When something goes wrong with your house, say water is dripping into the attic, you call in a contractor to take a look and get it fixed. They’re also responsible for getting to the root cause of an issue. Why is the water dripping in? There’s some shingles missing off the roof from the hurricane. Why were the shingles able to come off? Because the roof is old and improperly built. Why? Because the guy who owned the house before I did didn’t know what he was doing and now we have to spend a ton of money to replace it all.