Revisions log for Answer #142

When creating the slab, it's important to plan the end of the garage door on the floor slab from the beginning. There should be a small overhang on the outside that prevents rainwater from flowing from the outside to the inside if it rains the slightest bit. That is, the door seal is about 0.5-1 cm below the floor level of the garage. Of course, it has to be in the right place, but you have to know exactly how the door will be installed. We forgot to do this because the door was not planned until a year later (sectional doors), and now water from time to time gets outside...