When you have outdoor masonry work around your home, it requires care to ensure that it stays in good shape. Masonry work that is exposed to the elements for a long time will crack up and crumble if nothing is done to preserve it. This is because water will make it into tiny cracks and then expand and contract with the changing temperatures, slowly deteriorating the material until it breaks apart.
There are 2 important things that you should do to protect your masonry work. The first is to make sure that there is proper grading around the masonry work so water flows away from it instead of pooling up around it.
Another good way to protect your masonry work is to make sure it is sealed up well. There are ways to do this by applying a protective coating to the masonry work with regularity. These products can be found in hardware stores and are fairly simple to apply.