The answer to 'why is my patio installation' is that there could be several common causes, such as improper site preparation, poor drainage, using the wrong materials, or mistakes in the installation process. Symptoms may include cracks, uneven surfaces, or premature deterioration of the patio. Solutions depend on the specific issue, but could involve regrading the site, upgrading the base, or completely redoing the patio installation.
In general, it's best to call a professional landscaping contractor for patio installation, as they have the right equipment, experience, and expertise to ensure a durable, long-lasting patio. While some basic patio maintenance tasks can be done DIY, complex issues or full patio replacements are usually best left to the pros.