Abstract: A fiberglass headliner with integrally reinforced roof bows and roof rail for improved structural rigidity. Selected areas of a resin bonded fiberglass headliner are infiltrated and saturated with a suitable liquid thermosetting resin to a predetermined depth and width. The spaces between glass fibers in a resin bonded fiberglass panel are filled with this additional resin to form hardened and rigid sections when cured in a subsequent compression molding process. These hardened areas of resin saturation provide structural rigidity to partially support a vehicle roof panel and to temporarily carry various roof mounted accessories attached in a subassembly process to form a headliner module.