Install only the first two fasteners closest to your starting point, before connecting the second GreenGirt piece.
Before interlocking two GreenGirt pieces, slightly bend the extended metal tabs forward to easily connect the two pieces against a substrate.
Leave 1/16″ gap between interlocking GreenGirt pieces to allow for building expansion and contraction.
Pre-load pre-cut insulation strip underneath sill GreenGirt piece before installing fasteners.