 If the roof's just been put on in the last five years, the HVAC's newer, the hot water tank, and all the big blocks, and I know foundation walls really good because that's my background as far as foundations to see if there's any leaks or problems structurally or anything like that. Even though I don't say I'm a home inspector, I am not an engineer for walls and foundations, but I do know enough to be dangerous by being around it quite a bit.