We have a brick sidewalk that runs along the side of our house. We are located in northern Illinois. It was installed several years ago. The installer placed the bricks right up against the side of the house. We are wondering if there should have been a space left between the house and the beginning of the bricks i.e., crushed rock, stones). This section of the house is over a crawl space, and we have noticed a damp odor in the bathroom which is located above the floor of the crawl space. The crawl space walls have been insulated. Any suggestions would be appreciated. Thank you.