An un even floor in your garage it is very common.
My garage floor slope is too much car hits.
But they got one low spot right where i got out of my car.
1 attach one end of the string level to the wall of the garage furthest from the main door.
If the floor is hand screeded and isn t re leveled during the finishing process you may get a few minor birdbaths with the 1 8 ft slope but nothing a quick squeegie won t fix.
Depending on how smooth your garage floor is and wheel diameter and ramp slope it might stay in place fine with just some foam rubber weatherstripping on the bottom note with time this can stick to and peel garage floor paint or other finishes or might have to be bolted down into the concrete slab so it does not get shoved across the floor as the car starts onto it.
I d slope it as much as you can stand.
In the case of your garage floor i would treat it very aggressively because a smooth concrete surface that has slush and water on it is almost as slippery as a surface can get.
Structurally it s not feasible to raise the roof of your garage but if you ve got no alternative then you could lower the floor.
The floor is sloped to allow fluids to drain and that s not a bad idea should you or the next occupant want to park a car there again.
Your body is meant to traverse rough ground all over the earth and lift objects on various types of uneven ground.
Actually a very slight slope like 1 16 will get rid of the water with a little help from a squeegie.
Determining the angle of your floor s slope provides a simple method to level work surfaces in the garage.
The connection between the garage floor and the apron is subject to pressure from fluctuations in temperature and the weight of vehicles at the stress point.
One solution is to.
You would then find a gap where the garage door ends but hey.
Your figure of 1 4 per foot doesn t sound bad.
So during the winter melted snow and rain would puddle there and freeze.
Should be about 1 8 foot slope from sides toward center and from back to front which will drain to the center and then to the door.
When they poured my garage slab in my last house i asked em to slope it a lot.
The apron is usually constructed with more thickness than the main part of the driveway to add resistance to pressure and reinforced with welded wire mesh.