I have a detatched garage that is built on what appears to be a cement slab in a low-lying area. It is sided with Masonite-type siding, and the bottom course of this siding is in contact with the driveway and ground. Due to capillary action in the siding, moisture from ground-level is being absorbed upwards into the siding, causing it to swell and rot. What can I do to stop this? Should I remove the damaged siding? If so do I have to replace all of the siding, or can I just remove the bottom course? And what should I use to replace it(Brick would look great, because my house is brick, but I'm not sure I want to go through the mess of digging a trench below the frostline for footings.)? Is there something I can use that will be either moisture proof or can have a sealer applied to it that will protect the sill from moisture?