Repairing a sagging interior car roof liner, or headliner, is a common DIY task that can save you hundreds of dollars. The most effective permanent fix involves removing the headliner board from the car, completely stripping the old, failed foam backing, and applying a new high-quality headliner adhesive and fabric. While temporary fixes like headliner pins or spray adhesives exist, they are often short-lived and can look messy.
The root cause of a sagging headliner is the degradation of the foam layer sandwiched between the fabric and the fiberboard backing. Over time, heat and humidity cause this foam to crumble, losing its grip. A proper repair addresses this core issue.
The Professional Repair Process:
- Safe Removal: Carefully remove trim pieces, visors, dome lights, and handles. The headliner board is fragile, so gently maneuver it out of the car, often through a rear door or hatchback.
- Thorough Cleaning: Peel off the old fabric and meticulously scrape away all the crumbled foam from the board. Use a stiff brush and vacuum to get a perfectly clean surface. Any residue will prevent the new adhesive from bonding correctly.
- Applying New Adhesive and Fabric: Spray a dedicated headliner adhesive evenly onto both the board and the back of your new fabric—whether it's a custom pre-cut kit or material from a fabric store. High-temperature spray adhesive is essential.
- Precise Installation: After letting the adhesive become tacky, carefully lay the fabric onto the board, starting from the center and working outwards to smooth out wrinkles. Trim excess material around edges and cutouts for fixtures.
- Reinstallation: Once the adhesive is fully cured, reverse the removal process to put the headliner and all trim pieces back into the car.
| Repair Method | Estimated Cost (DIY) | Estimated Professional Cost | Longevity | Skill Level Required |
|---|
| Headliner Pins/Clips | $10 - $20 | N/A (DIY only) | 6-12 months | Beginner |
| Spray Adhesive (in-car) | $15 - $30 | $100 - $200 | 1-2 years | Intermediate |
| Complete Fabric Replacement | $50 - $150 (kit) | $400 - $800+ | 5+ years | Advanced |
