Hydro-2000, a synthetic rubber obtained from Mercote and applied with brush or roller  to the belly pan or external floor bottom.  Cost in 2000  was $40.00 per gallon. The liquid rubber is easy to work with and is applied in thin coats. One gallon is more than sufficient,

The floor area was insulated with Owen Corning's pink panther, 1-1/2" insulation with an R factor = 7.5.   This insulation was easy to cut and lay snuggly  between the oak members.

Frame is constructed from 2" x 4 " White Oak obtained from a local hardwood shop. The frame was lap jointed, glued, screwed and then bolted to the gussets with 3/8" x 5" lag bolts.  The 5" bolts are necessary to get through the two frames and plywood. Cost was $120.00 for 40 board feet which included milling to the standard size 1 1/2" x 3 1/2" of the raw material.