Civil Code Section 897 - Unspecified Function or Component
The standards set forth in this chapter are intended to address every function or component of a structure. To the extent that a function or component of a structure is not addressed by these standards, it shall be actionable if it causes damage.
(7) Irrigation systems and drainage shall operate properly so as not to damage landscaping or other external improvements. However, no action shall be brought pursuant to this paragraph more than one year from close of escrow.
(8) Untreated wood posts shall not be installed in contact with soil so as to cause unreasonable decay to the wood based upon the finish grade at the time of original construction. However, no action shall be brought pursuant to this paragraph more than two years from close of escrow.