The answer to 'patio installation disease' is that there are a few common issues that can arise during patio installation, including uneven settling, cracking, and weed growth. Uneven settling can be caused by improper base preparation or poor drainage, leading to an unstable patio surface. Cracking is often due to expansion and contraction of the materials, especially in areas with extreme temperature changes. Weed growth can be an ongoing problem if the patio isn't properly sealed or if there are gaps between the pavers.
To address these issues, it's important to ensure the patio base is properly prepared with a compacted gravel or crushed stone foundation. Using high-quality paving materials and sealing the patio can also help prevent cracking and weed growth. However, more complex problems like major settling or structural issues may require the expertise of a professional landscaper or patio installation specialist.