The veneer ply is hung on 3/8" cdx, which provides structural support. Where there are joints clear finish edge banding was applied for a nice clean maple looking finish at the gap. Rather intensive work, but very satisfying results. Is the plywood attached straight on the studs? PRO Smith & Vansant Architects PC No, there is a thin plywood substrate over the studs. This allows for better fastening for the veneer ply and smaller reveal depth.