Waldo, i was planning on masonry board on the floor,unfinished,thought it would hold up to foot traffic without costing too much. Ceramic tiles would crack at the drop of a shovel or pipe wrench,wouldn't they ? We could pour concrete 2 " thick to cover the solid wood floor,that would take more time & money.FRP on the walls is a good possibility,i will check on availability & price,no finishing or painting necessary on that stuff.We do not have every thing decided yet so suggestions are welcome but must meet the following criteria.Low cost is at the top of that list,free is better
,durable,long lasting,simple & sensible.My motto is Keep It Sensibly Simple. This project came to be only after much finagling with banks till we got one to approve the loan,we did not get as much as we wanted to so some free steps along the way will help to keep $$ for coal purchase. That is the only reason we shoveled the dirt,we were going to rent a machine but saved the money for coal.Our neighbor moved the OWB at no charge,more coal $$,he also spread most of the stones,no charge,more coal money. The man we bought the box from got the wrecker/crane job for us at a deep discount. EWF ,the energy we will save retiring from wood has been & will be somewhat used up getting this project finished,doing it the hard way to save $$,but will be worth it in the long run.