[ZimRandy]

Don't forget to consider whether or not the local city or county will even allow drains. In some areas, garage drains are not allowed.

Drains after the fact aren't real functional, as the slab needs to have the proper grade to allow the water to run towards it. If the slab is flat, then you will still have to push all of the water to the drain with a squeegee.

Try one of the high end squeegees that are made from a folded over 'foam', not the hard rubber style and push it out the door.

Randy