Our home's walls, floors, porch, patio, roof, plumbing, lights — and so on — form our own personal safety net. When you look at it that way, of course you want to do everything you can to protect that inner sanctum. But you might not be doing such a great job. In fact, there are dozens of ways you can damage your home without even thinking about it. From the roof to the lawn — and lots of stuff in between — here are some bad homeowner habits you might want to think about breaking.