Been thinking about getting a mint series 1 now for a while but i have a slight concern

My garage leaks Now the water runs down the back of the garage, just in the corners and the roof soaks up the water also So obviously when it rains you go in the garage and the floor is damp and it smells damp. I have got some tarpaulin up so any drips from the roof run down this and out towards the door

BUT, my question is............ will this have an effect on the car? Especially as it will be sat in the garage for about 8 months of the year