The homes I studied in Wilson were all built between 2004 and 2009. This home was almost completely destroyed; shown here is an end wall, which was braced at the corners with OSB and had nonstructural extruded polystyrene as infill sheathing.
The home's bottom plate — shown with bits of the foam sheathing still attached — was intact; structural wall sheathing would have greatly strengthened this connection between the wall studs and the bottom plate.
A closeup view reveals that interior drywall — which would not have been present on the attic gable above — probably helped hold the wall together.
Though this home's roof remained largely intact, several of the exterior walls were blown out — a testament to both the tornado's lack of strength and the inability of poorly executed framing connections to maintain integrity of the building envelope.