The answer to 'hardscaping turning brown' is that there are several common causes, including excessive sun exposure, lack of moisture, and chemical damage. Symptoms may include discoloration, cracking, or peeling of the hardscaping materials. Solutions can vary depending on the underlying cause, but may include applying sealants, providing more shade, or adjusting irrigation.
If the issue is minor, homeowners may be able to address it themselves through DIY maintenance. However, for more severe or widespread problems, it's generally best to call in a professional landscaper or hardscaping specialist to diagnose and resolve the issue properly.