The slab in the carport constantly gets wet from snow and rain brought in by the car. Since I didn't think ahead and make grooves in the slab or build up a layer with leca, moisture sometimes reaches the sill. The moisture comes from the side and not from underneath through the sill paper, as it is dry around the expansion bolt. The culprit is likely that I've let the paper stick out a few centimeters, and water that comes to the edge easily ends up on the wrong side of the paper. Do you have any suggestions for a clever solution, or is the obvious "fold up the paper solution" the way to go?
If the water only comes from the floor, the upturn might work, but if rain and snow come from above on the sill, it will likely function as a valley for meltwater.
Most likely there will be both rain and snow sometimes from above as well. For that reason, folding up does not feel like the best way. Is there another way? It must be a common problem in warm garages where you drag in snow and ice that melts, unless you have floor drains.
One option is to apply self-leveling compound on the last few decimeters before the sill so that you get a slight slope away from it. Mix the self-leveling compound thickly so you can almost trowel it. Place a small strip of roofing felt or something similar like an L in the corner floor-sill.
Then you must cover the wall with paneling or similar so that rain/snow doesn't get behind the self-leveled edge. Leave a 1 cm gap towards the floor.
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