Tack weld the front and rear corner edge of the roof panel.
Temporarily install the roof moldings, windshield, doors, and tailgate, then check for differences in level and clearance. Check the operation of the tailgate.
Do the main welding.
From inside the vehicle, weld the front roof rail (A) and rear roof rail (B).
Weld the front, rear and side flange of the roof panel (C).
The roof area must be free of burrs and/or sharp edges to prevent damage to the side curtain airbag during deployment.