Originally Posted by meanjoebean
Why do you want the boat off the ground besides the not wanting to run over it with your car? Just curious....
The boat does not have to be off the ground, just off the concrete since concrete leaches and you don't want your boat sitting against a wet surface. You can use any barrier, cardboard, plastic sheeting, tarp, etc. I put my boat on milk crates.
Also if you have windows in your garage it is good to keep it covered. UV light will break down your boat over time as well. Fancy boat covers work, but so do cheap car covers or tarps.