 an area rug when should it get wet you're able to clean it toss it whatever absolutely in terms of that sidewalk outside you know that's probably an asphalt sealant that was used between the sidewalk and the house just generally speaking on the outside of your house make sure the water is draining away from the foundation and if that sidewalk slab happens to pitch in to the house that's a bad thing no matter what you sell it with you're not going to stop water from getting into that wall