Metal shed floor & condensation
Our 17 year old steel shed was installed directly on the ground. The steel shed is 10 x 15 with an attached steel floor. We understand that it should not had been installed directly over soil. One corner of the floor has rusted out - we have put heavy steel sheets over that area. We have emptied out and are revamping the shed. We sanded all rust, primed with red oxide, and painted with oil-based rustoleum enamel (inside and out). We lined and glued Styrofoam sheets to the ceiling to stop condensation. We are thinking of covering the steel floor with vinyl (from our old pool) and placing flakeboard or plywood over that in order to stop condensation from the ground. We know that the floor will probably eventually rust from being covered with vinyl but we are trying to cut down the condensation (which is very bad). We really want the shed to last another 20 years since if we replace it we must go with one that is much smaller (the town has grandfathered in this shed).
What do you all think we should do?