Also known as adobe floor, this floor also provides heat to the space via hot water tubes imbedded in the floor, a wonderful system in a space intended primarily for young children. We selected Wirsbo brand tubing, for it's good reputation and easy-to-use fittings. Normally, laying the tubing is a chore requiring a special reel rig, because the tubing is stiff and can be uncooperative. We side stepped the problem (pun intended) by sheer numbers: some people stood on the tubing while others fastened it down with pole-barn nails and nylon ties. Many feet make light work.

The secret to creating a durable earth floor is several final applications of boiled inseed oil sealer, applied hot and allowed to soak in thoroughly. The oil becomes harder over time, binding the top wearing surface. Several coats of floor wax also further improve wearability. Still, mats or carpet runners are recommended for high-traffic areas. We mixed potter's red iron oxide into the top coat to achieve a deep red-brown finished product.