While running through your roof maintenance checklist, make sure you check out your chimney for cracks or missing mortar. Structural damage of any size can cause bricks to start falling out, which can damage your roof, let alone cause your chimney to collapse. You can either hire a contractor to patch up any mortar cracks, or break out a trowel and do it yourself. A sloping or leaning chimney can be caused by issues with your home’s foundation as well. If you notice your chimney has moved, call a contractor to have it fixed right away and check the rest …