One of my customers turned me into a GC to solve a moisture problem under his brand new wood floors. One of my long time referrals (20 years now) is an awesome drainage guy. 1/2 his work is redos according to him. If you think irrigation is bad drainage for poor workmanship and ineptness is 10 times worse. Any way he came across some of the irrigation. Point out weird stuff. Some is work his guys did. Some is mine.