Water coming under my garage door.

Not sure under which heading i can post this question if it's in the wrong place let me know.
I have a Panel Lift door at the front and a roller door at the back and when ever it rains I get water coming in from under the seals. The Drive way slopes away from the door and so does the court yard so it's not the concrete it seems to be the driving rain that cause it to come underneath. It a new house and I spoke to the builder about it but they turned around and said that the Garage is not covered under any warranty for water leaks because it is does not have to be water proofed. (By the way the builder is Metricon which will explains a lot).
A friend said to put a garden hose in the seal along the whole length of the door to make it more rigid but it did not help.
It's a plastered garage so it is slowly destroying the plaster.Has anyone got any ideas on what I can do thanks.


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