Our garage slopes towards the house, not the driveway. It is usually only an issue during the winter when snow and slush melts onto the garage floor. Is there any kind of product I can use to put on the floor to keep the water from the wall? Also, when it is windy and raining, the wind drives the water under the garage door. Any way to stop that? Thanks.

There should be some type of rubber weather strip at the bottom of the garage door. Have you inspected this.