Garage floor slope after changing door opening?

Question

As part of a recent remodel of our San Jose, California home,we changed the garage door location of our standard 22'x22' garage from being south facing to west facing.
The problem is the original floor sloped slightly from the north end to the south end (difference : 1.5 inches) - and hence we now have this potential problem of water accoumulating at the new south wall.
The existing floor is in very good condition with the exception of small cracks here and there.
Any suggestions to re-slope the floor without a completely redo is highly appreciated.

Thanks in advance,
-ra

Answer 1

I wouldn't worry. It will be a big hassle to change and likely would lead to other problems. When was the last time you used a hose to clean that floor? And in San Jose you aren't driving a car covered in snow and in ice in there to thaw out. You'll be fine.

Answer 2

The new south wall is apparently already in place; but if there is some way to modify the base of the wall so that water drains thru the wall base... like maybe use some grating material in the wall to allow water thru. That seems to me like the simplest way out.

Otherwise you might build an east-west trough in the middle by raising the current south floor 1.5 inches and sloping to nothing at 11 feet north. That would be a more challenging project.

12/26 I like what Papa John suggested. It would be something like a funnel on the floor. Maybe the floor grooves could be managed with something lightweight, durable, that you left on the floor, so shallower grooves or maybe no grooves would need to be cut into the old floor. (Currently I don't have anything specific -- to lay down on the floor -- and I'm thinking anything placed on the floor makes a tripping hazard too, but YOU might come up with an option that would work adequately for you.)

Answer 3

The floor underneath door need to rise by adds thickness of floor till both sides at same level.

Muhammad Irwan
Siem Reap
Cambodia

Answer 4

If you really want it to drain, have a concrete guy come out and saw some grooves to a central spot on that wall and run a small drain out the wall. Not a big deal.