If your new home is built during a wet season, you will experience lumber shrinkage. This can cause ceramic tile, backsplashes, drywall and flooring cracks, among other problems. If possible, allow your house to dry out before installing all the materials inside.
The crown of a piece of lumber is the upward arch you see when you look down its narrowest edge. In your new home, builders who don't take crowns into consideration can create humps or dips in floors or walls. Engineered wood, floor trusses and I joists can be used to eliminate crown problems.
Buckling roof plywood below asphalt shingles is a result of many things. Wood expands and contracts, so there may not have been adequate planned spacing between plywood boards. Check for proper attic ventilation. A buildup of water vapor is a problem.