Hello I looked at a job today they had sod put in in 2005 and 2010 it was all dead. They havent really maintained it since so diagnosing the problem is kind of hard. The soil looks like fine grit top soil and is kind of hard packed. Could the compaction be the problem for the lawn dieing? Customer had many people come out for disease and pest but nothing ever worked. Also I think it is really close to not having enough sunlight so this may have contributed as well but idk. How much sunlight is required for bluegrass sod. Im in michigan.