele's side). At the entrance to Ken's side we leave a deeper depression in the sand to create a very thick entry floor for heavy trucks.
Thankfully we did not forget to install the half bath plumbing before we put in all the sand. We also put in a drainage lines for both studio's floor drains. These drains will actually go out to the garden, since it will be runoff from Ken's stone carving water and Adele's greywater dump.
