If you built it and it has a problem, I can find out why. For example: differential settling, reinforcing steel failure, thrust, footing failure, improperly compacted fill, pedestal failure, column failure, framing failure, incorrect design, erosion, work performed by laypeople without designs, thermal expansion, natural flooding, plumbing-related flooding, fire, tornado, earthquake, rot, age-related concrete and masonry failure, termite infestation, expansive soils, improper drainage, soil evacuation due to waste system failure, contractor error, and contractor fraud (to name a few).