5 Most Common Code Violations in New Home Construction, by the inspectors at Discovery Inspections. For roofs, we have not been seeing proper counterflashing for chimneys.
Valleys also require flashing.
H clips missing at roof sheathing joints. Gutter extensions to divert water a minimum of 5 feet away from structure. The entire roof water is dumped at the foundation. This causes erosion that can undermine the footer and it also unnecessarily challenges basement walls. Splash blocks are not acceptable.